AI Trajectory

null

{
  "EnableConfigs": [
    "OCFS2_FS"
  ],
  "FocusSymbols": [
    "ocfs2_mknod",
    "ocfs2_acl_init_prepare",
    "ocfs2_init_acl",
    "ocfs2_calc_xattr_init",
    "ocfs2_init_security_and_acl"
  ],
  "Reasoning": "The patch modifies the ACL initialization logic in OCFS2 during inode creation (e.g., mkdir, mknod, create, and reflink). It introduces `ocfs2_acl_init_prepare` to fetch and prepare ACLs before calculating xattr credits, altering the core execution flow and lock ordering. This is a functional change that should be fuzzed to ensure no regressions or new deadlocks are introduced.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit eb212125809b8b2dbe3334f7d12d6e5f9df359a5\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Tue Jul 21 11:02:39 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c\nindex af1e2cedb217f1..1c45993e34b005 100644\n--- a/fs/ocfs2/acl.c\n+++ b/fs/ocfs2/acl.c\n@@ -110,8 +110,7 @@ static void *ocfs2_acl_to_xattr(const struct posix_acl *acl, size_t *size)\n \treturn ocfs2_acl;\n }\n \n-static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode,\n-\t\t\t\t\t      int type,\n+static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode, int type,\n \t\t\t\t\t      struct buffer_head *di_bh)\n {\n \tint name_index;\n@@ -349,63 +348,98 @@ int ocfs2_acl_chmod(struct inode *inode, struct buffer_head *bh)\n  * Initialize the ACLs of a new inode. If parent directory has default ACL,\n  * then clone to new inode. Called from ocfs2_mknod.\n  */\n-int ocfs2_init_acl(handle_t *handle,\n-\t\t   struct inode *inode,\n-\t\t   struct inode *dir,\n-\t\t   struct buffer_head *di_bh,\n-\t\t   struct buffer_head *dir_bh,\n-\t\t   struct ocfs2_alloc_context *meta_ac,\n-\t\t   struct ocfs2_alloc_context *data_ac)\n+int ocfs2_acl_init_prepare(struct inode *inode, struct inode *dir,\n+\t\t\t   struct buffer_head *dir_bh,\n+\t\t\t   struct ocfs2_acl_state *state)\n {\n \tstruct ocfs2_super *osb = OCFS2_SB(inode-\u003ei_sb);\n-\tstruct posix_acl *acl = NULL;\n-\tint ret = 0, ret2;\n-\tumode_t mode;\n-\n-\tif (!S_ISLNK(inode-\u003ei_mode)) {\n-\t\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n-\t\t\tdown_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n-\t\t\tacl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,\n-\t\t\t\t\t\t   dir_bh);\n-\t\t\tup_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n-\t\t\tif (IS_ERR(acl))\n-\t\t\t\treturn PTR_ERR(acl);\n+\tint ret = 0;\n+\n+\tstate-\u003edefault_acl = NULL;\n+\tstate-\u003eacl = NULL;\n+\tstate-\u003emode = inode-\u003ei_mode;\n+\n+\tif (S_ISLNK(inode-\u003ei_mode))\n+\t\treturn 0;\n+\n+\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n+\t\tdown_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n+\t\tstate-\u003edefault_acl =\n+\t\t\tocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT, dir_bh);\n+\t\tup_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n+\t\tif (IS_ERR(state-\u003edefault_acl)) {\n+\t\t\tret = PTR_ERR(state-\u003edefault_acl);\n+\t\t\tstate-\u003edefault_acl = NULL;\n+\t\t\treturn ret;\n \t\t}\n-\t\tif (!acl) {\n-\t\t\tmode = inode-\u003ei_mode \u0026 ~current_umask();\n-\t\t\tret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);\n-\t\t\tif (ret) {\n-\t\t\t\tmlog_errno(ret);\n-\t\t\t\tgoto cleanup;\n+\t\tif (state-\u003edefault_acl) {\n+\t\t\tstate-\u003eacl = posix_acl_dup(state-\u003edefault_acl);\n+\t\t\tif (!state-\u003eacl)\n+\t\t\t\treturn -ENOMEM;\n+\t\t\tret = __posix_acl_create(\u0026state-\u003eacl, GFP_NOFS,\n+\t\t\t\t\t\t \u0026state-\u003emode);\n+\t\t\tif (ret \u003c 0)\n+\t\t\t\treturn ret;\n+\t\t\tif (ret == 0) {\n+\t\t\t\tposix_acl_release(state-\u003eacl);\n+\t\t\t\tstate-\u003eacl = NULL;\n+\t\t\t}\n+\t\t\tif (!S_ISDIR(inode-\u003ei_mode)) {\n+\t\t\t\tposix_acl_release(state-\u003edefault_acl);\n+\t\t\t\tstate-\u003edefault_acl = NULL;\n \t\t\t}\n+\t\t} else {\n+\t\t\tstate-\u003emode \u0026= ~current_umask();\n \t\t}\n+\t} else {\n+\t\tstate-\u003emode \u0026= ~current_umask();\n \t}\n-\tif ((osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) \u0026\u0026 acl) {\n-\t\tif (S_ISDIR(inode-\u003ei_mode)) {\n+\n+\treturn 0;\n+}\n+\n+void ocfs2_acl_init_release(struct ocfs2_acl_state *state)\n+{\n+\tposix_acl_release(state-\u003edefault_acl);\n+\tposix_acl_release(state-\u003eacl);\n+}\n+\n+int ocfs2_init_acl(handle_t *handle, struct inode *inode,\n+\t\t   struct buffer_head *di_bh,\n+\t\t   struct ocfs2_alloc_context *meta_ac,\n+\t\t   struct ocfs2_alloc_context *data_ac,\n+\t\t   struct ocfs2_acl_state *state)\n+{\n+\tstruct ocfs2_super *osb = OCFS2_SB(inode-\u003ei_sb);\n+\tint ret = 0;\n+\n+\tif (S_ISLNK(inode-\u003ei_mode))\n+\t\treturn 0;\n+\n+\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n+\t\tif (S_ISDIR(inode-\u003ei_mode) \u0026\u0026 state-\u003edefault_acl) {\n \t\t\tret = ocfs2_set_acl(handle, inode, di_bh,\n-\t\t\t\t\t    ACL_TYPE_DEFAULT, acl,\n-\t\t\t\t\t    meta_ac, data_ac);\n+\t\t\t\t\t    ACL_TYPE_DEFAULT,\n+\t\t\t\t\t    state-\u003edefault_acl, meta_ac,\n+\t\t\t\t\t    data_ac);\n \t\t\tif (ret)\n-\t\t\t\tgoto cleanup;\n+\t\t\t\treturn ret;\n \t\t}\n-\t\tmode = inode-\u003ei_mode;\n-\t\tret = __posix_acl_create(\u0026acl, GFP_NOFS, \u0026mode);\n-\t\tif (ret \u003c 0)\n-\t\t\treturn ret;\n+\t}\n \n-\t\tret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);\n-\t\tif (ret2) {\n-\t\t\tmlog_errno(ret2);\n-\t\t\tret = ret2;\n-\t\t\tgoto cleanup;\n-\t\t}\n-\t\tif (ret \u003e 0) {\n-\t\t\tret = ocfs2_set_acl(handle, inode,\n-\t\t\t\t\t    di_bh, ACL_TYPE_ACCESS,\n-\t\t\t\t\t    acl, meta_ac, data_ac);\n+\tret = ocfs2_acl_set_mode(inode, di_bh, handle, state-\u003emode);\n+\tif (ret) {\n+\t\tmlog_errno(ret);\n+\t\treturn ret;\n+\t}\n+\n+\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n+\t\tif (state-\u003eacl) {\n+\t\t\tret = ocfs2_set_acl(handle, inode, di_bh,\n+\t\t\t\t\t    ACL_TYPE_ACCESS, state-\u003eacl,\n+\t\t\t\t\t    meta_ac, data_ac);\n \t\t}\n \t}\n-cleanup:\n-\tposix_acl_release(acl);\n+\n \treturn ret;\n }\ndiff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h\nindex 667c6f03fa606f..a91f9ce278d6d3 100644\n--- a/fs/ocfs2/acl.h\n+++ b/fs/ocfs2/acl.h\n@@ -20,9 +20,20 @@ struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, bool rcu);\n int ocfs2_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,\n \t\t      struct posix_acl *acl, int type);\n extern int ocfs2_acl_chmod(struct inode *, struct buffer_head *);\n-extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *,\n-\t\t\t  struct buffer_head *, struct buffer_head *,\n-\t\t\t  struct ocfs2_alloc_context *,\n-\t\t\t  struct ocfs2_alloc_context *);\n+struct ocfs2_acl_state {\n+\tstruct posix_acl *default_acl;\n+\tstruct posix_acl *acl;\n+\tumode_t mode;\n+};\n+\n+int ocfs2_acl_init_prepare(struct inode *inode, struct inode *dir,\n+\t\t\t   struct buffer_head *dir_bh,\n+\t\t\t   struct ocfs2_acl_state *state);\n+void ocfs2_acl_init_release(struct ocfs2_acl_state *state);\n+int ocfs2_init_acl(handle_t *handle, struct inode *inode,\n+\t\t   