Syzbot CI

Subject	guest_memfd: In-place conversion support
Author	ackerleytng@google.com
Date	2026-03-26 22:24:10 +0000 UTC
Version
Cc	ackerleytng@google.com aik@amd.com akpm@linux-foundation.org andrew.jones@linux.dev aneesh.kumar@kernel.org axelrasmussen@google.com baohua@kernel.org bhe@redhat.com binbin.wu@linux.intel.com bp@alien8.de brauner@kernel.org chao.p.peng@linux.intel.com chrisl@kernel.org corbet@lwn.net dave.hansen@linux.intel.com david@kernel.org forkloop@google.com hpa@zytor.com ira.weiny@intel.com jgg@ziepe.ca jmattson@google.com jroedel@suse.de jthoughton@google.com kasong@tencent.com kvm@vger.kernel.org linux-doc@vger.kernel.org linux-kernel@vger.kernel.org linux-kselftest@vger.kernel.org linux-mm@kvack.org linux-trace-kernel@vger.kernel.org mathieu.desnoyers@efficios.com mhiramat@kernel.org michael.roth@amd.com mingo@redhat.com nphamcs@gmail.com oupton@kernel.org pankaj.gupta@amd.com pbonzini@redhat.com pratyush@kernel.org qperret@google.com rick.p.edgecombe@intel.com rientjes@google.com rostedt@goodmis.org seanjc@google.com shikemeng@huaweicloud.com shivankg@amd.com shuah@kernel.org skhan@linuxfoundation.org steven.price@arm.com suzuki.poulose@arm.com

Subject

guest_memfd: In-place conversion support

Author

ackerleytng@google.com

Date

2026-03-26 22:24:10 +0000 UTC

Version

ackerleytng@google.com aik@amd.com akpm@linux-foundation.org andrew.jones@linux.dev aneesh.kumar@kernel.org axelrasmussen@google.com baohua@kernel.org bhe@redhat.com binbin.wu@linux.intel.com bp@alien8.de brauner@kernel.org chao.p.peng@linux.intel.com chrisl@kernel.org corbet@lwn.net dave.hansen@linux.intel.com david@kernel.org forkloop@google.com hpa@zytor.com ira.weiny@intel.com jgg@ziepe.ca jmattson@google.com jroedel@suse.de jthoughton@google.com kasong@tencent.com kvm@vger.kernel.org linux-doc@vger.kernel.org linux-kernel@vger.kernel.org linux-kselftest@vger.kernel.org linux-mm@kvack.org linux-trace-kernel@vger.kernel.org mathieu.desnoyers@efficios.com mhiramat@kernel.org michael.roth@amd.com mingo@redhat.com nphamcs@gmail.com oupton@kernel.org pankaj.gupta@amd.com pbonzini@redhat.com pratyush@kernel.org qperret@google.com rick.p.edgecombe@intel.com rientjes@google.com rostedt@goodmis.org seanjc@google.com shikemeng@huaweicloud.com shivankg@amd.com shuah@kernel.org skhan@linuxfoundation.org steven.price@arm.com suzuki.poulose@arm.com

