AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds a new 'session' field to 'struct liveupdate_file_op_args' and two new exported functions 'liveupdate_get_file_incoming' and 'liveupdate_get_token_outgoing'. However, the new functions are not called anywhere in the kernel, and the new 'session' field is populated but never read by any file handler (e.g., in mm/memfd_luo.c). Thus, the patch introduces unused API and dead code, making no functional changes to the execution flow.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 5f76fa37e0aab9521d8ef136d2c07b9ecd8a8d81\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Jul 25 02:51:16 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/linux/liveupdate.h b/include/linux/liveupdate.h\nindex 63ea5417de849a..6051abc0612cee 100644\n--- a/include/linux/liveupdate.h\n+++ b/include/linux/liveupdate.h\n@@ -25,6 +25,7 @@ struct file;\n /**\n  * struct liveupdate_file_op_args - Arguments for file operation callbacks.\n  * @handler:          The file handler being called.\n+ * @session:          The session this file belongs to.\n  * @retrieve_status:  The retrieve status for the 'can_finish / finish'\n  *                    operation. A value of 0 means the retrieve has not been\n  *                    attempted, a positive value means the retrieve was\n@@ -45,6 +46,7 @@ struct file;\n  */\n struct liveupdate_file_op_args {\n \tstruct liveupdate_file_handler *handler;\n+\tstruct liveupdate_session *session;\n \tint retrieve_status;\n \tstruct file *file;\n \tu64 serialized_data;\n@@ -247,6 +249,14 @@ void liveupdate_flb_put_incoming(struct liveupdate_flb *flb);\n int liveupdate_flb_get_outgoing(struct liveupdate_flb *flb, void **objp);\n void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb);\n \n+/* kernel can internally retrieve files */\n+int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,\n+\t\t\t\t struct file **filep);\n+\n+/* Get a token for an outgoing file, or -ENOENT if file is not preserved */\n+int liveupdate_get_token_outgoing(struct liveupdate_session *s,\n+\t\t\t\t  struct file *file, u64 *tokenp);\n+\n #else /* CONFIG_LIVEUPDATE */\n \n static inline bool liveupdate_enabled(void)\n@@ -299,5 +309,17 @@ static inline void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb)\n {\n }\n \n+static inline int liveupdate_get_file_incoming(struct liveupdate_session *s,\n+\t\t\t\t\t       u64 token, struct file **filep)\n+{\n+\treturn -EOPNOTSUPP;\n+}\n+\n+static inline int liveupdate_get_token_outgoing(struct liveupdate_session *s,\n+\t\t\t\t\t\tstruct file *file, u64 *tokenp)\n+{\n+\treturn -EOPNOTSUPP;\n+}\n+\n #endif /* CONFIG_LIVEUPDATE */\n #endif /* _LINUX_LIVEUPDATE_H */\ndiff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c\nindex c39f96961a85be..dbae0715220b10 100644\n--- a/kernel/liveupdate/luo_file.c\n+++ b/kernel/liveupdate/luo_file.c\n@@ -284,6 +284,7 @@ int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd)\n \tmutex_init(\u0026luo_file-\u003emutex);\n \n \targs.handler = fh;\n+\targs.session = luo_session_from_file_set(file_set);\n \targs.file = file;\n \terr = fh-\u003eops-\u003epreserve(\u0026args);\n \tif (err)\n@@ -341,6 +342,7 @@ void luo_file_unpreserve_files(struct luo_file_set *file_set)\n \t\t\t\t\t   struct luo_file, list);\n \n \t\targs.handler = luo_file-\u003efh;\n+\t\targs.session = luo_session_from_file_set(file_set);\n \t\targs.file = luo_file-\u003efile;\n \t\targs.serialized_data = luo_file-\u003eserialized_data;\n \t\targs.private_data = luo_file-\u003eprivate_data;\n@@ -374,6 +376,7 @@ static int luo_file_freeze_one(struct luo_file_set *file_set,\n \t\tstruct liveupdate_file_op_args args = {0};\n \n \t\targs.handler = luo_file-\u003efh;\n+\t\targs.session = luo_session_from_file_set(file_set);\n \t\targs.file = luo_file-\u003efile;\n \t\targs.serialized_data = luo_file-\u003eserialized_data;\n \t\targs.private_data = luo_file-\u003eprivate_data;\n@@ -395,6 +398,7 @@ static void luo_file_unfreeze_one(struct luo_file_set *file_set,\n \t\tstruct liveupdate_file_op_args args = {0};\n \n \t\targs.handler = luo_file-\u003efh;\n+\t\targs.session = luo_session_from_file_set(file_set);\n \t\targs.file = luo_file-\u003efile;\n \t\targs.serialized_data = luo_file-\u003eserialized_data;\n \t\targs.private_data = luo_file-\u003eprivate_data;\n@@ -587,6 +591,7 @@ int luo_retrieve_file(struct luo_file_set *file_set, u64 token,\n \t}\n \n \targs.handler = luo_file-\u003efh;\n+\targs.session = luo_session_from_file_set(file_set);\n \targs.serialized_data = luo_file-\u003eserialized_data;\n \terr = luo_file-\u003efh-\u003eops-\u003eretrieve(\u0026args);\n \tif (err) {\n@@ -620,6 +625,7 @@ static int luo_file_can_finish_one(struct luo_file_set *file_set,\n \t\tstruct liveupdate_file_op_args args = {0};\n \n \t\targs.handler = luo_file-\u003efh;\n+\t\targs.session = luo_session_from_file_set(file_set);\n \t\targs.file = luo_file-\u003efile;\n \t\targs.serialized_data = luo_file-\u003eserialized_data;\n \t\targs.retrieve_status = luo_file-\u003eretrieve_status;\n@@ -637,6 +643,7 @@ static void luo_file_finish_one(struct luo_file_set *file_set,\n \tguard(mutex)(\u0026luo_file-\u003emutex);\n \n \targs.handler = luo_file-\u003efh;\n+\targs.session = luo_session_from_file_set(file_set);\n \targs.file = luo_file-\u003efile;\n \targs.serialized_data = luo_file-\u003eserialized_data;\n \targs.retrieve_status = luo_file-\u003eretrieve_status;\n@@ -926,3 +933,65 @@ void liveupdate_unregister_file_handler(struct liveupdate_file_handler *fh)\n \tluo_flb_unregister_all(fh);\n \tlist_del(\u0026ACCESS_PRIVATE(fh, list));\n }\n+\n+/**\n+ * liveupdate_get_token_outgoing - Get the token for a preserved file.\n+ * @s:      The outgoing liveupdate session.\n+ * @file:   The file object to search for.\n+ * @tokenp: Output parameter for the found token.\n+ *\n+ * Searches the list of preserved files in an outgoing session for a matching\n+ * file object. If found, the corresponding user-provided token is returned.\n+ *\n+ * This function is intended for in-kernel callers that need to correlate a\n+ * file with its liveupdate token.\n+ *\n+ * Context: It must be called with session mutex acquired.\n+ * Return: 0 on success, -ENOENT if the file is not preserved in this session.\n+ */\n+int liveupdate_get_token_outgoing(struct liveupdate_session *s,\n+\t\t\t\t  struct file *file, u64 *tokenp)\n+{\n+\tstruct luo_file_set *file_set = luo_file_set_from_session_locked(s);\n+\tstruct luo_file *luo_file;\n+\tint err = -ENOENT;\n+\n+\tlist_for_each_entry(luo_file, \u0026file_set-\u003efiles_list, list) {\n+\t\tif (luo_file-\u003efile == file) {\n+\t\t\tif (tokenp)\n+\t\t\t\t*tokenp = luo_file-\u003etoken;\n+\t\t\terr = 0;\n+\t\t\tbreak;\n+\t\t}\n+\t}\n+\n+\treturn err;\n+}\n+EXPORT_SYMBOL_GPL(liveupdate_get_token_outgoing);\n+\n+/**\n+ * liveupdate_get_file_incoming - Retrieves a preserved file for in-kernel use.\n+ * @s:      The incoming liveupdate session (restored from the previous kernel).\n+ * @token:  The unique token identifying the file to retrieve.\n+ * @filep:  On success, this will be populated with a pointer to the retrieved\n+ *          'struct file'.\n+ *\n+ * Provides a kernel-internal API for other subsystems to retrieve their\n+ * preserved files after a live update. This function is a simple wrapper\n+ * around luo_retrieve_file(), allowing callers to find a file by its token.\n+ *\n+ * The caller receives a new reference to the file and must call fput() when it\n+ * is no longer needed. The file's lifetime is managed by LUO and any userspace\n+ * file descriptors.\n+ *\n+ * Context: It must be called with session mutex acquired of a restored session.\n+ * Return: 0 on success. Returns -ENOENT if no file with the matching token is\n+ *         found, or any other negative errno on failure.\n+ */\n+int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,\n+\t\t\t\t struct file **filep)\n+{\n+\treturn luo_retrieve_file(luo_file_set_from_session_locked(s),\n+\t\t\t\t token, filep);\n+}\n+EXPORT_SYMBOL_GPL(liveupdate_get_file_incoming);\ndiff --git a/kernel/liveupdate/luo_internal.h b/kernel/liveupdate/luo_internal.h\nindex 64879ffe73781c..dac6644bfb18aa 100644\n--- a/kernel/liveupdate/luo_internal.h\n+++ b/kernel/liveupdate/luo_internal.h\n@@ -77,6 +77,23 @@ struct luo_session {\n \n extern struct rw_semaphore luo_register_rwlock;\n \n+static inline struct liveupdate_session *luo_session_from_file_set(struct luo_file_set *file_set)\n+{\n+\tstruct luo_session *session;\n+\n+\tsession = container_of(file_set, struct luo_session, file_set);\n+\n+\treturn (struct liveupdate_session *)session;\n+}\n+\n+static inline struct luo_file_set *luo_file_set_from_session_locked(struct liveupdate_session *s)\n+{\n+\tstruct luo_session *session = (struct luo_session *)s;\n+\n+\tlockdep_assert_held(\u0026session-\u003emutex);\n+\treturn \u0026session-\u003efile_set;\n+}\n+\n int luo_session_create(const char *name, struct file **filep);\n int luo_session_retrieve(const char *name, struct file **filep);\n void __init luo_session_setup_outgoing(u64 *sessions_pa);\n"
}