struct buffer_head *di_bh,\n+\t\t   struct ocfs2_alloc_context *meta_ac,\n+\t\t   struct ocfs2_alloc_context *data_ac,\n+\t\t   struct ocfs2_acl_state *state);\n \n #endif /* OCFS2_ACL_H */\ndiff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c\nindex 1277666c77cd2d..1d492f3591bebe 100644\n--- a/fs/ocfs2/namei.c\n+++ b/fs/ocfs2/namei.c\n@@ -256,6 +256,7 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,\n \tsigset_t oldset;\n \tint did_block_signals = 0;\n \tstruct ocfs2_dentry_lock *dl = NULL;\n+\tstruct ocfs2_acl_state acl_state;\n \n \ttrace_ocfs2_mknod(dir, dentry, dentry-\u003ed_name.len, dentry-\u003ed_name.name,\n \t\t\t  (unsigned long long)OCFS2_I(dir)-\u003eip_blkno,\n@@ -330,10 +331,13 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,\n \t\t}\n \t}\n \n+\tstatus = ocfs2_acl_init_prepare(inode, dir, parent_fe_bh, \u0026acl_state);\n+\tif (status \u003c 0)\n+\t\tgoto leave;\n+\n \t/* calculate meta data/clusters for setting security and acl xattr */\n-\tstatus = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,\n-\t\t\t\t       \u0026si, \u0026want_clusters,\n-\t\t\t\t       \u0026xattr_credits, \u0026want_meta);\n+\tstatus = ocfs2_calc_xattr_init(dir, mode, \u0026si, \u0026want_clusters,\n+\t\t\t\t       \u0026xattr_credits, \u0026want_meta, \u0026acl_state);\n \tif (status \u003c 0) {\n \t\tmlog_errno(status);\n \t\tgoto leave;\n@@ -411,8 +415,8 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,\n \t\tinc_nlink(dir);\n \t}\n \n-\tstatus = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,\n-\t\t\t meta_ac, data_ac);\n+\tstatus = ocfs2_init_acl(handle, inode, new_fe_bh, meta_ac, data_ac,\n+\t\t\t\t\u0026acl_state);\n \n \tif (status \u003c 0) {\n \t\tmlog_errno(status);\n@@ -477,6 +481,8 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,\n \tbrelse(parent_fe_bh);\n \tkfree(si.value);\n \n+\tocfs2_acl_init_release(\u0026acl_state);\n+\n \tocfs2_free_dir_lookup_result(\u0026lookup);\n \n \tif (inode_ac)\ndiff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c\nindex fcddd3c13acddd..25e52633cea287 100644\n--- a/fs/ocfs2/xattr.c\n+++ b/fs/ocfs2/xattr.c\n@@ -611,13 +611,10 @@ int ocfs2_calc_security_init(struct inode *dir,\n \treturn ret;\n }\n \n-int ocfs2_calc_xattr_init(struct inode *dir,\n-\t\t\t  struct buffer_head *dir_bh,\n-\t\t\t  umode_t mode,\n+int ocfs2_calc_xattr_init(struct inode *dir, umode_t mode,\n \t\t\t  struct ocfs2_security_xattr_info *si,\n-\t\t\t  int *want_clusters,\n-\t\t\t  int *xattr_credits,\n-\t\t\t  int *want_meta)\n+\t\t\t  int *want_clusters, int *xattr_credits,\n+\t\t\t  int *want_meta, struct ocfs2_acl_state *acl_state)\n {\n \tint ret = 0;\n \tstruct ocfs2_super *osb = OCFS2_SB(dir-\u003ei_sb);\n@@ -628,19 +625,15 @@ int ocfs2_calc_xattr_init(struct inode *dir,\n \t\t\t\t\t\t     si-\u003evalue_len);\n \n \tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n-\t\tdown_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n-\t\tacl_len = ocfs2_xattr_get_nolock(dir, dir_bh,\n-\t\t\t\t\tOCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,\n-\t\t\t\t\t\"\", NULL, 0);\n-\t\tup_read(\u0026OCFS2_I(dir)-\u003eip_xattr_sem);\n-\t\tif (acl_len \u003e 0) {\n-\t\t\ta_size = ocfs2_xattr_entry_real_size(0, acl_len);\n-\t\t\tif (S_ISDIR(mode))\n-\t\t\t\ta_size \u003c\u003c= 1;\n-\t\t} else if (acl_len != 0 \u0026\u0026 acl_len != -ENODATA) {\n-\t\t\tret = acl_len;\n-\t\t\tmlog_errno(ret);\n-\t\t\treturn ret;\n+\t\tif (acl_state-\u003edefault_acl \u0026\u0026 S_ISDIR(mode)) {\n+\t\t\tacl_len = acl_state-\u003edefault_acl-\u003ea_count *\n+\t\t\t\t  sizeof(struct ocfs2_acl_entry);\n+\t\t\ta_size += ocfs2_xattr_entry_real_size(0, acl_len);\n+\t\t}\n+\t\tif (acl_state-\u003eacl) {\n+\t\t\tacl_len = acl_state-\u003eacl-\u003ea_count *\n+\t\t\t\t  sizeof(struct ocfs2_acl_entry);\n+\t\t\ta_size += ocfs2_xattr_entry_real_size(0, acl_len);\n \t\t}\n \t}\n \n@@ -683,14 +676,29 @@ int ocfs2_calc_xattr_init(struct inode *dir,\n \t\t\t\t\t\t\t   new_clusters);\n \t\t*want_clusters += new_clusters;\n \t}\n-\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL \u0026\u0026\n-\t    acl_len \u003e OCFS2_XATTR_INLINE_SIZE) {\n-\t\t/* for directory, it has DEFAULT and ACCESS two types of acls */\n-\t\tnew_clusters = (S_ISDIR(mode) ? 2 : 1) *\n-\t\t\t\tocfs2_clusters_for_bytes(dir-\u003ei_sb, acl_len);\n-\t\t*xattr_credits += ocfs2_clusters_to_blocks(dir-\u003ei_sb,\n-\t\t\t\t\t\t\t   new_clusters);\n-\t\t*want_clusters += new_clusters;\n+\tif (osb-\u003es_mount_opt \u0026 OCFS2_MOUNT_POSIX_ACL) {\n+\t\tif (acl_state-\u003edefault_acl \u0026\u0026 S_ISDIR(mode)) {\n+\t\t\tacl_len = acl_state-\u003edefault_acl-\u003ea_count *\n+\t\t\t\t  sizeof(struct ocfs2_acl_entry);\n+\t\t\tif (acl_len \u003e OCFS2_XATTR_INLINE_SIZE) {\n+\t\t\t\tnew_clusters = ocfs2_clusters_for_bytes(\n+\t\t\t\t\tdir-\u003ei_sb, acl_len);\n+\t\t\t\t*xattr_credits += ocfs2_clusters_to_blocks(\n+\t\t\t\t\tdir-\u003ei_sb, new_clusters);\n+\t\t\t\t*want_clusters += new_clusters;\n+\t\t\t}\n+\t\t}\n+\t\tif (acl_state-\u003eacl) {\n+\t\t\tacl_len = acl_state-\u003eacl-\u003ea_count *\n+\t\t\t\t  sizeof(struct ocfs2_acl_entry);\n+\t\t\tif (acl_len \u003e OCFS2_XATTR_INLINE_SIZE) {\n+\t\t\t\tnew_clusters = ocfs2_clusters_for_bytes(\n+\t\t\t\t\tdir-\u003ei_sb, acl_len);\n+\t\t\t\t*xattr_credits += ocfs2_clusters_to_blocks(\n+\t\t\t\t\tdir-\u003ei_sb, new_clusters);\n+\t\t\t\t*want_clusters += new_clusters;\n+\t\t\t}\n+\t\t}\n \t}\n \n \treturn ret;\n@@ -7257,6 +7265,7 @@ int ocfs2_init_security_and_acl(struct inode *dir,\n {\n \tint ret = 0;\n \tstruct buffer_head *dir_bh = NULL;\n+\tstruct ocfs2_acl_state acl_state;\n \n \tret = ocfs2_init_security_get(inode, dir, qstr, NULL);\n \tif (ret) {\n@@ -7269,10 +7278,17 @@ int ocfs2_init_security_and_acl(struct inode *dir,\n \t\tmlog_errno(ret);\n \t\tgoto leave;\n \t}\n-\tret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);\n+\n+\tret = ocfs2_acl_init_prepare(inode, dir, dir_bh, \u0026acl_state);\n+\tif (ret)\n+\t\tgoto unlock;\n+\n+\tret = ocfs2_init_acl(NULL, inode, NULL, NULL, NULL, \u0026acl_state);\n \tif (ret)\n \t\tmlog_errno(ret);\n \n+\tocfs2_acl_init_release(\u0026acl_state);\n+unlock:\n \tocfs2_inode_unlock(dir, 0);\n \tbrelse(dir_bh);\n leave:\ndiff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h\nindex 65e9aa7439199e..789c5500a06d91 100644\n--- a/fs/ocfs2/xattr.h\n+++ b/fs/ocfs2/xattr.h\n@@ -55,9 +55,11 @@ int ocfs2_init_security_set(handle_t *, struct inode *,\n int ocfs2_calc_security_init(struct inode *,\n \t\t\t     struct ocfs2_security_xattr_info *,\n \t\t\t     int *, int *, struct ocfs2_alloc_context **);\n-int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,\n-\t\t\t  umode_t, struct ocfs2_security_xattr_info *,\n-\t\t\t  int *, int *, int *);\n+\n+struct ocfs2_acl_state;\n+int ocfs2_calc_xattr_init(struct inode *, umode_t,\n+\t\t\t  struct ocfs2_security_xattr_info *, int *, int *,\n+\t\t\t  int *, struct ocfs2_acl_state *);\n \n /*\n  * xattrs can live inside an inode, as part of an external xattr block,\n"
}

