WARNING in kvm_gmem_fault_user

Title	Replies (including bot)	Last reply
[PATCH] mm: thp: Deny THP for guest_memfd and secretmem in file_thp_enabled()	29 (29)	2026/02/21 04:37
[PATCH v2] mm: thp: deny THP for files on anonymous inodes	10 (10)	2026/02/20 23:59
[PATCH v2 0/2] Test MADV_COLLAPSE on guest_memfd	3 (3)	2026/02/20 23:54
[syzbot] [kvm?] WARNING in kvm_gmem_fault_user_mapping	0 (12)	2026/02/13 15:43
[PATCH] KVM: guest_memfd: Disable VMA merging with VM_DONTEXPAND	10 (11)	2026/02/09 19:38
[PATCH 1/2] KVM: guest_memfd: Always use order 0 when allocating for guest_memfd	3 (3)	2026/02/04 16:30
[PATCH] KVM: guest_memfd: Reject large folios until support is implemented	1 (1)	2026/02/03 02:09

Title

Replies (including bot)

Last reply

[PATCH] mm: thp: Deny THP for guest_memfd and secretmem in file_thp_enabled()

29 (29)

2026/02/21 04:37

[PATCH v2] mm: thp: deny THP for files on anonymous inodes

10 (10)

2026/02/20 23:59

[PATCH v2 0/2] Test MADV_COLLAPSE on guest_memfd

3 (3)

2026/02/20 23:54

[syzbot] [kvm?] WARNING in kvm_gmem_fault_user_mapping

0 (12)

2026/02/13 15:43

[PATCH] KVM: guest_memfd: Disable VMA merging with VM_DONTEXPAND

10 (11)

2026/02/09 19:38

[PATCH 1/2] KVM: guest_memfd: Always use order 0 when allocating for guest_memfd

3 (3)

2026/02/04 16:30

[PATCH] KVM: guest_memfd: Reject large folios until support is implemented

1 (1)

2026/02/03 02:09


Created	Duration	User	Patch	Repo	Result
2026/02/13 15:43	25m	kartikey406@gmail.com	patch	upstream	OK log
2026/02/12 23:21	1h24m	retest repro		upstream	report log
2026/02/12 23:21	1h10m	retest repro		linux-next	report log
2026/02/09 13:11	25m	kartikey406@gmail.com	patch	upstream	OK log
2026/02/09 02:02	52m	kartikey406@gmail.com	patch	upstream	OK log
2026/02/09 01:55	37m	kartikey406@gmail.com	patch	upstream	report log
2026/02/04 17:01	34m	ackerleytng@google.com	patch	git://git.kernel.org/pub/scm/virt/kvm/kvm.git next	OK log
2026/02/03 20:06	1h16m	ackerleytng@google.com	patch	git://git.kernel.org/pub/scm/virt/kvm/kvm.git next	error
2026/02/02 15:11	1h07m	kartikey406@gmail.com	patch	upstream	OK log
2026/02/02 08:34	20m	kartikey406@gmail.com	patch	upstream	report log
2026/02/01 11:08	23m	kartikey406@gmail.com	patch	upstream	report log
2026/02/01 07:48	24m	kartikey406@gmail.com	patch	upstream	report log
2026/02/01 05:48	33m	kartikey406@gmail.com	patch	upstream	OK log
2026/02/01 04:57	39m	kartikey406@gmail.com	patch	upstream	report log

------------[ cut here ]------------ folio_test_large(folio) WARNING: arch/x86/kvm/../../../virt/kvm/guest_memfd.c:416 at kvm_gmem_fault_user_mapping+0x4b5/0x6e0 virt/kvm/guest_memfd.c:416, CPU#1: syz.3.124/6406 Modules linked in: CPU: 1 UID: 0 PID: 6406 Comm: syz.3.124 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 RIP: 0010:kvm_gmem_fault_user_mapping+0x4b5/0x6e0 virt/kvm/guest_memfd.c:416 Code: 00 e9 a1 fe ff ff bd 00 04 00 00 eb d9 e8 43 b8 83 00 48 c7 c6 e0 9f 82 8b 48 89 df e8 d4 f8 ce 00 90 0f 0b e8 2c b8 83 00 90 <0f> 0b 90 48 8d 6b 34 48 89 df e8 ec f6 bb 00 be 04 00 00 00 48 89 RSP: 0018:ffffc90004ab7848 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea00018a0000 RCX: ffffffff81834070 RDX: ffff888028b124c0 RSI: ffffffff81834334 RDI: ffff888028b124c0 RBP: ffffc90004ab79f8 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000040 R11: 0000000000000000 R12: ffffea00018a0000 R13: ffffc90004ab7a08 R14: 0000000000000040 R15: ffffea00018a0008 FS: 00007fb8562ce6c0(0000) GS:ffff8881246db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f89fb863d58 CR3: 000000006060a000 CR4: 00000000003526f0 Call Trace: <TASK> __do_fault+0x10d/0x550 mm/memory.c:5323 do_read_fault mm/memory.c:5758 [inline] do_fault+0xaf9/0x1990 mm/memory.c:5892 do_pte_missing mm/memory.c:4404 [inline] handle_pte_fault mm/memory.c:6276 [inline] __handle_mm_fault+0x1807/0x2b50 mm/memory.c:6414 handle_mm_fault+0x36d/0xa20 mm/memory.c:6583 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0xf9c/0x34d0 mm/gup.c:1428 populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860 __mm_populate+0x107/0x3a0 mm/gup.c:1963 do_mlock+0x3f0/0x7f0 mm/mlock.c:653 __do_sys_mlock mm/mlock.c:661 [inline] __se_sys_mlock mm/mlock.c:659 [inline] __x64_sys_mlock+0x59/0x80 mm/mlock.c:659 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb85539aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb8562ce028 EFLAGS: 00000246 ORIG_RAX: 0000000000000095 RAX: ffffffffffffffda RBX: 00007fb855615fa0 RCX: 00007fb85539aeb9 RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000200000000000 RBP: 00007fb855408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb855616038 R14: 00007fb855615fa0 R15: 00007ffcc1750088 </TASK>

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/28 22:31	upstream	1f97d9dcf536	004c195c	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	WARNING in kvm_gmem_fault_user_mapping
2026/01/29 22:58	linux-next	33a647c659ff	aeb6fdd5	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-rust-kasan-gce	WARNING in kvm_gmem_fault_user_mapping
2026/01/28 21:02	upstream	1f97d9dcf536	004c195c	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	WARNING in kvm_gmem_fault_user_mapping

Crashes (3):

Assets (help?)