best-expensive

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds a new 'session' field to 'struct liveupdate_file_op_args' and two new exported functions 'liveupdate_get_file_incoming' and 'liveupdate_get_token_outgoing'. However, the new functions are not called anywhere in the kernel, and the new 'session' field is populated but never read by any file handler (e.g., in mm/memfd_luo.c). Thus, the patch introduces unused API and dead code, making no functional changes to the execution flow.",
  "WorthFuzzing": false
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
  even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs
   output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit 5f76fa37e0aab9521d8ef136d2c07b9ecd8a8d81
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Jul 25 02:51:16 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/linux/liveupdate.h b/include/linux/liveupdate.h
index 63ea5417de849a..6051abc0612cee 100644
--- a/include/linux/liveupdate.h
+++ b/include/linux/liveupdate.h
@@ -25,6 +25,7 @@ struct file;
 /**
  * struct liveupdate_file_op_args - Arguments for file operation callbacks.
  * @handler:          The file handler being called.
+ * @session:          The session this file belongs to.
  * @retrieve_status:  The retrieve status for the 'can_finish / finish'
  *                    operation. A value of 0 means the retrieve has not been
  *                    attempted, a positive value means the retrieve was
@@ -45,6 +46,7 @@ struct file;
  */
 struct liveupdate_file_op_args {
 	struct liveupdate_file_handler *handler;
+	struct liveupdate_session *session;
 	int retrieve_status;
 	struct file *file;
 	u64 serialized_data;
@@ -247,6 +249,14 @@ void liveupdate_flb_put_incoming(struct liveupdate_flb *flb);
 int liveupdate_flb_get_outgoing(struct liveupdate_flb *flb, void **objp);
 void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb);
 
+/* kernel can internally retrieve files */
+int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,
+				 struct file **filep);
+
+/* Get a token for an outgoing file, or -ENOENT if file is not preserved */
+int liveupdate_get_token_outgoing(struct liveupdate_session *s,
+				  struct file *file, u64 *tokenp);
+
 #else /* CONFIG_LIVEUPDATE */
 
 static inline bool liveupdate_enabled(void)
@@ -299,5 +309,17 @@ static inline void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb)
 {
 }
 
+static inline int liveupdate_get_file_incoming(struct liveupdate_session *s,
+					       u64 token, struct file **filep)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int liveupdate_get_token_outgoing(struct liveupdate_session *s,
+						struct file *file, u64 *tokenp)
+{
+	return -EOPNOTSUPP;
+}
+
 #endif /* CONFIG_LIVEUPDATE */
 #endif /* _LINUX_LIVEUPDATE_H */
diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c
index c39f96961a85be..dbae0715220b10 100644
--- a/kernel/liveupdate/luo_file.c
+++ b/kernel/liveupdate/luo_file.c
@@ -284,6 +284,7 @@ int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd)
 	mutex_init(&luo_file->mutex);
 
 	args.handler = fh;
+	args.session = luo_session_from_file_set(file_set);
 	args.file = file;
 	err = fh->ops->preserve(&args);
 	if (err)
@@ -341,6 +342,7 @@ void luo_file_unpreserve_files(struct luo_file_set *file_set)
 					   struct luo_file, list);
 
 		args.handler = luo_file->fh;
+		args.session = luo_session_from_file_set(file_set);
 		args.file = luo_file->file;
 		args.serialized_data = luo_file->serialized_data;
 		args.private_data = luo_file->private_data;
@@ -374,6 +376,7 @@ static int luo_file_freeze_one(struct luo_file_set *file_set,
 		struct liveupdate_file_op_args args = {0};
 
 		args.handler = luo_file->fh;
+		args.session = luo_session_from_file_set(file_set);
 		args.file = luo_file->file;
 		args.serialized_data = luo_file->serialized_data;
 		args.private_data = luo_file->private_data;
@@ -395,6 +398,7 @@ static void luo_file_unfreeze_one(struct luo_file_set *file_set,
 		struct liveupdate_file_op_args args = {0};
 
 		args.handler = luo_file->fh;
+		args.session = luo_session_from_file_set(file_set);
 		args.file = luo_file->file;
 		args.serialized_data = luo_file->serialized_data;
 		args.private_data = luo_file->private_data;
@@ -587,6 +591,7 @@ int luo_retrieve_file(struct luo_file_set *file_set, u64 token,
 	}
 
 	args.handler = luo_file->fh;
+	args.session = luo_session_from_file_set(file_set);
 	args.serialized_data = luo_file->serialized_data;
 	err = luo_file->fh->ops->retrieve(&args);
 	if (err) {
@@ -620,6 +625,7 @@ static int luo_file_can_finish_one(struct luo_file_set *file_set,
 		struct liveupdate_file_op_args args = {0};
 
 		args.handler = luo_file->fh;
+		args.session = luo_session_from_file_set(file_set);
 		args.file = luo_file->file;
 		args.serialized_data = luo_file->serialized_data;
 		args.retrieve_status = luo_file->retrieve_status;
@@ -637,6 +643,7 @@ static void luo_file_finish_one(struct luo_file_set *file_set,
 	guard(mutex)(&luo_file->mutex);
 
 	args.handler = luo_file->fh;
+	args.session = luo_session_from_file_set(file_set);
 	args.file = luo_file->file;
 	args.serialized_data = luo_file->serialized_data;
 	args.retrieve_status = luo_file->retrieve_status;
@@ -926,3 +933,65 @@ void liveupdate_unregister_file_handler(struct liveupdate_file_handler *fh)
 	luo_flb_unregister_all(fh);
 	list_del(&ACCESS_PRIVATE(fh, list));
 }
+
+/**
+ * liveupdate_get_token_outgoing - Get the token for a preserved file.
+ * @s:      The outgoing liveupdate session.
+ * @file:   The file object to search for.
+ * @tokenp: Output parameter for the found token.
+ *
+ * Searches the list of preserved files in an outgoing session for a matching
+ * file object. If found, the corresponding user-provided token is returned.
+ *
+ * This function is intended for in-kernel callers that need to correlate a
+ * file with its liveupdate token.
+ *
+ * Context: It must be called with session mutex acquired.
+ * Return: 0 on success, -ENOENT if the file is not preserved in this session.
+ */
+int liveupdate_get_token_outgoing(struct liveupdate_session *s,
+				  struct file *file, u64 *tokenp)
+{
+	struct luo_file_set *file_set = luo_file_set_from_session_locked(s);
+	struct luo_file *luo_file;
+	int err = -ENOENT;
+
+	list_for_each_entry(luo_file, &file_set->files_list, list) {
+		if (luo_file->file == file) {
+			if (tokenp)
+				*tokenp = luo_file->token;
+			err = 0;
+			break;
+		}
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(liveupdate_get_token_outgoing);
+
+/**
+ * liveupdate_get_file_incoming - Retrieves a preserved file for in-kernel use.
+ * @s:      The incoming liveupdate session (restored from the previous kernel).
+ * @token:  The unique token identifying the file to retrieve.
+ * @filep:  On success, this will be populated with a pointer to the retrieved
+ *          'struct file'.
+ *
+ * Provides a kernel-internal API for other subsystems to retrieve their
+ * preserved files after a live update. This function is a simple wrapper
+ * around luo_retrieve_file(), allowing callers to find a file by its token.
+ *
+ * The caller receives a new reference to the file and must call fput() when it
+ * is no longer needed. The file's lifetime is managed by LUO and any userspace
+ * file descriptors.
+ *
+ * Context: It must be called with session mutex acquired of a restored session.
+ * Return: 0 on success. Returns -ENOENT if no file with the matching token is
+ *         found, or any other negative errno on failure.
+ */
+int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,
+				 struct file **filep)
+{
+	return luo_retrieve_file(luo_file_set_from_session_locked(s),
+				 token, filep);
+}
+EXPORT_SYMBOL_GPL(liveupdate_get_file_incoming);
diff --git a/kernel/liveupdate/luo_internal.h b/kernel/liveupdate/luo_internal.h
index 64879ffe73781c..dac6644bfb18aa 100644
--- a/kernel/liveupdate/luo_internal.h
+++ b/kernel/liveupdate/luo_internal.h
@@ -77,6 +77,23 @@ struct luo_session {
 
 extern struct rw_semaphore luo_register_rwlock;
 
+static inline struct liveupdate_session *luo_session_from_file_set(struct luo_file_set *file_set)
+{
+	struct luo_session *session;
+
+	session = container_of(file_set, struct luo_session, file_set);
+
+	return (struct liveupdate_session *)session;
+}
+
+static inline struct luo_file_set *luo_file_set_from_session_locked(struct liveupdate_session *s)
+{
+	struct luo_session *session = (struct luo_session *)s;
+
+	lockdep_assert_held(&session->mutex);
+	return &session->file_set;
+}
+
 int luo_session_create(const char *name, struct file **filep);
 int luo_session_retrieve(const char *name, struct file **filep);
 void __init luo_session_setup_outgoing(u64 *sessions_pa);

gemini-3.1-pro-preview

null

null

							input: 4723
							output: 22
							thoughts: 142
						

**Analyzing the Live Update Patch**

Okay, so I've got this patch in front of me, and it looks like it's adding some new functionality related to live updates. Specifically, it's introducing a `session` field to the `struct liveupdate_file_op_args` structure. That immediately tells me this is aimed at enhancing the control or tracking of file operations during a live update. Interesting. And it's implementing two new functions: `liveupdate_get_file_incoming` and `liveupdate_get_token_outgoing`. I'm guessing those will handle fetching or managing files and tokens that are coming in or going out during the update process.