best-expensive

null

{
  "EnableConfigs": [
    "OCFS2_FS"
  ],
  "FocusSymbols": [
    "ocfs2_mknod",
    "ocfs2_acl_init_prepare",
    "ocfs2_init_acl",
    "ocfs2_calc_xattr_init",
    "ocfs2_init_security_and_acl"
  ],
  "Reasoning": "The patch modifies the ACL initialization logic in OCFS2 during inode creation (e.g., mkdir, mknod, create, and reflink). It introduces `ocfs2_acl_init_prepare` to fetch and prepare ACLs before calculating xattr credits, altering the core execution flow and lock ordering. This is a functional change that should be fuzzed to ensure no regressions or new deadlocks are introduced.",
  "WorthFuzzing": true
}

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).

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.
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.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. 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 eb212125809b8b2dbe3334f7d12d6e5f9df359a5
Author: syz-cluster <triage@syzkaller.com>
Date:   Tue Jul 21 11:02:39 2026 +0000

    syz-cluster: applied patch under review

diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index af1e2cedb217f1..1c45993e34b005 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -110,8 +110,7 @@ static void *ocfs2_acl_to_xattr(const struct posix_acl *acl, size_t *size)
 	return ocfs2_acl;
 }
 
-static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode,
-					      int type,
+static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode, int type,
 					      struct buffer_head *di_bh)
 {
 	int name_index;
@@ -349,63 +348,98 @@ int ocfs2_acl_chmod(struct inode *inode, struct buffer_head *bh)
  * Initialize the ACLs of a new inode. If parent directory has default ACL,
  * then clone to new inode. Called from ocfs2_mknod.
  */
-int ocfs2_init_acl(handle_t *handle,
-		   struct inode *inode,
-		   struct inode *dir,
-		   struct buffer_head *di_bh,
-		   struct buffer_head *dir_bh,
-		   struct ocfs2_alloc_context *meta_ac,
-		   struct ocfs2_alloc_context *data_ac)
+int ocfs2_acl_init_prepare(struct inode *inode, struct inode *dir,
+			   struct buffer_head *dir_bh,
+			   struct ocfs2_acl_state *state)
 {
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-	struct posix_acl *acl = NULL;
-	int ret = 0, ret2;
-	umode_t mode;
-
-	if (!S_ISLNK(inode->i_mode)) {
-		if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
-			down_read(&OCFS2_I(dir)->ip_xattr_sem);
-			acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
-						   dir_bh);
-			up_read(&OCFS2_I(dir)->ip_xattr_sem);
-			if (IS_ERR(acl))
-				return PTR_ERR(acl);
+	int ret = 0;
+
+	state->default_acl = NULL;
+	state->acl = NULL;
+	state->mode = inode->i_mode;
+
+	if (S_ISLNK(inode->i_mode))
+		return 0;
+
+	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
+		down_read(&OCFS2_I(dir)->ip_xattr_sem);
+		state->default_acl =
+			ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT, dir_bh);
+		up_read(&OCFS2_I(dir)->ip_xattr_sem);
+		if (IS_ERR(state->default_acl)) {
+			ret = PTR_ERR(state->default_acl);
+			state->default_acl = NULL;
+			return ret;
 		}
-		if (!acl) {
-			mode = inode->i_mode & ~current_umask();
-			ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
-			if (ret) {
-				mlog_errno(ret);
-				goto cleanup;
+		if (state->default_acl) {
+			state->acl = posix_acl_dup(state->default_acl);
+			if (!state->acl)
+				return -ENOMEM;
+			ret = __posix_acl_create(&state->acl, GFP_NOFS,
+						 &state->mode);
+			if (ret < 0)
+				return ret;
+			if (ret == 0) {
+				posix_acl_release(state->acl);
+				state->acl = NULL;
+			}
+			if (!S_ISDIR(inode->i_mode)) {
+				posix_acl_release(state->default_acl);
+				state->default_acl = NULL;
 			}
+		} else {
+			state->mode &= ~current_umask();
 		}
+	} else {
+		state->mode &= ~current_umask();
 	}
-	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
-		if (S_ISDIR(inode->i_mode)) {
+
+	return 0;
+}
+
+void ocfs2_acl_init_release(struct ocfs2_acl_state *state)
+{
+	posix_acl_release(state->default_acl);
+	posix_acl_release(state->acl);
+}
+
+int ocfs2_init_acl(handle_t *handle, struct inode *inode,
+		   struct buffer_head *di_bh,
+		   struct ocfs2_alloc_context *meta_ac,
+		   struct ocfs2_alloc_context *data_ac,
+		   struct ocfs2_acl_state *state)
+{
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	int ret = 0;
+
+	if (S_ISLNK(inode->i_mode))
+		return 0;
+
+	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
+		if (S_ISDIR(inode->i_mode) && state->default_acl) {
 			ret = ocfs2_set_acl(handle, inode, di_bh,
-					    ACL_TYPE_DEFAULT, acl,
-					    meta_ac, data_ac);
+					    ACL_TYPE_DEFAULT,
+					    state->default_acl, meta_ac,
+					    data_ac);
 			if (ret)
-				goto cleanup;
+				return ret;
 		}
-		mode = inode->i_mode;
-		ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
-		if (ret < 0)
-			return ret;
+	}
 