Name	Content [All]
[PATCH RFC v4 01/44] KVM: guest_memfd: Introduce per-gmem attributes, use to guard user mappings	[Body]
[PATCH RFC v4 02/44] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES	[Body]
[PATCH RFC v4 03/44] KVM: Enumerate support for PRIVATE memory iff kvm_arch_has_private_mem is defined	[Body]
[PATCH RFC v4 04/44] KVM: Stub in ability to disable per-VM memory attribute tracking	[Body]
[PATCH RFC v4 05/44] KVM: guest_memfd: Wire up kvm_get_memory_attributes() to per-gmem attributes	[Body]
[PATCH RFC v4 06/44] KVM: guest_memfd: Update kvm_gmem_populate() to use gmem attributes	[Body]
[PATCH RFC v4 07/44] KVM: guest_memfd: Only prepare folios for private pages	[Body]
[PATCH RFC v4 08/44] KVM: Introduce KVM_SET_MEMORY_ATTRIBUTES2	[Body]
[PATCH RFC v4 09/44] KVM: guest_memfd: Enable INIT_SHARED on guest_memfd for x86 Coco VMs	[Body]
[PATCH RFC v4 10/44] KVM: guest_memfd: Add support for KVM_SET_MEMORY_ATTRIBUTES2	[Body]
[PATCH RFC v4 11/44] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check	[Body]
[PATCH RFC v4 12/44] KVM: guest_memfd: Introduce default handlers for content modes	[Body]
[PATCH RFC v4 13/44] KVM: guest_memfd: Apply content modes while setting memory attributes	[Body]
[PATCH RFC v4 14/44] KVM: x86: Add support for applying content modes	[Body]
[PATCH RFC v4 15/44] KVM: Add CAP to enumerate supported SET_MEMORY_ATTRIBUTES2 flags	[Body]
[PATCH RFC v4 16/44] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86	[Body]
[PATCH RFC v4 17/44] KVM: Let userspace disable per-VM mem attributes, enable per-gmem attributes	[Body]
[PATCH RFC v4 18/44] KVM: selftests: Create gmem fd before "regular" fd when adding memslot	[Body]
[PATCH RFC v4 19/44] KVM: selftests: Rename guest_memfd{,_offset} to gmem_{fd,offset}	[Body]
[PATCH RFC v4 20/44] KVM: selftests: Add support for mmap() on guest_memfd in core library	[Body]
[PATCH RFC v4 21/44] KVM: selftests: Add selftests global for guest memory attributes capability	[Body]
[PATCH RFC v4 22/44] KVM: selftests: Update framework to use KVM_SET_MEMORY_ATTRIBUTES2	[Body]
[PATCH RFC v4 23/44] KVM: selftests: Add helpers for calling ioctls on guest_memfd	[Body]
[PATCH RFC v4 24/44] KVM: selftests: Test using guest_memfd for guest private memory	[Body]
[PATCH RFC v4 25/44] KVM: selftests: Test basic single-page conversion flow	[Body]
[PATCH RFC v4 26/44] KVM: selftests: Test conversion flow when INIT_SHARED	[Body]
[PATCH RFC v4 27/44] KVM: selftests: Test conversion precision in guest_memfd	[Body]
[PATCH RFC v4 28/44] KVM: selftests: Test conversion before allocation	[Body]
[PATCH RFC v4 29/44] KVM: selftests: Convert with allocated folios in different layouts	[Body]
[PATCH RFC v4 30/44] KVM: selftests: Test that truncation does not change shared/private status	[Body]
[PATCH RFC v4 31/44] KVM: selftests: Test that shared/private status is consistent across processes	[Body]
[PATCH RFC v4 32/44] KVM: selftests: Test conversion with elevated page refcount	[Body]
[PATCH RFC v4 33/44] KVM: selftests: Test that conversion to private does not support ZERO	[Body]
[PATCH RFC v4 34/44] KVM: selftests: Support checking that data not equal expected	[Body]
[PATCH RFC v4 35/44] KVM: selftests: Test that not specifying a conversion flag scrambles memory contents	[Body]
[PATCH RFC v4 36/44] KVM: selftests: Reset shared memory after hole-punching	[Body]
[PATCH RFC v4 37/44] KVM: selftests: Provide function to look up guest_memfd details from gpa	[Body]
[PATCH RFC v4 38/44] KVM: selftests: Provide common function to set memory attributes	[Body]
[PATCH RFC v4 39/44] KVM: selftests: Check fd/flags provided to mmap() when setting up memslot	[Body]
[PATCH RFC v4 40/44] KVM: selftests: Make TEST_EXPECT_SIGBUS thread-safe	[Body]
[PATCH RFC v4 41/44] KVM: selftests: Update private_mem_conversions_test to mmap() guest_memfd	[Body]
[PATCH RFC v4 42/44] KVM: selftests: Add script to exercise private_mem_conversions_test	[Body]
[PATCH RFC v4 43/44] KVM: selftests: Update pre-fault test to work with per-guest_memfd attributes	[Body]
[PATCH RFC v4 44/44] KVM: selftests: Update private memory exits test to work with per-gmem attributes	[Body]

Name

Content [All]

[PATCH RFC v4 01/44] KVM: guest_memfd: Introduce per-gmem attributes, use to guard user mappings

[PATCH RFC v4 02/44] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES

[PATCH RFC v4 03/44] KVM: Enumerate support for PRIVATE memory iff kvm_arch_has_private_mem is defined

[PATCH RFC v4 04/44] KVM: Stub in ability to disable per-VM memory attribute tracking

[PATCH RFC v4 05/44] KVM: guest_memfd: Wire up kvm_get_memory_attributes() to per-gmem attributes

[PATCH RFC v4 06/44] KVM: guest_memfd: Update kvm_gmem_populate() to use gmem attributes