Now, let's get down to brass tacks. The patch touches `kernel/liveupdate/luo_file.c`, `include/linux/liveupdate.h`, and `kernel/liveupdate/luo_internal.h`. That's the core live update implementation, the public-facing header, and internal definitions, respectively. Makes sense.

Before I dig too deep, I need to confirm whether this code is even active in our current configuration. I need to make sure `CONFIG_LIVEUPDATE` is indeed the correct configuration option. I'll quickly double-check that.

Alright, time to get more granular. I want to see *where* these new functions, `liveupdate_get_file_incoming` and `liveupdate_get_token_outgoing`, are actually being *used*. So, I'll use `grepper` to run a search for those function names across the codebase. That should give me a good sense of the call graph and the overall impact of this change. From there, I can start to understand the complete picture of how this new session management fits into the broader live update process.

{
  "Expression": "liveupdate_get_file_incoming"
}

{
  "Output": "include/linux/liveupdate.h=250=void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb);\n--\ninclude/linux/liveupdate.h-252-/* kernel can internally retrieve files */\ninclude/linux/liveupdate.h:253:int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,\ninclude/linux/liveupdate.h-254-\t\t\t\t struct file **filep);\n--\ninclude/linux/liveupdate.h=308=static inline void liveupdate_flb_put_outgoing(struct liveupdate_flb *flb)\n--\ninclude/linux/liveupdate.h-311-\ninclude/linux/liveupdate.h:312:static inline int liveupdate_get_file_incoming(struct liveupdate_session *s,\ninclude/linux/liveupdate.h-313-\t\t\t\t\t       u64 token, struct file **filep)\n--\nkernel/liveupdate/luo_file.c=970=EXPORT_SYMBOL_GPL(liveupdate_get_token_outgoing);\n--\nkernel/liveupdate/luo_file.c-972-/**\nkernel/liveupdate/luo_file.c:973: * liveupdate_get_file_incoming - Retrieves a preserved file for in-kernel use.\nkernel/liveupdate/luo_file.c-974- * @s:      The incoming liveupdate session (restored from the previous kernel).\n--\nkernel/liveupdate/luo_file.c-990- */\nkernel/liveupdate/luo_file.c:991:int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,\nkernel/liveupdate/luo_file.c-992-\t\t\t\t struct file **filep)\n--\nkernel/liveupdate/luo_file.c-996-}\nkernel/liveupdate/luo_file.c:997:EXPORT_SYMBOL_GPL(liveupdate_get_file_incoming);\n"
}

gemini-3.1-pro-preview

null

null

							input: 5776
							output: 22
							thoughts: 14
						

Okay, let's dive into this. Here's my thought process on what we're looking at, summarized in the first person, assuming I'm already pretty familiar with the subject matter:

**Checking `liveupdate_get_token_outgoing`**

Alright, time to focus. I need to get a handle on `liveupdate_get_token_outgoing`. What exactly is happening in this part of the code? I should probably assume it's related to some kind of token retrieval, likely for outgoing network requests – probably relating to live updates. Is this token for authentication, authorization, or both? I need to understand its purpose within the live update workflow. What's the context? Where is this function called from? Knowing that will clarify its role in the process. Is there a caching mechanism? How secure is the token generation and retrieval process? And are there any error handling paths to look at? The name suggests it retrieves something, and the "outgoing" part hints that the token is used when contacting some external entity for updates. I wonder if there are any known vulnerabilities or security considerations related to this function, or if there is any place for improvement. It is a good starting point to go over all documentation relating to that function to understand more.

{
  "Expression": "liveupdate_get_token_outgoing"
}

{
  "Output": "include/linux/liveupdate.h=253=int liveupdate_get_file_incoming(struct liveupdate_session *s, u64 token,\n--\ninclude/linux/liveupdate.h-256-/* Get a token for an outgoing file, or -ENOENT if file is not preserved */\ninclude/linux/liveupdate.h:257:int liveupdate_get_token_outgoing(struct liveupdate_session *s,\ninclude/linux/liveupdate.h-258-\t\t\t\t  struct file *file, u64 *tokenp);\n--\ninclude/linux/liveupdate.h=312=static inline int liveupdate_get_file_incoming(struct liveupdate_session *s,\n--\ninclude/linux/liveupdate.h-317-\ninclude/linux/liveupdate.h:318:static inline int liveupdate_get_token_outgoing(struct liveupdate_session *s,\ninclude/linux/liveupdate.h-319-\t\t\t\t\t\tstruct file *file, u64 *tokenp)\n--\nkernel/liveupdate/luo_file.c=927=void liveupdate_unregister_file_handler(struct liveupdate_file_handler *fh)\n--\nkernel/liveupdate/luo_file.c-937-/**\nkernel/liveupdate/luo_file.c:938: * liveupdate_get_token_outgoing - Get the token for a preserved file.\nkernel/liveupdate/luo_file.c-939- * @s:      The outgoing liveupdate session.\n--\nkernel/liveupdate/luo_file.c-951- */\nkernel/liveupdate/luo_file.c:952:int liveupdate_get_token_outgoing(struct liveupdate_session *s,\nkernel/liveupdate/luo_file.c-953-\t\t\t\t  struct file *file, u64 *tokenp)\n--\nkernel/liveupdate/luo_file.c-969-}\nkernel/liveupdate/luo_file.c:970:EXPORT_SYMBOL_GPL(liveupdate_get_token_outgoing);\nkernel/liveupdate/luo_file.c-971-\n"
}

gemini-3.1-pro-preview

null

null

							input: 6608
							output: 20
							thoughts: 141
						

**Analyzing the Kernel Patch**

Okay, so I'm looking at this patch and my initial thought is, "These new functions... they're not even *called* anywhere else in the kernel? That's... unusual." But hold on, the plot thickens. I see they've also gone in and modified some *existing* functions: `luo_preserve_file`, `luo_file_unpreserve_files`, all the way down to `luo_file_finish_one`. It looks like they're inserting `args.session = luo_session_from_file_set(file_set);` in several places within those.

Hmm, so they're tying these new concepts into the existing logic. That means these new functions are likely used transitively. The next thing I need to do is see if `luo_preserve_file` is actually reachable from any execution path. I'm going to follow the function calls to determine its usage. And, of course, I need to check the preprocessor definitions. I should check if `CONFIG_LIVEUPDATE` is defined. This patch seems closely linked to this configuration option.

{
  "Expression": "luo_preserve_file"
}

{
  "Output": "kernel/liveupdate/luo_file.c-46- * 1. Preserve (Normal Operation): A userspace agent preserves files one by one\nkernel/liveupdate/luo_file.c:47: *    via an ioctl. For each file, luo_preserve_file() finds a compatible\nkernel/liveupdate/luo_file.c-48- *    handler, calls its .preserve() operation, and creates an internal \u0026struct\n--\nkernel/liveupdate/luo_file.c=119=static DEFINE_XARRAY(luo_preserved_files);\n--\nkernel/liveupdate/luo_file.c-149- * This structure is the core in-kernel representation of a single file being\nkernel/liveupdate/luo_file.c:150: * managed through a live update. An instance is created by luo_preserve_file()\nkernel/liveupdate/luo_file.c-151- * to link a 'struct file' to its corresponding handler, a user-provided token,\n--\nkernel/liveupdate/luo_file.c=178=static bool luo_token_is_used(struct luo_file_set *file_set, u64 token)\n--\nkernel/liveupdate/luo_file.c-190-/**\nkernel/liveupdate/luo_file.c:191: * luo_preserve_file - Initiate the preservation of a file descriptor.\nkernel/liveupdate/luo_file.c-192- * @file_set: The file_set to which the preserved file will be added.\n--\nkernel/liveupdate/luo_file.c-229- */\nkernel/liveupdate/luo_file.c:230:int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd)\nkernel/liveupdate/luo_file.c-231-{\n--\nkernel/liveupdate/luo_file.c-327- *   3. Releases the reference to the 'struct file' that was taken by\nkernel/liveupdate/luo_file.c:328: *      luo_preserve_file() via fput(), returning ownership.\nkernel/liveupdate/luo_file.c-329- *   4. Frees the memory associated with the internal 'struct luo_file'.\n--\nkernel/liveupdate/luo_flb.c=211=void liveupdate_flb_put_incoming(struct liveupdate_flb *flb)\n--\nkernel/liveupdate/luo_flb.c-249- *\nkernel/liveupdate/luo_flb.c:250: * Context: Called from luo_preserve_file()\nkernel/liveupdate/luo_flb.c-251- * Return: 0 on success, or a negative errno on failure.\n--\nkernel/liveupdate/luo_internal.h=102=int luo_session_deserialize(void);\nkernel/liveupdate/luo_internal.h-103-\nkernel/liveupdate/luo_internal.h:104:int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd);\nkernel/liveupdate/luo_internal.h-105-void luo_file_unpreserve_files(struct luo_file_set *file_set);\n--\nkernel/liveupdate/luo_session.c=263=static int luo_session_preserve_fd(struct luo_session *session,\n--\nkernel/liveupdate/luo_session.c-269-\tguard(mutex)(\u0026session-\u003emutex);\nkernel/liveupdate/luo_session.c:270:\terr = luo_preserve_file(\u0026session-\u003efile_set, argp-\u003etoken, argp-\u003efd);\nkernel/liveupdate/luo_session.c-271-\tif (err)\n"
}

gemini-3.1-pro-preview

null

null

							input: 7980
							output: 17
							thoughts: 74
						

Okay, let me think this through.