-		ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
-		if (ret2) {
-			mlog_errno(ret2);
-			ret = ret2;
-			goto cleanup;
-		}
-		if (ret > 0) {
-			ret = ocfs2_set_acl(handle, inode,
-					    di_bh, ACL_TYPE_ACCESS,
-					    acl, meta_ac, data_ac);
+	ret = ocfs2_acl_set_mode(inode, di_bh, handle, state->mode);
+	if (ret) {
+		mlog_errno(ret);
+		return ret;
+	}
+
+	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
+		if (state->acl) {
+			ret = ocfs2_set_acl(handle, inode, di_bh,
+					    ACL_TYPE_ACCESS, state->acl,
+					    meta_ac, data_ac);
 		}
 	}
-cleanup:
-	posix_acl_release(acl);
+
 	return ret;
 }
diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h
index 667c6f03fa606f..a91f9ce278d6d3 100644
--- a/fs/ocfs2/acl.h
+++ b/fs/ocfs2/acl.h
@@ -20,9 +20,20 @@ struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, bool rcu);
 int ocfs2_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 		      struct posix_acl *acl, int type);
 extern int ocfs2_acl_chmod(struct inode *, struct buffer_head *);
-extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *,
-			  struct buffer_head *, struct buffer_head *,
-			  struct ocfs2_alloc_context *,
-			  struct ocfs2_alloc_context *);
+struct ocfs2_acl_state {
+	struct posix_acl *default_acl;
+	struct posix_acl *acl;
+	umode_t mode;
+};
+
+int ocfs2_acl_init_prepare(struct inode *inode, struct inode *dir,
+			   struct buffer_head *dir_bh,
+			   struct ocfs2_acl_state *state);
+void ocfs2_acl_init_release(struct ocfs2_acl_state *state);
+int ocfs2_init_acl(handle_t *handle, struct inode *inode,
+		   struct buffer_head *di_bh,
+		   struct ocfs2_alloc_context *meta_ac,
+		   struct ocfs2_alloc_context *data_ac,
+		   struct ocfs2_acl_state *state);
 
 #endif /* OCFS2_ACL_H */
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 1277666c77cd2d..1d492f3591bebe 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -256,6 +256,7 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,
 	sigset_t oldset;
 	int did_block_signals = 0;
 	struct ocfs2_dentry_lock *dl = NULL;
+	struct ocfs2_acl_state acl_state;
 
 	trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
 			  (unsigned long long)OCFS2_I(dir)->ip_blkno,
@@ -330,10 +331,13 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,
 		}
 	}
 
+	status = ocfs2_acl_init_prepare(inode, dir, parent_fe_bh, &acl_state);
+	if (status < 0)
+		goto leave;
+
 	/* calculate meta data/clusters for setting security and acl xattr */
-	status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
-				       &si, &want_clusters,
-				       &xattr_credits, &want_meta);
+	status = ocfs2_calc_xattr_init(dir, mode, &si, &want_clusters,
+				       &xattr_credits, &want_meta, &acl_state);
 	if (status < 0) {
 		mlog_errno(status);
 		goto leave;
@@ -411,8 +415,8 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,
 		inc_nlink(dir);
 	}
 
-	status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
-			 meta_ac, data_ac);
+	status = ocfs2_init_acl(handle, inode, new_fe_bh, meta_ac, data_ac,
+				&acl_state);
 
 	if (status < 0) {
 		mlog_errno(status);
@@ -477,6 +481,8 @@ static int ocfs2_mknod(struct mnt_idmap *idmap,
 	brelse(parent_fe_bh);
 	kfree(si.value);
 
+	ocfs2_acl_init_release(&acl_state);
+
 	ocfs2_free_dir_lookup_result(&lookup);
 
 	if (inode_ac)
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index fcddd3c13acddd..25e52633cea287 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -611,13 +611,10 @@ int ocfs2_calc_security_init(struct inode *dir,
 	return ret;
 }
 
-int ocfs2_calc_xattr_init(struct inode *dir,
-			  struct buffer_head *dir_bh,
-			  umode_t mode,
+int ocfs2_calc_xattr_init(struct inode *dir, umode_t mode,
 			  struct ocfs2_security_xattr_info *si,
-			  int *want_clusters,
-			  int *xattr_credits,
-			  int *want_meta)
+			  int *want_clusters, int *xattr_credits,
+			  int *want_meta, struct ocfs2_acl_state *acl_state)
 {
 	int ret = 0;
 	struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
@@ -628,19 +625,15 @@ int ocfs2_calc_xattr_init(struct inode *dir,
 						     si->value_len);
 
 	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
-		down_read(&OCFS2_I(dir)->ip_xattr_sem);
-		acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
-					OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
-					"", NULL, 0);
-		up_read(&OCFS2_I(dir)->ip_xattr_sem);
-		if (acl_len > 0) {
-			a_size = ocfs2_xattr_entry_real_size(0, acl_len);
-			if (S_ISDIR(mode))
-				a_size <<= 1;
-		} else if (acl_len != 0 && acl_len != -ENODATA) {
-			ret = acl_len;
-			mlog_errno(ret);
-			return ret;
+		if (acl_state->default_acl && S_ISDIR(mode)) {
+			acl_len = acl_state->default_acl->a_count *
+				  sizeof(struct ocfs2_acl_entry);
+			a_size += ocfs2_xattr_entry_real_size(0, acl_len);
+		}
+		if (acl_state->acl) {
+			acl_len = acl_state->acl->a_count *
+				  sizeof(struct ocfs2_acl_entry);
+			a_size += ocfs2_xattr_entry_real_size(0, acl_len);
 		}
 	}
 