[PATCH RFC v4 07/44] KVM: guest_memfd: Only prepare folios for private pages

[PATCH RFC v4 08/44] KVM: Introduce KVM_SET_MEMORY_ATTRIBUTES2

[PATCH RFC v4 09/44] KVM: guest_memfd: Enable INIT_SHARED on guest_memfd for x86 Coco VMs

[PATCH RFC v4 10/44] KVM: guest_memfd: Add support for KVM_SET_MEMORY_ATTRIBUTES2

[PATCH RFC v4 11/44] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check

[PATCH RFC v4 12/44] KVM: guest_memfd: Introduce default handlers for content modes

[PATCH RFC v4 13/44] KVM: guest_memfd: Apply content modes while setting memory attributes

[PATCH RFC v4 14/44] KVM: x86: Add support for applying content modes

[PATCH RFC v4 15/44] KVM: Add CAP to enumerate supported SET_MEMORY_ATTRIBUTES2 flags

[PATCH RFC v4 16/44] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86

[PATCH RFC v4 17/44] KVM: Let userspace disable per-VM mem attributes, enable per-gmem attributes

[PATCH RFC v4 18/44] KVM: selftests: Create gmem fd before "regular" fd when adding memslot

[PATCH RFC v4 19/44] KVM: selftests: Rename guest_memfd{,_offset} to gmem_{fd,offset}

[PATCH RFC v4 20/44] KVM: selftests: Add support for mmap() on guest_memfd in core library

[PATCH RFC v4 21/44] KVM: selftests: Add selftests global for guest memory attributes capability

[PATCH RFC v4 22/44] KVM: selftests: Update framework to use KVM_SET_MEMORY_ATTRIBUTES2

[PATCH RFC v4 23/44] KVM: selftests: Add helpers for calling ioctls on guest_memfd

[PATCH RFC v4 24/44] KVM: selftests: Test using guest_memfd for guest private memory

[PATCH RFC v4 25/44] KVM: selftests: Test basic single-page conversion flow

[PATCH RFC v4 26/44] KVM: selftests: Test conversion flow when INIT_SHARED

[PATCH RFC v4 27/44] KVM: selftests: Test conversion precision in guest_memfd

[PATCH RFC v4 28/44] KVM: selftests: Test conversion before allocation

[PATCH RFC v4 29/44] KVM: selftests: Convert with allocated folios in different layouts

[PATCH RFC v4 30/44] KVM: selftests: Test that truncation does not change shared/private status

[PATCH RFC v4 31/44] KVM: selftests: Test that shared/private status is consistent across processes

[PATCH RFC v4 32/44] KVM: selftests: Test conversion with elevated page refcount

[PATCH RFC v4 33/44] KVM: selftests: Test that conversion to private does not support ZERO

[PATCH RFC v4 34/44] KVM: selftests: Support checking that data not equal expected

[PATCH RFC v4 35/44] KVM: selftests: Test that not specifying a conversion flag scrambles memory contents

[PATCH RFC v4 36/44] KVM: selftests: Reset shared memory after hole-punching

[PATCH RFC v4 37/44] KVM: selftests: Provide function to look up guest_memfd details from gpa

[PATCH RFC v4 38/44] KVM: selftests: Provide common function to set memory attributes

[PATCH RFC v4 39/44] KVM: selftests: Check fd/flags provided to mmap() when setting up memslot

[PATCH RFC v4 40/44] KVM: selftests: Make TEST_EXPECT_SIGBUS thread-safe

[PATCH RFC v4 41/44] KVM: selftests: Update private_mem_conversions_test to mmap() guest_memfd

[PATCH RFC v4 42/44] KVM: selftests: Add script to exercise private_mem_conversions_test

[PATCH RFC v4 43/44] KVM: selftests: Update pre-fault test to work with per-guest_memfd attributes

[PATCH RFC v4 44/44] KVM: selftests: Update private memory exits test to work with per-gmem attributes

Session 2026-03-26

Passed

ID (for dev)	db806dfb-83f0-4651-9176-087fac9d1f3e
Status	finished
Triaged	OK [Log]
Execution Log	[Link]

Test	Base	Patched	Verdict
[KASAN] Build Base	d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config]		passed [Log]
[KASAN] Boot test: Base	d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config]		passed [Log]
[KASAN] Build Patched		d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config] [patched]	passed [Log]
[KASAN] Boot test: Patched		d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config] [patched]	passed [Log]
[KASAN] Fuzz	d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config]	d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf [Config] [patched]	passed [Log] [Artifacts]

Patches (44)

Series Summary

Sessions

Session 2026-03-26