**Analyzing the Liveupdate File Operation Patch**

Right, so this patch introduces the `session` field into the `liveupdate_file_op_args` structure. Essentially, it's adding a `session` argument that gets passed down to each of the file handler operations – the `preserve`, `unpreserve`, `freeze`, `unfreeze`, `retrieve`, `can_finish`, and `finish` functions. 

My initial thought is, "Okay, that's interesting. But, hold on a second... Does anyone *actually* leverage that `args->session` data within their specific file handler implementations?" I need to verify whether any handler currently *uses* this new `session` parameter. That's a crucial question. Now I need to go look through the code to see if there are any real-world uses of that session data.

{
  "Expression": "args-\u003esession"
}

{
  "Output": "fs/nfs/nfs4xdr.c=1823=static void encode_bind_conn_to_session(struct xdr_stream *xdr,\n--\nfs/nfs/nfs4xdr.c-1830-\t\tdecode_bind_conn_to_session_maxsz, hdr);\nfs/nfs/nfs4xdr.c:1831:\tencode_opaque_fixed(xdr, args-\u003esessionid.data, NFS4_MAX_SESSIONID_LEN);\nfs/nfs/nfs4xdr.c-1832-\tp = xdr_reserve_space(xdr, 8);\n"
}

gemini-3.1-pro-preview

null

null

							input: 8429
							output: 16
							thoughts: 107
						

**Unused Session Data in Liveupdate Operations**

Okay, so I've been digging through this patch and it's looking like `args->session` isn't actually being leveraged in any of the file handler functions. That's a bit of a head-scratcher. Specifically, the patch introduces these new functions: `liveupdate_get_file_incoming` and `liveupdate_get_token_outgoing`. They're *exported*, which usually implies intended use elsewhere, but I can't find a single kernel module or anything that's actually calling them. Moreover, they're adding `session` to `struct liveupdate_file_op_args` and populating it, which raises flags. It's really pointing to a design element that's been implemented but never fully connected to the relevant handlers.

Hold on, I need to make sure I haven't missed something obvious here. Let me quickly do a more comprehensive sweep for instances of either `args.session` or just `session` within any of the other handler functions. Just to be absolutely certain... We have to consider that there might be indirect uses or calls.