@@ -683,14 +676,29 @@ int ocfs2_calc_xattr_init(struct inode *dir,
 							   new_clusters);
 		*want_clusters += new_clusters;
 	}
-	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
-	    acl_len > OCFS2_XATTR_INLINE_SIZE) {
-		/* for directory, it has DEFAULT and ACCESS two types of acls */
-		new_clusters = (S_ISDIR(mode) ? 2 : 1) *
-				ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
-		*xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
-							   new_clusters);
-		*want_clusters += new_clusters;
+	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
+		if (acl_state->default_acl && S_ISDIR(mode)) {
+			acl_len = acl_state->default_acl->a_count *
+				  sizeof(struct ocfs2_acl_entry);
+			if (acl_len > OCFS2_XATTR_INLINE_SIZE) {
+				new_clusters = ocfs2_clusters_for_bytes(
+					dir->i_sb, acl_len);
+				*xattr_credits += ocfs2_clusters_to_blocks(
+					dir->i_sb, new_clusters);
+				*want_clusters += new_clusters;
+			}
+		}
+		if (acl_state->acl) {
+			acl_len = acl_state->acl->a_count *
+				  sizeof(struct ocfs2_acl_entry);
+			if (acl_len > OCFS2_XATTR_INLINE_SIZE) {
+				new_clusters = ocfs2_clusters_for_bytes(
+					dir->i_sb, acl_len);
+				*xattr_credits += ocfs2_clusters_to_blocks(
+					dir->i_sb, new_clusters);
+				*want_clusters += new_clusters;
+			}
+		}
 	}
 
 	return ret;
@@ -7257,6 +7265,7 @@ int ocfs2_init_security_and_acl(struct inode *dir,
 {
 	int ret = 0;
 	struct buffer_head *dir_bh = NULL;
+	struct ocfs2_acl_state acl_state;
 
 	ret = ocfs2_init_security_get(inode, dir, qstr, NULL);
 	if (ret) {
@@ -7269,10 +7278,17 @@ int ocfs2_init_security_and_acl(struct inode *dir,
 		mlog_errno(ret);
 		goto leave;
 	}
-	ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);
+
+	ret = ocfs2_acl_init_prepare(inode, dir, dir_bh, &acl_state);
+	if (ret)
+		goto unlock;
+
+	ret = ocfs2_init_acl(NULL, inode, NULL, NULL, NULL, &acl_state);
 	if (ret)
 		mlog_errno(ret);
 
+	ocfs2_acl_init_release(&acl_state);
+unlock:
 	ocfs2_inode_unlock(dir, 0);
 	brelse(dir_bh);
 leave:
diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index 65e9aa7439199e..789c5500a06d91 100644
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -55,9 +55,11 @@ int ocfs2_init_security_set(handle_t *, struct inode *,
 int ocfs2_calc_security_init(struct inode *,
 			     struct ocfs2_security_xattr_info *,
 			     int *, int *, struct ocfs2_alloc_context **);
-int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
-			  umode_t, struct ocfs2_security_xattr_info *,
-			  int *, int *, int *);
+
+struct ocfs2_acl_state;
+int ocfs2_calc_xattr_init(struct inode *, umode_t,
+			  struct ocfs2_security_xattr_info *, int *, int *,
+			  int *, struct ocfs2_acl_state *);
 
 /*
  * xattrs can live inside an inode, as part of an external xattr block,

gemini-3.1-pro-preview

null

null

							input: 6862
							output: 35
							thoughts: 220
						

**OCFS2 ACL Initialization Refinement**

Okay, so this patch is digging into the ACL initialization within the OCFS2 filesystem. Specifically, it looks like it's tweaking how ACLs are handled during inode creation – functions like `ocfs2_mknod` and `ocfs2_init_security_and_acl` are the targets. The introduction of `ocfs2_acl_init_prepare` and `ocfs2_acl_init_release`, along with modifications to `ocfs2_init_acl` and `ocfs2_calc_xattr_init`, indicates a shift towards preparing ACLs upfront. The intent is pretty clear: to get those ACLs ready *before* any locking or potentially costly calculations kick in. This is likely aimed at avoiding race conditions, deadlocks, or maybe even ensuring that the calculations are accurate with pre-initialized values.

Alright, before I dive too deep into the code itself, I should figure out if OCFS2 is even a good candidate for fuzzing. Since it's a filesystem, it should be reachable through loop devices or similar setups, which is a good sign. And given that it's frequently enabled in standard fuzzing configurations, I'd say that's a check. To be sure about the exact configuration symbols, I should take a look at `fs/ocfs2/Kconfig` to pin down the exact config names being used (`CONFIG_OCFS2_FS`, `CONFIG_OCFS2_FS_POSIX_ACL`). This'll give me a better understanding of how the features are enabled.

{
  "Expression": "config OCFS2_FS",
  "PathPrefix": "fs/ocfs2/Kconfig"
}

{
  "Output": "fs/ocfs2/Kconfig-1-# SPDX-License-Identifier: GPL-2.0-only\nfs/ocfs2/Kconfig:2:config OCFS2_FS\nfs/ocfs2/Kconfig-3-\ttristate \"OCFS2 file system support\"\n--\nfs/ocfs2/Kconfig-27-\nfs/ocfs2/Kconfig:28:config OCFS2_FS_O2CB\nfs/ocfs2/Kconfig-29-\ttristate \"O2CB Kernelspace Clustering\"\n--\nfs/ocfs2/Kconfig-41-\nfs/ocfs2/Kconfig:42:config OCFS2_FS_USERSPACE_CLUSTER\nfs/ocfs2/Kconfig-43-\ttristate \"OCFS2 Userspace Clustering\"\n--\nfs/ocfs2/Kconfig-53-\nfs/ocfs2/Kconfig:54:config OCFS2_FS_STATS\nfs/ocfs2/Kconfig-55-\tbool \"OCFS2 statistics\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 7723
							output: 39
							thoughts: 10
						

Okay, here's my attempt at summarizing those thoughts from an expert's perspective, using a first-person perspective:

**Checking the POSIX ACL Configuration**

Alright, before diving into anything else, I need to make sure the POSIX Access Control List (ACL) configuration is where I expect it to be. This is a crucial first step. I can't even *begin* to assess the issue at hand, or troubleshoot, if the foundation regarding access control isn't sound. I'm going to quickly verify the ACL setup; verify the underlying libraries, if appropriate; and quickly check the current default ACLs. Are they set? Are they behaving as they should? Any misconfigurations here, and my debugging efforts will be entirely misdirected. It's a fundamental check, really. It's almost automatic at this point, but critical nonetheless. Let me start there.

no matches

{
  "Expression": "config OCFS2_FS_POSIX_ACL",
  "PathPrefix": "fs/ocfs2/Kconfig"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 7970
							output: 31
							thoughts: 40
						

Okay, let me think this through.

**Checking the OCFS2 POSIX ACL Configuration**

Hmm, I suspect I might be focusing on the wrong configuration option. Instead of the one I was initially looking at, perhaps it's actually tied to `CONFIG_OCFS2_FS_POSIX_ACL`. I should double-check that. Let me quickly navigate to `fs/ocfs2/Kconfig` and see if `POSIX_ACL` is defined or referenced within that file. That should give me the definitive answer. I need to confirm the exact connection here.

{
  "Expression": "POSIX_ACL",
  "PathPrefix": "fs/ocfs2/Kconfig"
}

{
  "Output": "fs/ocfs2/Kconfig=2=config OCFS2_FS\n--\nfs/ocfs2/Kconfig-9-\tselect QUOTA_TREE\nfs/ocfs2/Kconfig:10:\tselect FS_POSIX_ACL\nfs/ocfs2/Kconfig-11-\tselect LEGACY_DIRECT_IO\n"
}

gemini-3.1-pro-preview

null

null

							input: 8255
							output: 36
							thoughts: 206
						

**Analyzing the OCFS2 ACL Implementation**

Okay, so the code's selecting `FS_POSIX_ACL`, and that implies `OCFS2_FS` is sufficient to manage the functionality. Good. That's a reasonable starting point. Now, let's drill down into the modified functions. I see `ocfs2_acl_init_prepare`, `ocfs2_acl_init_release`, `ocfs2_init_acl`, `ocfs2_mknod`, `ocfs2_calc_xattr_init`, and `ocfs2_init_security_and_acl`. These are all crucial points for inode creation within OCFS2, so they're definitely worth a closer look.

My immediate fuzzing focus, given these changes, has to be `ocfs2_mknod`, `ocfs2_init_acl`, `ocfs2_calc_xattr_init`, and `ocfs2_init_security_and_acl`. I need to understand how these ACL initialization and inode creation functions are interacting, and where the potential vulnerabilities might be. Before I go too deep, though, let's also investigate if any other functions call `ocfs2_init_acl` or `ocfs2_calc_xattr_init` that were also modified. We can't let anything slip through the cracks; a change in one place could have rippling effects elsewhere.

{
  "Expression": "ocfs2_calc_xattr_init",
  "PathPrefix": "fs/ocfs2/"
}

{
  "Output": "fs/ocfs2/namei.c=230=static int ocfs2_mknod(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-338-\t/* calculate meta data/clusters for setting security and acl xattr */\nfs/ocfs2/namei.c:339:\tstatus = ocfs2_calc_xattr_init(dir, mode, \u0026si, \u0026want_clusters,\nfs/ocfs2/namei.c-340-\t\t\t\t       \u0026xattr_credits, \u0026want_meta, \u0026acl_state);\n--\nfs/ocfs2/xattr.c=576=int ocfs2_calc_security_init(struct inode *dir,\n--\nfs/ocfs2/xattr.c-613-\nfs/ocfs2/xattr.c:614:int ocfs2_calc_xattr_init(struct inode *dir, umode_t mode,\nfs/ocfs2/xattr.c-615-\t\t\t  struct ocfs2_security_xattr_info *si,\n--\nfs/ocfs2/xattr.h=59=struct ocfs2_acl_state;\nfs/ocfs2/xattr.h:60:int ocfs2_calc_xattr_init(struct inode *, umode_t,\nfs/ocfs2/xattr.h-61-\t\t\t  struct ocfs2_security_xattr_info *, int *, int *,\n"
}

gemini-3.1-pro-preview

null

null

							input: 9178
							output: 33
							thoughts: 12
						

Okay, here's my attempt at summarizing that thought process, keeping in mind I'm speaking to a fellow expert:

**Investigating ACL Initialization in OCFS2**

Alright, I'm diving into this… the code's got me thinking about ACL initialization, specifically `ocfs2_init_acl`. What exactly is happening during that stage? I need to refresh my memory on the critical points of how OCFS2 sets up its Access Control Lists. I'm wondering if there are any specific subtleties within `ocfs2_init_acl` that I should be keeping in mind and revisiting. Are there particular edge cases or potential bottlenecks here that deserve further scrutiny? I should probably trace the execution path from the call to see where it sits in the larger OCFS2 initialization sequence. Is it being called at the right time in the filesystem’s setup? What are the implications of the configuration options on the function's execution? I also wonder how the initialization might differ based on the type of ACLs configured, and whether different versions of the ACL spec are properly handled. Gotta look at the implementation to assess any security implications and whether it ties back to the data structures.

{
  "Expression": "ocfs2_init_acl",
  "PathPrefix": "fs/ocfs2/"
}

{
  "Output": "fs/ocfs2/acl.c=401=void ocfs2_acl_init_release(struct ocfs2_acl_state *state)\n--\nfs/ocfs2/acl.c-406-\nfs/ocfs2/acl.c:407:int ocfs2_init_acl(handle_t *handle, struct inode *inode,\nfs/ocfs2/acl.c-408-\t\t   struct buffer_head *di_bh,\n--\nfs/ocfs2/acl.h=32=void ocfs2_acl_init_release(struct ocfs2_acl_state *state);\nfs/ocfs2/acl.h:33:int ocfs2_init_acl(handle_t *handle, struct inode *inode,\nfs/ocfs2/acl.h-34-\t\t   struct buffer_head *di_bh,\n--\nfs/ocfs2/namei.c=230=static int ocfs2_mknod(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-417-\nfs/ocfs2/namei.c:418:\tstatus = ocfs2_init_acl(handle, inode, new_fe_bh, meta_ac, data_ac,\nfs/ocfs2/namei.c-419-\t\t\t\t\u0026acl_state);\n--\nfs/ocfs2/xattr.c=7262=int ocfs2_init_security_and_acl(struct inode *dir,\n--\nfs/ocfs2/xattr.c-7285-\nfs/ocfs2/xattr.c:7286:\tret = ocfs2_init_acl(NULL, inode, NULL, NULL, NULL, \u0026acl_state);\nfs/ocfs2/xattr.c-7287-\tif (ret)\n"
}

gemini-3.1-pro-preview

null

null

							input: 9939
							output: 37
							thoughts: 20
						

Here's my thought process, summarized as you requested:

**Tracing the Security Initialization**

Okay, so I'm trying to understand the security initialization in OCFS2. The critical question is, where exactly does `ocfs2_init_security_and_acl` get called from? I need to trace the call stack to understand the context and what's setting up the environment for it. Knowing the caller function is key to debugging and understanding how the security features are integrated. Right now, that's the central piece of information I'm after.

{
  "Expression": "ocfs2_init_security_and_acl",
  "PathPrefix": "fs/ocfs2/"
}

{
  "Output": "fs/ocfs2/refcounttree.c=4238=static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir,\n--\nfs/ocfs2/refcounttree.c-4296-\tif (!preserve) {\nfs/ocfs2/refcounttree.c:4297:\t\terror = ocfs2_init_security_and_acl(dir, new_orphan_inode,\nfs/ocfs2/refcounttree.c-4298-\t\t\t\t\t\t    \u0026new_dentry-\u003ed_name);\n--\nfs/ocfs2/xattr.c=7180=int ocfs2_reflink_xattrs(struct inode *old_inode,\n--\nfs/ocfs2/xattr.c-7261- */\nfs/ocfs2/xattr.c:7262:int ocfs2_init_security_and_acl(struct inode *dir,\nfs/ocfs2/xattr.c-7263-\t\t\t\tstruct inode *inode,\n--\nfs/ocfs2/xattr.h=82=int ocfs2_reflink_xattrs(struct inode *old_inode,\n--\nfs/ocfs2/xattr.h-86-\t\t\t bool preserve_security);\nfs/ocfs2/xattr.h:87:int ocfs2_init_security_and_acl(struct inode *dir,\nfs/ocfs2/xattr.h-88-\t\t\t\tstruct inode *inode,\n"
}

gemini-3.1-pro-preview

null

null

							input: 10492
							output: 33
							thoughts: 46
						

Okay, here's my interpretation of those thoughts, summarized from my perspective as a seasoned professional:

**Digging into OCFS2 Internals: Reflink and Mknod Calls**

Right, so `ocfs2_reflink` is definitely a key player here, which makes me think this warrants a deeper dive. My initial hunch is that we need to examine where else `ocfs2_mknod` is used. Thinking about the usual suspects in file system operations, I'd wager it's heavily involved in the core creation routines - things like `mkdir`, file `create`, and `symlink`. That's where I would start my investigation, and where the most interesting insights are likely to lie.