{
  "Expression": "\\.session"
}

{
  "Output": "\nFull output is too long, showing 500 out of 2277 lines.\nUse more precise expression if possible.\n\nDocumentation/bpf/libbpf/program_types.rst=18=described in more detail in the footnotes.\n--\nDocumentation/bpf/libbpf/program_types.rst-109-+                                           +----------------------------------------+----------------------------------+-----------+\nDocumentation/bpf/libbpf/program_types.rst:110:|                                           | ``BPF_TRACE_KPROBE_SESSION``           | ``kprobe.session+`` [#kpmulti]_  |           |\nDocumentation/bpf/libbpf/program_types.rst-111-+                                           +----------------------------------------+----------------------------------+-----------+\n--\nDocumentation/bpf/libbpf/program_types.rst-119-+                                           +----------------------------------------+----------------------------------+-----------+\nDocumentation/bpf/libbpf/program_types.rst:120:|                                           | ``BPF_TRACE_UPROBE_SESSION``           | ``uprobe.session+`` [#upmul]_    |           |\nDocumentation/bpf/libbpf/program_types.rst-121-+                                           +                                        +----------------------------------+-----------+\nDocumentation/bpf/libbpf/program_types.rst:122:|                                           |                                        | ``uprobe.session.s+`` [#upmul]_  | Yes       |\nDocumentation/bpf/libbpf/program_types.rst-123-+-------------------------------------------+----------------------------------------+----------------------------------+-----------+\n--\narch/x86/kvm/svm/sev.c=651=static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)\n--\narch/x86/kvm/svm/sev.c-678-\tsession_blob = NULL;\narch/x86/kvm/svm/sev.c:679:\tif (params.session_uaddr) {\narch/x86/kvm/svm/sev.c:680:\t\tsession_blob = psp_copy_user_blob(params.session_uaddr, params.session_len);\narch/x86/kvm/svm/sev.c-681-\t\tif (IS_ERR(session_blob)) {\n--\narch/x86/kvm/svm/sev.c-685-\narch/x86/kvm/svm/sev.c:686:\t\tstart.session_address = __sme_set(__pa(session_blob));\narch/x86/kvm/svm/sev.c:687:\t\tstart.session_len = params.session_len;\narch/x86/kvm/svm/sev.c-688-\t}\n--\narch/x86/kvm/svm/sev.c=1557=__sev_send_start_query_session_length(struct kvm *kvm, struct kvm_sev_cmd *argp,\n--\narch/x86/kvm/svm/sev.c-1566-\narch/x86/kvm/svm/sev.c:1567:\tparams-\u003esession_len = data.session_len;\narch/x86/kvm/svm/sev.c-1568-\tif (copy_to_user(u64_to_user_ptr(argp-\u003edata), params,\n--\narch/x86/kvm/svm/sev.c=1575=static int sev_send_start(struct kvm *kvm, struct kvm_sev_cmd *argp)\n--\narch/x86/kvm/svm/sev.c-1590-\t/* if session_len is zero, userspace wants to query the session length */\narch/x86/kvm/svm/sev.c:1591:\tif (!params.session_len)\narch/x86/kvm/svm/sev.c-1592-\t\treturn __sev_send_start_query_session_length(kvm, argp,\n--\narch/x86/kvm/svm/sev.c-1596-\tif (!params.pdh_cert_uaddr || !params.pdh_cert_len ||\narch/x86/kvm/svm/sev.c:1597:\t    !params.session_uaddr || params.session_len \u003e SEV_FW_BLOB_MAX_SIZE)\narch/x86/kvm/svm/sev.c-1598-\t\treturn -EINVAL;\n--\narch/x86/kvm/svm/sev.c-1600-\t/* allocate the memory to hold the session data blob */\narch/x86/kvm/svm/sev.c:1601:\tsession_data = kzalloc(params.session_len, GFP_KERNEL_ACCOUNT);\narch/x86/kvm/svm/sev.c-1602-\tif (!session_data)\n--\narch/x86/kvm/svm/sev.c-1634-\tdata.amd_certs_len = params.amd_certs_len;\narch/x86/kvm/svm/sev.c:1635:\tdata.session_address = __psp_pa(session_data);\narch/x86/kvm/svm/sev.c:1636:\tdata.session_len = params.session_len;\narch/x86/kvm/svm/sev.c-1637-\tdata.handle = to_kvm_sev_info(kvm)-\u003ehandle;\n--\narch/x86/kvm/svm/sev.c-1640-\narch/x86/kvm/svm/sev.c:1641:\tif (!ret \u0026\u0026 copy_to_user(u64_to_user_ptr(params.session_uaddr),\narch/x86/kvm/svm/sev.c:1642:\t\t\tsession_data, params.session_len)) {\narch/x86/kvm/svm/sev.c-1643-\t\tret = -EFAULT;\n--\narch/x86/kvm/svm/sev.c-1647-\tparams.policy = data.policy;\narch/x86/kvm/svm/sev.c:1648:\tparams.session_len = data.session_len;\narch/x86/kvm/svm/sev.c-1649-\tif (copy_to_user(u64_to_user_ptr(argp-\u003edata), \u0026params,\n--\narch/x86/kvm/svm/sev.c=1789=static int sev_receive_start(struct kvm *kvm, struct kvm_sev_cmd *argp)\n--\narch/x86/kvm/svm/sev.c-1808-\tif (!params.pdh_uaddr || !params.pdh_len ||\narch/x86/kvm/svm/sev.c:1809:\t    !params.session_uaddr || !params.session_len)\narch/x86/kvm/svm/sev.c-1810-\t\treturn -EINVAL;\n--\narch/x86/kvm/svm/sev.c-1815-\narch/x86/kvm/svm/sev.c:1816:\tsession_data = psp_copy_user_blob(params.session_uaddr,\narch/x86/kvm/svm/sev.c:1817:\t\t\tparams.session_len);\narch/x86/kvm/svm/sev.c-1818-\tif (IS_ERR(session_data)) {\n--\narch/x86/kvm/svm/sev.c-1827-\tstart.pdh_cert_len = params.pdh_len;\narch/x86/kvm/svm/sev.c:1828:\tstart.session_address = __psp_pa(session_data);\narch/x86/kvm/svm/sev.c:1829:\tstart.session_len = params.session_len;\narch/x86/kvm/svm/sev.c-1830-\n--\nblock/sed-opal.c=2937=static void opal_lock_check_for_saved_key(struct opal_dev *dev,\n--\nblock/sed-opal.c-2963-\t\t\t\titer-\u003elr == lk_unlk-\u003esession.opal_key.lr \u0026\u0026\nblock/sed-opal.c:2964:\t\t\t\titer-\u003eunlk.session.opal_key.key_len \u003e 0) {\nblock/sed-opal.c-2965-\t\t\tlk_unlk-\u003esession.opal_key.key_len =\nblock/sed-opal.c:2966:\t\t\t\titer-\u003eunlk.session.opal_key.key_len;\nblock/sed-opal.c-2967-\t\t\tmemcpy(lk_unlk-\u003esession.opal_key.key,\nblock/sed-opal.c:2968:\t\t\t\titer-\u003eunlk.session.opal_key.key,\nblock/sed-opal.c:2969:\t\t\t\titer-\u003eunlk.session.opal_key.key_len);\nblock/sed-opal.c-2970-\t\t\tbreak;\n--\nblock/sed-opal.c=3259=bool opal_unlock_from_suspend(struct opal_dev *dev)\n--\nblock/sed-opal.c-3280-\t\t\tpr_debug(\"Failed to unlock LR %hhu with sum %d\\n\",\nblock/sed-opal.c:3281:\t\t\t\t suspend-\u003eunlk.session.opal_key.lr,\nblock/sed-opal.c:3282:\t\t\t\t suspend-\u003eunlk.session.sum);\nblock/sed-opal.c-3283-\t\t\twas_failure = true;\n--\nblock/sed-opal.c-3286-\t\tif (dev-\u003eflags \u0026 OPAL_FL_MBR_ENABLED) {\nblock/sed-opal.c:3287:\t\t\tret = __opal_set_mbr_done(dev, \u0026suspend-\u003eunlk.session.opal_key);\nblock/sed-opal.c-3288-\t\t\tif (ret)\n--\ndrivers/bus/stm32_dbg_bus.c=47=static int stm32_dbg_pta_open_session(u32 *id)\n--\ndrivers/bus/stm32_dbg_bus.c-63-\ndrivers/bus/stm32_dbg_bus.c:64:\t*id = sess_arg.session;\ndrivers/bus/stm32_dbg_bus.c-65-\n--\ndrivers/bus/stm32_dbg_bus.c=74=static int stm32_dbg_bus_grant_access(struct stm32_firewall_controller *ctrl, u32 dbg_profile)\n--\ndrivers/bus/stm32_dbg_bus.c-88-\tinv_arg.func = PTA_CMD_GRANT_DBG_ACCESS;\ndrivers/bus/stm32_dbg_bus.c:89:\tinv_arg.session = session_id;\ndrivers/bus/stm32_dbg_bus.c-90-\tinv_arg.num_params = 1;\n--\ndrivers/char/hw_random/optee-rng.c=73=static size_t get_optee_rng_data(struct optee_rng_private *pvt_data,\n--\ndrivers/char/hw_random/optee-rng.c-86-\tinv_arg.func = TA_CMD_GET_ENTROPY;\ndrivers/char/hw_random/optee-rng.c:87:\tinv_arg.session = pvt_data-\u003esession_id;\ndrivers/char/hw_random/optee-rng.c-88-\tinv_arg.num_params = 4;\n--\ndrivers/char/hw_random/optee-rng.c=176=static int get_optee_rng_info(struct device *dev)\n--\ndrivers/char/hw_random/optee-rng.c-186-\tinv_arg.func = TA_CMD_GET_RNG_INFO;\ndrivers/char/hw_random/optee-rng.c:187:\tinv_arg.session = pvt_data.session_id;\ndrivers/char/hw_random/optee-rng.c-188-\tinv_arg.num_params = 4;\n--\ndrivers/char/hw_random/optee-rng.c=211=static int optee_rng_probe(struct tee_client_device *rng_device)\n--\ndrivers/char/hw_random/optee-rng.c-236-\t}\ndrivers/char/hw_random/optee-rng.c:237:\tpvt_data.session_id = sess_arg.session;\ndrivers/char/hw_random/optee-rng.c-238-\n--\ndrivers/char/hw_random/optee-rng.c-253-out_sess:\ndrivers/char/hw_random/optee-rng.c:254:\ttee_client_close_session(pvt_data.ctx, pvt_data.session_id);\ndrivers/char/hw_random/optee-rng.c-255-out_ctx:\n--\ndrivers/char/hw_random/optee-rng.c=261=static void optee_rng_remove(struct tee_client_device *tee_dev)\ndrivers/char/hw_random/optee-rng.c-262-{\ndrivers/char/hw_random/optee-rng.c:263:\ttee_client_close_session(pvt_data.ctx, pvt_data.session_id);\ndrivers/char/hw_random/optee-rng.c-264-\ttee_client_close_context(pvt_data.ctx);\n--\ndrivers/char/ipmi/ipmi_msghandler.c=4155=static int handle_lan_get_msg_rsp(struct ipmi_smi *intf,\n--\ndrivers/char/ipmi/ipmi_msghandler.c-4177-\tlan_addr.addr_type = IPMI_LAN_ADDR_TYPE;\ndrivers/char/ipmi/ipmi_msghandler.c:4178:\tlan_addr.session_handle = msg-\u003ersp[4];\ndrivers/char/ipmi/ipmi_msghandler.c-4179-\tlan_addr.remote_SWID = msg-\u003ersp[8];\n--\ndrivers/char/tpm/tpm-chip.c=239=static void tpm_dev_release(struct device *dev)\n--\ndrivers/char/tpm/tpm-chip.c-247-\tkfree(chip-\u003ework_space.context_buf);\ndrivers/char/tpm/tpm-chip.c:248:\tkfree(chip-\u003ework_space.session_buf);\ndrivers/char/tpm/tpm-chip.c-249-#ifdef CONFIG_TCG_TPM2_HMAC\n--\ndrivers/char/tpm/tpm2-space.c=306=int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,\n--\ndrivers/char/tpm/tpm2-space.c-320-\t       sizeof(space-\u003econtext_tbl));\ndrivers/char/tpm/tpm2-space.c:321:\tmemcpy(\u0026chip-\u003ework_space.session_tbl, \u0026space-\u003esession_tbl,\ndrivers/char/tpm/tpm2-space.c-322-\t       sizeof(space-\u003esession_tbl));\n--\ndrivers/char/tpm/tpm2-space.c-324-\t       space-\u003ebuf_size);\ndrivers/char/tpm/tpm2-space.c:325:\tmemcpy(chip-\u003ework_space.session_buf, space-\u003esession_buf,\ndrivers/char/tpm/tpm2-space.c-326-\t       space-\u003ebuf_size);\n--\ndrivers/char/tpm/tpm2-space.c=540=int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,\n--\ndrivers/char/tpm/tpm2-space.c-570-\t       sizeof(space-\u003econtext_tbl));\ndrivers/char/tpm/tpm2-space.c:571:\tmemcpy(\u0026space-\u003esession_tbl, \u0026chip-\u003ework_space.session_tbl,\ndrivers/char/tpm/tpm2-space.c-572-\t       sizeof(space-\u003esession_tbl));\n--\ndrivers/char/tpm/tpm2-space.c-574-\t       space-\u003ebuf_size);\ndrivers/char/tpm/tpm2-space.c:575:\tmemcpy(space-\u003esession_buf, chip-\u003ework_space.session_buf,\ndrivers/char/tpm/tpm2-space.c-576-\t       space-\u003ebuf_size);\n--\ndrivers/char/tpm/tpm_ftpm_tee.c=45=static int ftpm_tee_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t bufsiz,\n--\ndrivers/char/tpm/tpm_ftpm_tee.c-69-\t\t.func = FTPM_OPTEE_TA_SUBMIT_COMMAND,\ndrivers/char/tpm/tpm_ftpm_tee.c:70:\t\t.session = pvt_data-\u003esession,\ndrivers/char/tpm/tpm_ftpm_tee.c-71-\t\t.num_params = 4,\n--\ndrivers/char/tpm/tpm_ftpm_tee.c=172=static int ftpm_tee_probe_generic(struct device *dev)\n--\ndrivers/char/tpm/tpm_ftpm_tee.c-208-\t}\ndrivers/char/tpm/tpm_ftpm_tee.c:209:\tpvt_data-\u003esession = sess_arg.session;\ndrivers/char/tpm/tpm_ftpm_tee.c-210-\n--\ndrivers/crypto/bcm/cipher.c=4085=static int generic_cra_init(struct crypto_tfm *tfm,\n--\ndrivers/crypto/bcm/cipher.c-4106-\tatomic_inc(\u0026iproc_priv.stream_count);\ndrivers/crypto/bcm/cipher.c:4107:\tatomic_inc(\u0026iproc_priv.session_count);\ndrivers/crypto/bcm/cipher.c-4108-\n--\ndrivers/crypto/bcm/cipher.c=4196=static void generic_cra_exit(struct crypto_tfm *tfm)\ndrivers/crypto/bcm/cipher.c-4197-{\ndrivers/crypto/bcm/cipher.c:4198:\tatomic_dec(\u0026iproc_priv.session_count);\ndrivers/crypto/bcm/cipher.c-4199-}\n--\ndrivers/crypto/bcm/cipher.c=4337=static void spu_counters_init(void)\n--\ndrivers/crypto/bcm/cipher.c-4341-\ndrivers/crypto/bcm/cipher.c:4342:\tatomic_set(\u0026iproc_priv.session_count, 0);\ndrivers/crypto/bcm/cipher.c-4343-\tatomic_set(\u0026iproc_priv.stream_count, 0);\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c=109=static int virtio_crypto_alg_skcipher_init_session(\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-178-\tif (encrypt)\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:179:\t\tctx-\u003eenc_sess_info.session_id = le64_to_cpu(input-\u003esession_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-180-\telse\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:181:\t\tctx-\u003edec_sess_info.session_id = le64_to_cpu(input-\u003esession_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-182-\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c=190=static int virtio_crypto_alg_skcipher_close_session(\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-217-\tif (encrypt)\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:218:\t\tdestroy_session-\u003esession_id = cpu_to_le64(ctx-\u003eenc_sess_info.session_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-219-\telse\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:220:\t\tdestroy_session-\u003esession_id = cpu_to_le64(ctx-\u003edec_sess_info.session_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-221-\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c=321=__virtio_crypto_skcipher_do_req(struct virtio_crypto_sym_request *vc_sym_req,\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-369-\tif (vc_sym_req-\u003eencrypt) {\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:370:\t\treq_data-\u003eheader.session_id =\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:371:\t\t\tcpu_to_le64(ctx-\u003eenc_sess_info.session_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-372-\t\treq_data-\u003eheader.opcode =\n--\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-374-\t} else {\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:375:\t\treq_data-\u003eheader.session_id =\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c:376:\t\t\tcpu_to_le64(ctx-\u003edec_sess_info.session_id);\ndrivers/crypto/virtio/virtio_crypto_skcipher_algs.c-377-\t\treq_data-\u003eheader.opcode =\n--\ndrivers/firmware/arm_scmi/transports/optee.c=160=static int open_session(struct scmi_optee_agent *agent, u32 *tee_session)\n--\ndrivers/firmware/arm_scmi/transports/optee.c-175-\ndrivers/firmware/arm_scmi/transports/optee.c:176:\t*tee_session = arg.session;\ndrivers/firmware/arm_scmi/transports/optee.c-177-\n--\ndrivers/firmware/arm_scmi/transports/optee.c=186=static int get_capabilities(struct scmi_optee_agent *agent)\n--\ndrivers/firmware/arm_scmi/transports/optee.c-198-\targ.func = PTA_SCMI_CMD_CAPABILITIES;\ndrivers/firmware/arm_scmi/transports/optee.c:199:\targ.session = tee_session;\ndrivers/firmware/arm_scmi/transports/optee.c-200-\targ.num_params = 1;\n--\ndrivers/firmware/arm_scmi/transports/optee.c=225=static int get_channel(struct scmi_optee_channel *channel)\n--\ndrivers/firmware/arm_scmi/transports/optee.c-238-\targ.func = PTA_SCMI_CMD_GET_CHANNEL;\ndrivers/firmware/arm_scmi/transports/optee.c:239:\targ.session = channel-\u003etee_session;\ndrivers/firmware/arm_scmi/transports/optee.c-240-\targ.num_params = 1;\n--\ndrivers/firmware/arm_scmi/transports/optee.c=260=static int invoke_process_smt_channel(struct scmi_optee_channel *channel)\n--\ndrivers/firmware/arm_scmi/transports/optee.c-263-\t\t.func = PTA_SCMI_CMD_PROCESS_SMT_CHANNEL,\ndrivers/firmware/arm_scmi/transports/optee.c:264:\t\t.session = channel-\u003etee_session,\ndrivers/firmware/arm_scmi/transports/optee.c-265-\t\t.num_params = 1,\n--\ndrivers/firmware/arm_scmi/transports/optee.c=283=static int invoke_process_msg_channel(struct scmi_optee_channel *channel, size_t msg_size)\n--\ndrivers/firmware/arm_scmi/transports/optee.c-286-\t\t.func = PTA_SCMI_CMD_PROCESS_MSG_CHANNEL,\ndrivers/firmware/arm_scmi/transports/optee.c:287:\t\t.session = channel-\u003etee_session,\ndrivers/firmware/arm_scmi/transports/optee.c-288-\t\t.num_params = 3,\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c=66=static void prepare_args(int cmd,\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c-73-\targ-\u003efunc = cmd;\ndrivers/firmware/broadcom/tee_bnxt_fw.c:74:\targ-\u003esession = pvt_data.session_id;\ndrivers/firmware/broadcom/tee_bnxt_fw.c-75-\targ-\u003enum_params = MAX_TEE_PARAM_ARRY_MEMB;\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c=184=static int tee_bnxt_fw_probe(struct tee_client_device *bnxt_device)\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c-210-\t}\ndrivers/firmware/broadcom/tee_bnxt_fw.c:211:\tpvt_data.session_id = sess_arg.session;\ndrivers/firmware/broadcom/tee_bnxt_fw.c-212-\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c-226-out_sess:\ndrivers/firmware/broadcom/tee_bnxt_fw.c:227:\ttee_client_close_session(pvt_data.ctx, pvt_data.session_id);\ndrivers/firmware/broadcom/tee_bnxt_fw.c-228-out_ctx:\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c=234=static void tee_bnxt_fw_remove(struct tee_client_device *bnxt_device)\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c-236-\ttee_shm_free(pvt_data.fw_shm_pool);\ndrivers/firmware/broadcom/tee_bnxt_fw.c:237:\ttee_client_close_session(pvt_data.ctx, pvt_data.session_id);\ndrivers/firmware/broadcom/tee_bnxt_fw.c-238-\ttee_client_close_context(pvt_data.ctx);\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c=242=static void tee_bnxt_fw_shutdown(struct tee_client_device *bnxt_device)\n--\ndrivers/firmware/broadcom/tee_bnxt_fw.c-244-\ttee_shm_free(pvt_data.fw_shm_pool);\ndrivers/firmware/broadcom/tee_bnxt_fw.c:245:\ttee_client_close_session(pvt_data.ctx, pvt_data.session_id);\ndrivers/firmware/broadcom/tee_bnxt_fw.c-246-\ttee_client_close_context(pvt_data.ctx);\n--\ndrivers/firmware/efi/stmm/tee_stmm_efi.c=51=static efi_status_t tee_mm_communicate(void *comm_buf, size_t dsize)\n--\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-76-\targ.func = PTA_STMM_CMD_COMMUNICATE;\ndrivers/firmware/efi/stmm/tee_stmm_efi.c:77:\targ.session = pvt_data.session;\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-78-\targ.num_params = 4;\n--\ndrivers/firmware/efi/stmm/tee_stmm_efi.c=511=static void tee_stmm_efi_close_session(void *data)\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-512-{\ndrivers/firmware/efi/stmm/tee_stmm_efi.c:513:\ttee_client_close_session(pvt_data.ctx, pvt_data.session);\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-514-}\n--\ndrivers/firmware/efi/stmm/tee_stmm_efi.c=531=static int tee_stmm_efi_probe(struct tee_client_device *tee_dev)\n--\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-554-\t}\ndrivers/firmware/efi/stmm/tee_stmm_efi.c:555:\tpvt_data.session = sess_arg.session;\ndrivers/firmware/efi/stmm/tee_stmm_efi.c-556-\tpvt_data.dev = dev;\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c=1635=static void psp_prep_ta_unload_cmd_buf(struct psp_gfx_cmd_resp *cmd,\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1638-\tcmd-\u003ecmd_id = GFX_CMD_ID_UNLOAD_TA;\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:1639:\tcmd-\u003ecmd.cmd_unload_ta.session_id = session_id;\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1640-}\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c=1735=static void psp_prep_ta_invoke_cmd_buf(struct psp_gfx_cmd_resp *cmd,\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1739-\tcmd-\u003ecmd_id\t\t\t\t= GFX_CMD_ID_INVOKE_CMD;\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:1740:\tcmd-\u003ecmd.cmd_invoke_cmd.session_id\t= session_id;\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1741-\tcmd-\u003ecmd.cmd_invoke_cmd.ta_cmd_id\t= ta_cmd_id;\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c=1763=int psp_ta_load(struct psp_context *psp, struct ta_context *context)\n--\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1789-\tif (!ret)\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:1790:\t\tcontext-\u003esession_id = cmd-\u003eresp.session_id;\ndrivers/gpu/drm/amd/amdgpu/amdgpu_psp.c-1791-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=252=enum mod_hdcp_status mod_hdcp_hdcp1_create_session(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-277-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:278:\thdcp-\u003eauth.id = hdcp_cmd-\u003eout_msg.hdcp1_create_session.session_handle;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-279-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=294=enum mod_hdcp_status mod_hdcp_hdcp1_destroy_session(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-305-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:306:\thdcp_cmd-\u003ein_msg.hdcp1_destroy_session.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-307-\thdcp_cmd-\u003ecmd_id = TA_HDCP_COMMAND__HDCP1_DESTROY_SESSION;\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=328=enum mod_hdcp_status mod_hdcp_hdcp1_validate_rx(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-337-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:338:\thdcp_cmd-\u003ein_msg.hdcp1_first_part_authentication.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-339-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=369=enum mod_hdcp_status mod_hdcp_hdcp1_enable_encryption(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-382-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:383:\thdcp_cmd-\u003ein_msg.hdcp1_enable_encryption.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-384-\thdcp_cmd-\u003ecmd_id = TA_HDCP_COMMAND__HDCP1_ENABLE_ENCRYPTION;\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=399=enum mod_hdcp_status mod_hdcp_hdcp1_validate_ksvlist_vp(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-408-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:409:\thdcp_cmd-\u003ein_msg.hdcp1_second_part_authentication.