{
  "Expression": "ocfs2_mknod",
  "PathPrefix": "fs/ocfs2/"
}

{
  "Output": "fs/ocfs2/acl.c=321=int ocfs2_acl_chmod(struct inode *inode, struct buffer_head *bh)\n--\nfs/ocfs2/acl.c-348- * Initialize the ACLs of a new inode. If parent directory has default ACL,\nfs/ocfs2/acl.c:349: * then clone to new inode. Called from ocfs2_mknod.\nfs/ocfs2/acl.c-350- */\n--\nfs/ocfs2/dir.c=2212=static struct ocfs2_dir_entry *ocfs2_fill_initial_dirents(struct inode *inode,\n--\nfs/ocfs2/dir.c-2236-/*\nfs/ocfs2/dir.c:2237: * This works together with code in ocfs2_mknod_locked() which sets\nfs/ocfs2/dir.c-2238- * the inline-data flag and initializes the inline-data section.\n--\nfs/ocfs2/inode.c=372=void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,\n--\nfs/ocfs2/inode.c-387-\t * These have all been checked by ocfs2_read_inode_block() or set\nfs/ocfs2/inode.c:388:\t * by ocfs2_mknod_locked(), so a failure is a code bug.\nfs/ocfs2/inode.c-389-\t */\n--\nfs/ocfs2/journal.h=413=static inline int ocfs2_add_dir_index_credits(struct super_block *sb)\n--\nfs/ocfs2/journal.h-423- * blocks + quota update */\nfs/ocfs2/journal.h:424:static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,\nfs/ocfs2/journal.h-425-\t\t\t\t      int xattr_credits)\n--\nfs/ocfs2/journal.h=549=static inline int ocfs2_calc_symlink_credits(struct super_block *sb)\nfs/ocfs2/journal.h-550-{\nfs/ocfs2/journal.h:551:\tint blocks = ocfs2_mknod_credits(sb, 0, 0);\nfs/ocfs2/journal.h-552-\n--\nfs/ocfs2/namei.c-55-\nfs/ocfs2/namei.c:56:static int ocfs2_mknod_locked(struct ocfs2_super *osb,\nfs/ocfs2/namei.c-57-\t\t\t      struct inode *dir,\n--\nfs/ocfs2/namei.c=215=static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,\n--\nfs/ocfs2/namei.c-229-\nfs/ocfs2/namei.c:230:static int ocfs2_mknod(struct mnt_idmap *idmap,\nfs/ocfs2/namei.c-231-\t\t       struct inode *dir,\n--\nfs/ocfs2/namei.c-260-\nfs/ocfs2/namei.c:261:\ttrace_ocfs2_mknod(dir, dentry, dentry-\u003ed_name.len, dentry-\u003ed_name.name,\nfs/ocfs2/namei.c-262-\t\t\t  (unsigned long long)OCFS2_I(dir)-\u003eip_blkno,\n--\nfs/ocfs2/namei.c-368-\nfs/ocfs2/namei.c:369:\thandle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb-\u003esb,\nfs/ocfs2/namei.c-370-\t\t\t\t\t\t\t    S_ISDIR(mode),\n--\nfs/ocfs2/namei.c-388-\t/* do the real work now. */\nfs/ocfs2/namei.c:389:\tstatus = ocfs2_mknod_locked(osb, dir, inode, dev,\nfs/ocfs2/namei.c-390-\t\t\t\t    \u0026new_fe_bh, parent_fe_bh, handle,\n--\nfs/ocfs2/namei.c-516-\nfs/ocfs2/namei.c:517:static int __ocfs2_mknod_locked(struct inode *dir,\nfs/ocfs2/namei.c-518-\t\t\t\tstruct inode *inode,\n--\nfs/ocfs2/namei.c-628-\nfs/ocfs2/namei.c:629:static int ocfs2_mknod_locked(struct ocfs2_super *osb,\nfs/ocfs2/namei.c-630-\t\t\t      struct inode *dir,\n--\nfs/ocfs2/namei.c-651-\nfs/ocfs2/namei.c:652:\treturn __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,\nfs/ocfs2/namei.c-653-\t\t\t\t    handle, inode_ac, fe_blkno,\n--\nfs/ocfs2/namei.c=657=static struct dentry *ocfs2_mkdir(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-665-\t\t\t  OCFS2_I(dir)-\u003eip_blkno, mode);\nfs/ocfs2/namei.c:666:\tret = ocfs2_mknod(\u0026nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0);\nfs/ocfs2/namei.c-667-\tif (ret)\n--\nfs/ocfs2/namei.c=673=static int ocfs2_create(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-682-\t\t\t   (unsigned long long)OCFS2_I(dir)-\u003eip_blkno, mode);\nfs/ocfs2/namei.c:683:\tret = ocfs2_mknod(\u0026nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0);\nfs/ocfs2/namei.c-684-\tif (ret)\n--\nfs/ocfs2/namei.c=1813=static int ocfs2_symlink(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-1955-\nfs/ocfs2/namei.c:1956:\tstatus = ocfs2_mknod_locked(osb, dir, inode,\nfs/ocfs2/namei.c-1957-\t\t\t\t    0, \u0026new_fe_bh, parent_fe_bh, handle,\n--\nfs/ocfs2/namei.c=2520=int ocfs2_create_inode_in_orphan(struct inode *dir,\n--\nfs/ocfs2/namei.c-2560-\nfs/ocfs2/namei.c:2561:\thandle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb-\u003esb, 0, 0));\nfs/ocfs2/namei.c-2562-\tif (IS_ERR(handle)) {\n--\nfs/ocfs2/namei.c-2583-\t/* do the real work now. */\nfs/ocfs2/namei.c:2584:\tstatus = __ocfs2_mknod_locked(dir, inode,\nfs/ocfs2/namei.c-2585-\t\t\t\t      0, \u0026new_di_bh, handle,\n--\nfs/ocfs2/namei.c=2932=const struct inode_operations ocfs2_dir_iops = {\n--\nfs/ocfs2/namei.c-2939-\t.mkdir\t\t= ocfs2_mkdir,\nfs/ocfs2/namei.c:2940:\t.mknod\t\t= ocfs2_mknod,\nfs/ocfs2/namei.c-2941-\t.rename\t\t= ocfs2_rename,\n--\nfs/ocfs2/ocfs2_trace.h=2197=DEFINE_OCFS2_POINTER_EVENT(ocfs2_lookup_ret);\nfs/ocfs2/ocfs2_trace.h-2198-\nfs/ocfs2/ocfs2_trace.h:2199:TRACE_EVENT(ocfs2_mknod,\nfs/ocfs2/ocfs2_trace.h-2200-\tTP_PROTO(void *dir, void *dentry, int name_len, const char *name,\n"
}

gemini-3.1-pro-preview

null

null

							input: 12978
							output: 37
							thoughts: 117
						

Okay, let's break this down.

**Investigating the OCFS2 Filesystem Node Creation Functions**

Right, so I'm trying to solidify my understanding of the OCFS2 filesystem internals, specifically around how different types of nodes are created. Initially, I thought that `ocfs2_mknod` was the primary function used across the board for creating various nodes, covering things like regular files through `mknod`, directories with `mkdir`, and general file creation calls. My mental model linked it directly to these operations. However, I seem to recall that symlinks present a slightly different approach.

Then I paused. There’s something… off. I *thought* `ocfs2_symlink` utilized `ocfs2_mknod_locked`, but now I'm questioning that. I need to be sure. Does it use `ocfs2_mknod` at all? Or perhaps it leverages a related initialization function like `ocfs2_init_acl`? Memory is getting fuzzy here. The nuances of the ACL handling and other metadata initialization are what I need to focus on.

The only way to definitively answer this is to go straight to the source. Let's delve into the `ocfs2_symlink` function's implementation. Specifically, I need to check `fs/ocfs2/namei.c` to see how symlink creation is actually handled. Time to analyze the code.

{
  "Expression": "ocfs2_init_acl",
  "PathPrefix": "fs/ocfs2/namei.c"
}

{
  "Output": "fs/ocfs2/namei.c=230=static int ocfs2_mknod(struct mnt_idmap *idmap,\n--\nfs/ocfs2/namei.c-417-\nfs/ocfs2/namei.c:418:\tstatus = ocfs2_init_acl(handle, inode, new_fe_bh, meta_ac, data_ac,\nfs/ocfs2/namei.c-419-\t\t\t\t\u0026acl_state);\n"
}

gemini-3.1-pro-preview

null

null

							input: 13572
							output: 30
							thoughts: 360
						

**Analyzing the OCFS2 ACL Initialization Patch**

Okay, so I'm looking at this patch and immediately, I see that `ocfs2_symlink` *doesn't* use `ocfs2_init_acl`, which is a bit of a detail I hadn't considered before. But the main thing here is the modification to `ocfs2_mknod`. Right, `ocfs2_mknod` is the workhorse function for creating *everything* – files, directories, special files, you name it.