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-410-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=440=enum mod_hdcp_status mod_hdcp_hdcp1_enable_dp_stream_encryption(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-457-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:458:\t\thdcp_cmd-\u003ein_msg.hdcp1_enable_dp_stream_encryption.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-459-\t\thdcp_cmd-\u003ein_msg.hdcp1_enable_dp_stream_encryption.display_handle = hdcp-\u003edisplays[i].index;\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=477=enum mod_hdcp_status mod_hdcp_hdcp1_link_maintenance(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-487-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:488:\thdcp_cmd-\u003ein_msg.hdcp1_get_encryption_status.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-489-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=503=enum mod_hdcp_status mod_hdcp_hdcp2_create_session(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-543-\telse\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:544:\t\thdcp-\u003eauth.id = hdcp_cmd-\u003eout_msg.hdcp2_create_session_v2.session_handle;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-545-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=550=enum mod_hdcp_status mod_hdcp_hdcp2_destroy_session(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-560-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:561:\thdcp_cmd-\u003ein_msg.hdcp2_destroy_session.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-562-\thdcp_cmd-\u003ecmd_id = TA_HDCP_COMMAND__HDCP2_DESTROY_SESSION;\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=834=enum mod_hdcp_status mod_hdcp_hdcp2_enable_encryption(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-848-\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:849:\thdcp_cmd-\u003ein_msg.hdcp2_set_encryption.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-850-\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c=918=enum mod_hdcp_status mod_hdcp_hdcp2_enable_dp_stream_encryption(struct mod_hdcp *hdcp)\n--\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-939-\t\thdcp_cmd-\u003ein_msg.hdcp2_enable_dp_stream_encryption.display_handle = hdcp-\u003edisplays[i].index;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c:940:\t\thdcp_cmd-\u003ein_msg.hdcp2_enable_dp_stream_encryption.session_handle = hdcp-\u003eauth.id;\ndrivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c-941-\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c=52=static int ras_psp_sync_system_ras_psp_status(struct ras_core_context *ras_core)\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-67-\t\t\tta_ctx-\u003eras_ta_initialized = status.initialized;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c:68:\t\t\tta_ctx-\u003esession_id = status.session_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-69-\t\t}\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c=242=static int send_psp_cmd(struct ras_core_context *ras_core,\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-308-\tresp-\u003estatus = gfx_cmd-\u003eresp.status;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c:309:\tresp-\u003esession_id = gfx_cmd-\u003eresp.session_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-310-\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c=354=static int send_ras_ta_runtime_cmd(struct ras_core_context *ras_core,\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-390-\tinvoke_cmd.ta_cmd_id = cmd_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c:391:\tinvoke_cmd.session_id = ta_ctx-\u003esession_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-392-\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c=465=static int send_load_ta_fw_cmd(struct ras_core_context *ras_core,\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-530-\t\tta_ctx-\u003eta_version = fw_hdr-\u003eimage_version;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c:531:\t\tta_ctx-\u003esession_id = resp.session_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-532-\t\tta_ctx-\u003eras_ta_initialized = true;\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c=567=static int unload_ras_ta_firmware(struct ras_core_context *ras_core,\n--\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-577-\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c:578:\tcmd_unload_ta.session_id = ta_ctx-\u003esession_id;\ndrivers/gpu/drm/amd/ras/rascore/ras_psp.c-579-\tret = send_psp_cmd(ras_core, GFX_CMD_ID_UNLOAD_TA,\n--\ndrivers/gpu/drm/i915/pxp/intel_pxp_tee.c=330=int intel_pxp_tee_cmd_create_arb_session(struct intel_pxp *pxp,\n--\ndrivers/gpu/drm/i915/pxp/intel_pxp_tee.c-341-\tmsg_in.protection_mode = PXP42_ARB_SESSION_MODE_HEAVY;\ndrivers/gpu/drm/i915/pxp/intel_pxp_tee.c:342:\tmsg_in.session_id = arb_session_id;\ndrivers/gpu/drm/i915/pxp/intel_pxp_tee.c-343-\n--\ndrivers/infiniband/ulp/iser/iscsi_iser.c=973=static struct iscsi_transport iscsi_iser_transport = {\n--\ndrivers/infiniband/ulp/iser/iscsi_iser.c-1003-\t/* recovery */\ndrivers/infiniband/ulp/iser/iscsi_iser.c:1004:\t.session_recovery_timedout = iscsi_session_recovery_timedout,\ndrivers/infiniband/ulp/iser/iscsi_iser.c-1005-\n--\ndrivers/md/dm-vdo/dedupe.c=2349=static int __must_check initialize_zone(struct vdo *vdo, struct hash_zones *zones,\n--\ndrivers/md/dm-vdo/dedupe.c-2386-\t\tcontext-\u003erequest.callback = finish_index_operation;\ndrivers/md/dm-vdo/dedupe.c:2387:\t\tcontext-\u003erequest.session = zones-\u003eindex_session;\ndrivers/md/dm-vdo/dedupe.c-2388-\t\tlist_add(\u0026context-\u003elist_entry, \u0026zone-\u003eavailable);\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=92=static int iris_hfi_gen1_session_open(struct iris_inst *inst)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-114-\tpacket.shdr.hdr.pkt_type = HFI_CMD_SYS_SESSION_INIT;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:115:\tpacket.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-116-\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-117-\tif (inst-\u003edomain == DECODER)\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:118:\t\tpacket.session_domain = HFI_SESSION_TYPE_DEC;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-119-\telse\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:120:\t\tpacket.session_domain = HFI_SESSION_TYPE_ENC;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-121-\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:122:\tpacket.session_codec = codec;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-123-\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=133=static void iris_hfi_gen1_packet_session_cmd(struct iris_inst *inst,\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-138-\tpacket-\u003eshdr.hdr.pkt_type = ptype;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:139:\tpacket-\u003eshdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-140-}\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=188=static int iris_hfi_gen1_session_stop(struct iris_inst *inst, u32 plane)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-206-\t\t\tflush_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_FLUSH;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:207:\t\t\tflush_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-208-\t\t\tflush_pkt.flush_type = flush_type;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=274=static int iris_hfi_gen1_queue_input_buffer(struct iris_inst *inst, struct iris_buffer *buf)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-281-\t\tcom_ip_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_EMPTY_BUFFER;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:282:\t\tcom_ip_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-283-\t\tcom_ip_pkt.time_stamp_hi = upper_32_bits(buf-\u003etimestamp);\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-298-\t\tuncom_ip_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_EMPTY_BUFFER;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:299:\t\tuncom_ip_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-300-\t\tuncom_ip_pkt.time_stamp_hi = upper_32_bits(buf-\u003etimestamp);\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=316=static int iris_hfi_gen1_queue_output_buffer(struct iris_inst *inst, struct iris_buffer *buf)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-321-\top_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_FILL_BUFFER;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:322:\top_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-323-\top_pkt.output_tag = buf-\u003eindex;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=339=static int iris_hfi_gen1_queue_internal_buffer(struct iris_inst *inst, struct iris_buffer *buf)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-351-\tint_pkt-\u003eshdr.hdr.pkt_type = HFI_CMD_SESSION_SET_BUFFERS;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:352:\tint_pkt-\u003eshdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-353-\tint_pkt-\u003ebuffer_size = buf-\u003ebuffer_size;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=394=static int iris_hfi_gen1_session_unset_buffers(struct iris_inst *inst, struct iris_buffer *buf)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-412-\tpkt-\u003eshdr.hdr.pkt_type = HFI_CMD_SESSION_RELEASE_BUFFERS;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:413:\tpkt-\u003eshdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-414-\tpkt-\u003ebuffer_size = buf-\u003ebuffer_size;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=453=static int iris_hfi_gen1_session_drain(struct iris_inst *inst, u32 plane)\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-459-\t\tip_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_EMPTY_BUFFER;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:460:\t\tip_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-461-\t\tip_pkt.flags = HFI_BUFFERFLAG_EOS;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-471-\t\tip_pkt.shdr.hdr.pkt_type = HFI_CMD_SESSION_EMPTY_BUFFER;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:472:\t\tip_pkt.shdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-473-\t\tip_pkt.flags = HFI_BUFFERFLAG_EOS;\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c=483=iris_hfi_gen1_packet_session_set_property(struct hfi_session_set_property_pkt *packet,\n--\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-489-\tpacket-\u003eshdr.hdr.pkt_type = HFI_CMD_SESSION_SET_PROPERTY;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c:490:\tpacket-\u003eshdr.session_id = inst-\u003esession_id;\ndrivers/media/platform/qcom/iris/iris_hfi_gen1_command.c-491-\tpacket-\u003enum_properties = 1;\n--\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 22541
							output: 17
							thoughts: 39
						

Okay, here's my interpretation of that thought process, summarized as you requested:

**Refining the Search Strategy**

Hmm, I see I was initially too broad with my search for `\.session`. That pattern, of course, would match not just the specific variable or key I'm interested in, but *any* instance of `.session`, like in something with a general structure. So that initial search might have yielded irrelevant results. I need to be more precise. Let's try narrowing it down. My objective is to find instances that explicitly relate to `args.session`, or perhaps an equivalent structure accessed with `->`. Therefore, I'll revise my search to specifically look for `args\.session` or `args->session`. That should provide more focused and relevant results.

{
  "Expression": "args\\.session"
}

{
  "Output": "fs/nfs/nfs4proc.c=8454=int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,\n--\nfs/nfs/nfs4proc.c-8481-\nfs/nfs/nfs4proc.c:8482:\tnfs4_copy_sessionid(\u0026args.sessionid, \u0026clp-\u003ecl_session-\u003esess_id);\nfs/nfs/nfs4proc.c-8483-\tif (!(clp-\u003ecl_session-\u003eflags \u0026 SESSION4_BACK_CHAN))\n--\nkernel/liveupdate/luo_file.c=230=int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd)\n--\nkernel/liveupdate/luo_file.c-286-\targs.handler = fh;\nkernel/liveupdate/luo_file.c:287:\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-288-\targs.file = file;\n--\nkernel/liveupdate/luo_file.c=334=void luo_file_unpreserve_files(struct luo_file_set *file_set)\n--\nkernel/liveupdate/luo_file.c-344-\t\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:345:\t\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-346-\t\targs.file = luo_file-\u003efile;\n--\nkernel/liveupdate/luo_file.c=368=static int luo_file_freeze_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-378-\t\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:379:\t\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-380-\t\targs.file = luo_file-\u003efile;\n--\nkernel/liveupdate/luo_file.c=392=static void luo_file_unfreeze_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-400-\t\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:401:\t\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-402-\t\targs.file = luo_file-\u003efile;\n--\nkernel/liveupdate/luo_file.c=556=int luo_retrieve_file(struct luo_file_set *file_set, u64 token,\n--\nkernel/liveupdate/luo_file.c-593-\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:594:\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-595-\targs.serialized_data = luo_file-\u003eserialized_data;\n--\nkernel/liveupdate/luo_file.c=617=static int luo_file_can_finish_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-627-\t\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:628:\t\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-629-\t\targs.file = luo_file-\u003efile;\n--\nkernel/liveupdate/luo_file.c=638=static void luo_file_finish_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-645-\targs.handler = luo_file-\u003efh;\nkernel/liveupdate/luo_file.c:646:\targs.session = luo_session_from_file_set(file_set);\nkernel/liveupdate/luo_file.c-647-\targs.file = luo_file-\u003efile;\n"
}

gemini-3.1-pro-preview

null

null

							input: 23897
							output: 23
							thoughts: 167
						

**Analyzing the "Liveupdate" Patch**

Okay, let me break this down. It looks like this patch introduces a `session` field to the `struct liveupdate_file_op_args`. Right now, my initial read is that none of the existing file handlers are actually *using* either `args->session` or `args.session`. I see the addition of this field, the population within `luo_file.c`, and the addition of `liveupdate_get_file_incoming` and `liveupdate_get_token_outgoing`, which are exported, but seem unused. So, the patch, at this point, appears to be dead code, or maybe an API hook for some future implementation. It doesn't modify any current behavior or execution flow in any way.

Just to be absolutely sure, I'll quickly double-check the kernel code for any existing file handlers and their access of a `session` variable without the `args.` or `args->` scope to see if this is related to some other change. I want to rule out the possibility of missing an indirect usage of the new member. I need to focus on that `struct liveupdate_file_op_args` structure. Let's see what's actually in those file handler definitions...

{
  "Expression": "struct liveupdate_file_op_args"
}

{
  "Output": "include/linux/liveupdate.h=23=struct file;\n--\ninclude/linux/liveupdate.h-25-/**\ninclude/linux/liveupdate.h:26: * struct liveupdate_file_op_args - Arguments for file operation callbacks.\ninclude/linux/liveupdate.h-27- * @handler:          The file handler being called.\n--\ninclude/linux/liveupdate.h-46- */\ninclude/linux/liveupdate.h:47:struct liveupdate_file_op_args {\ninclude/linux/liveupdate.h-48-\tstruct liveupdate_file_handler *handler;\n--\ninclude/linux/liveupdate.h-73- * All operations (except can_preserve) receive a pointer to a\ninclude/linux/liveupdate.h:74: * 'struct liveupdate_file_op_args' containing the necessary context.\ninclude/linux/liveupdate.h-75- */\ninclude/linux/liveupdate.h=76=struct liveupdate_file_ops {\n--\ninclude/linux/liveupdate.h-78-\t\t\t     struct file *file);\ninclude/linux/liveupdate.h:79:\tint (*preserve)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:80:\tvoid (*unpreserve)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:81:\tint (*freeze)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:82:\tvoid (*unfreeze)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:83:\tint (*retrieve)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:84:\tbool (*can_finish)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h:85:\tvoid (*finish)(struct liveupdate_file_op_args *args);\ninclude/linux/liveupdate.h-86-\tunsigned long (*get_id)(struct file *file);\n--\nkernel/liveupdate/luo_file.c=230=int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd)\nkernel/liveupdate/luo_file.c-231-{\nkernel/liveupdate/luo_file.c:232:\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-233-\tstruct liveupdate_file_handler *fh;\n--\nkernel/liveupdate/luo_file.c=334=void luo_file_unpreserve_files(struct luo_file_set *file_set)\n--\nkernel/liveupdate/luo_file.c-338-\twhile (!list_empty(\u0026file_set-\u003efiles_list)) {\nkernel/liveupdate/luo_file.c:339:\t\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-340-\n--\nkernel/liveupdate/luo_file.c=368=static int luo_file_freeze_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-375-\tif (luo_file-\u003efh-\u003eops-\u003efreeze) {\nkernel/liveupdate/luo_file.c:376:\t\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-377-\n--\nkernel/liveupdate/luo_file.c=392=static void luo_file_unfreeze_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-397-\tif (luo_file-\u003efh-\u003eops-\u003eunfreeze) {\nkernel/liveupdate/luo_file.c:398:\t\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-399-\n--\nkernel/liveupdate/luo_file.c=556=int luo_retrieve_file(struct luo_file_set *file_set, u64 token,\n--\nkernel/liveupdate/luo_file.c-558-{\nkernel/liveupdate/luo_file.c:559:\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-560-\tstruct luo_file *luo_file;\n--\nkernel/liveupdate/luo_file.c=617=static int luo_file_can_finish_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-624-\tif (luo_file-\u003efh-\u003eops-\u003ecan_finish) {\nkernel/liveupdate/luo_file.c:625:\t\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-626-\n--\nkernel/liveupdate/luo_file.c=638=static void luo_file_finish_one(struct luo_file_set *file_set,\n--\nkernel/liveupdate/luo_file.c-640-{\nkernel/liveupdate/luo_file.c:641:\tstruct liveupdate_file_op_args args = {0};\nkernel/liveupdate/luo_file.c-642-\n--\nmm/memfd_luo.c=231=static void memfd_luo_unpreserve_folios(struct kho_vmalloc *kho_vmalloc,\n--\nmm/memfd_luo.c-257-\nmm/memfd_luo.c:258:static int memfd_luo_preserve(struct liveupdate_file_op_args *args)\nmm/memfd_luo.c-259-{\n--\nmm/memfd_luo.c-323-\nmm/memfd_luo.c:324:static int memfd_luo_freeze(struct liveupdate_file_op_args *args)\nmm/memfd_luo.c-325-{\n--\nmm/memfd_luo.c-341-\nmm/memfd_luo.c:342:static void memfd_luo_unpreserve(struct liveupdate_file_op_args *args)\nmm/memfd_luo.c-343-{\n--\nmm/memfd_luo.c=362=static void memfd_luo_discard_folios(const struct memfd_luo_folio_ser *folios_ser,\n--\nmm/memfd_luo.c-386-\nmm/memfd_luo.c:387:static void memfd_luo_finish(struct liveupdate_file_op_args *args)\nmm/memfd_luo.c-388-{\n--\nmm/memfd_luo.c=417=static int memfd_luo_retrieve_folios(struct file *file,\n--\nmm/memfd_luo.c-517-\nmm/memfd_luo.c:518:static int memfd_luo_retrieve(struct liveupdate_file_op_args *args)\nmm/memfd_luo.c-519-{\n"
}

gemini-3.1-pro-preview

null

null

							input: 26204
							output: 30
							thoughts: 28
						

Okay, here's my interpretation of those thoughts, presented as my own mental process, keeping in mind I'm an expert in this field.

**Deep Dive into `mm/memfd_luo.c` and its Connection to Session Arguments**

Alright, the objective here is pretty focused. We're looking at the sole file handler, `mm/memfd_luo.c`. That’s a good starting point, keeps the scope manageable. The crucial question immediately pops into my head: does this handler, the one and only for this task, actually leverage `args->session`? That's the key variable we're interested in, the central piece of this puzzle. It's the immediate question I have.

no matches

{
  "Expression": "session",
  "PathPrefix": "mm/memfd_luo.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 26431
							output: 143
							thoughts: 127
						

**Unused API in a Liveupdate Context**

Okay, so I've looked at this patch and, frankly, it's a bit of a head-scratcher. It appears to be adding a new `session` field to the `struct liveupdate_file_op_args` structure. Alongside that, we've got two new functions, `liveupdate_get_file_incoming` and `liveupdate_get_token_outgoing`. Both of these are exported, which means they're technically available for other kernel modules to call. However, and here's the kicker, *they aren't actually used anywhere within the kernel code*. Nowhere!

The `session` field itself, as far as I can see, is also populated but completely ignored by any of the existing file handlers. It's just...there. It seems like someone went through the effort of adding all this new API and data structure modification, but completely neglected to *use* any of it.

Given all of this, my professional assessment is that this patch doesn't introduce any new functionality that's subject to fuzzing. It's simply creating unused API and fields. So, I'm going to have to flag this one as `WorthFuzzing=false`. It doesn't present any immediate attack surface or change to the existing behavior.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch adds a new 'session' field to 'struct liveupdate_file_op_args' and two new exported functions 'liveupdate_get_file_incoming' and 'liveupdate_get_token_outgoing'. However, the new functions are not called anywhere in the kernel, and the new 'session' field is populated but never read by any file handler (e.g., in mm/memfd_luo.c). Thus, the patch introduces unused API and dead code, making no functional changes to the execution flow.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds a new 'session' field to 'struct liveupdate_file_op_args' and two new exported functions 'liveupdate_get_file_incoming' and 'liveupdate_get_token_outgoing'. However, the new functions are not called anywhere in the kernel, and the new 'session' field is populated but never read by any file handler (e.g., in mm/memfd_luo.c). Thus, the patch introduces unused API and dead code, making no functional changes to the execution flow.",
  "WorthFuzzing": false
}