So, this patch changes the execution order. It's calling `ocfs2_acl_init_prepare` *before* `ocfs2_calc_xattr_init` within `ocfs2_mknod`. And then, `ocfs2_init_acl` is called later. Additionally, it looks like it modifies `ocfs2_init_security_and_acl`, which is used in `ocfs2_reflink`.

This is significant. We're talking about fundamental changes to core filesystem logic, specifically how inodes are created and how ACLs are initialized. This is definitely going to require some serious fuzzing. This should absolutely be treated as a functional change.

Let's nail down the critical symbols we need to focus on: `ocfs2_mknod`, `ocfs2_init_acl`, `ocfs2_acl_init_prepare`, `ocfs2_calc_xattr_init`, and `ocfs2_init_security_and_acl`.

Alright, let's make sure we've got the reachability nailed down. `ocfs2_acl_init_prepare` is reachable - we can see that it's called from both `ocfs2_mknod` and `ocfs2_init_security_and_acl`, so that looks good. And `ocfs2_init_security_and_acl` is called from `ocfs2_reflink_xattrs` and `ocfs2_reflink`.

Now, we need to consider the build configuration. Obviously, we need `OCFS2_FS` enabled. Is there anything else that's indirectly required? Let me go back and double-check `fs/ocfs2/Kconfig` to be absolutely sure.

{
  "Expression": "depends on",
  "PathPrefix": "fs/ocfs2/Kconfig"
}

{
  "Output": "fs/ocfs2/Kconfig=2=config OCFS2_FS\nfs/ocfs2/Kconfig-3-\ttristate \"OCFS2 file system support\"\nfs/ocfs2/Kconfig:4:\tdepends on INET \u0026\u0026 SYSFS \u0026\u0026 CONFIGFS_FS\nfs/ocfs2/Kconfig-5-\tselect BUFFER_HEAD\n--\nfs/ocfs2/Kconfig=28=config OCFS2_FS_O2CB\nfs/ocfs2/Kconfig-29-\ttristate \"O2CB Kernelspace Clustering\"\nfs/ocfs2/Kconfig:30:\tdepends on OCFS2_FS\nfs/ocfs2/Kconfig-31-\tdefault y\n--\nfs/ocfs2/Kconfig=42=config OCFS2_FS_USERSPACE_CLUSTER\nfs/ocfs2/Kconfig-43-\ttristate \"OCFS2 Userspace Clustering\"\nfs/ocfs2/Kconfig:44:\tdepends on OCFS2_FS \u0026\u0026 DLM\nfs/ocfs2/Kconfig-45-\tdefault y\n--\nfs/ocfs2/Kconfig=54=config OCFS2_FS_STATS\nfs/ocfs2/Kconfig-55-\tbool \"OCFS2 statistics\"\nfs/ocfs2/Kconfig:56:\tdepends on OCFS2_FS \u0026\u0026 DEBUG_FS\nfs/ocfs2/Kconfig-57-\tdefault y\n--\nfs/ocfs2/Kconfig=62=config OCFS2_DEBUG_MASKLOG\nfs/ocfs2/Kconfig-63-\tbool \"OCFS2 logging support\"\nfs/ocfs2/Kconfig:64:\tdepends on OCFS2_FS\nfs/ocfs2/Kconfig-65-\tdefault y\n--\nfs/ocfs2/Kconfig=72=config OCFS2_DEBUG_FS\nfs/ocfs2/Kconfig-73-\tbool \"OCFS2 expensive checks\"\nfs/ocfs2/Kconfig:74:\tdepends on OCFS2_FS\nfs/ocfs2/Kconfig-75-\tdefault n\n"
}

gemini-3.1-pro-preview

null

null

							input: 14996
							output: 184
							thoughts: 971
						

**OCFS2 ACL Initialization Analysis and Focus Symbol Selection**

Okay, so I'm looking at this OCFS2 patch. It seems to be touching the ACL initialization process, specifically related to inode creation and initialization across various operations like `mkdir`, `mknod`, `create`, and reflink. I see that `OCFS2_FS` is the relevant config. Since it changes the execution flow and lock ordering, this is definitely a functional change that warrants close scrutiny.

My initial thought was to identify the key symbols affected. I started with `OCFS2_FS` as the overarching config to consider. Then I moved to pinpointing specific functions that represent the core of the change. `ocfs2_mknod` is a good starting point, as it's the VFS entry point for `mknod`. Other relevant functions are called by `ocfs2_mknod`, like `ocfs2_mkdir` and `ocfs2_create` which can also lead to ACL operations. I've confirmed that the patch impacts `ocfs2_mknod`, `ocfs2_mkdir`, and `ocfs2_create` via the VFS interface, so it makes sense to focus on the common entry point, `ocfs2_mknod`.

From there, I've identified several other functions that seem crucial: `ocfs2_acl_init_prepare`, `ocfs2_init_acl`, `ocfs2_calc_xattr_init`, and `ocfs2_init_security_and_acl`. I wanted to quickly verify that these symbols aren't static. `ocfs2_acl_init_prepare` isn't static, it's defined in the header file and exposed, which is perfect. The rest of them, `ocfs2_init_acl`, `ocfs2_calc_xattr_init`, and `ocfs2_init_security_and_acl` are not static either, which further confirms their significance. Even though `ocfs2_mknod` is static within the file, it's assigned to a VFS operation so this is perfectly fine as well.

Based on the code, these functions together with the `mknod`, `mkdir` and `create` path, are the primary focus symbols for fuzzing this patch.

The reasoning is pretty clear. The patch introduces this `ocfs2_acl_init_prepare` function to prepare ACLs before specific lock acquisition or calculations occur. This suggests a change in the critical path and likely a reordering of operations. It's a functional change, aimed at fixing lock ordering or deadlock issues that can happen during the creation or modification of inodes, making it worth fuzzing, and worth looking into for regressions and new deadlocks. So, I will mark this change as `WorthFuzzing = true`. I need to ensure that this reordering is correct and that the ACLs are still handled properly in all cases, especially under concurrent access and with varying configurations. Time to call `set-results`.

{
  "EnableConfigs": [
    "OCFS2_FS"
  ],
  "FocusSymbols": [
    "ocfs2_mknod",
    "ocfs2_acl_init_prepare",
    "ocfs2_init_acl",
    "ocfs2_calc_xattr_init",
    "ocfs2_init_security_and_acl"
  ],
  "Reasoning": "The patch modifies the ACL initialization logic in OCFS2 during inode creation (e.g., mkdir, mknod, create, and reflink). It introduces `ocfs2_acl_init_prepare` to fetch and prepare ACLs before calculating xattr credits, altering the core execution flow and lock ordering. This is a functional change that should be fuzzed to ensure no regressions or new deadlocks are introduced.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "OCFS2_FS"
  ],
  "FocusSymbols": [
    "ocfs2_mknod",
    "ocfs2_acl_init_prepare",
    "ocfs2_init_acl",
    "ocfs2_calc_xattr_init",
    "ocfs2_init_security_and_acl"
  ],
  "Reasoning": "The patch modifies the ACL initialization logic in OCFS2 during inode creation (e.g., mkdir, mknod, create, and reflink). It introduces `ocfs2_acl_init_prepare` to fetch and prepare ACLs before calculating xattr credits, altering the core execution flow and lock ordering. This is a functional change that should be fuzzed to ensure no regressions or new deadlocks are introduced.",
  "WorthFuzzing": true
}