kernel BUG in mark_free_pages

Status: upstream: reported C repro on 2026/10/05 05:28
Subsystems: pm
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+609c80047e3e808b465c@syzkaller.appspotmail.com
First crash: 20h37m, last: 7h21m
Cause bisection: failed (error log, bisect log)
  
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ID Workflow Result Correct Bug Created Started Finished Revision
6e5cf365 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ kernel BUG in mark_free_pages 2026/10/05 02:29 2026/10/05 02:29 2026/10/05 03:56 57bbd979
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Title Replies (including bot) Last reply
[syzbot] [pm?] kernel BUG in mark_free_pages 0 (1) 2026/10/05 05:28

Sample crash report:
Freezing user space processes
Freezing user space processes completed (elapsed 0.009 seconds)
OOM killer disabled.
PM: hibernation: Preallocating image memory
page:ffffea0005400000 is uninitialized and poisoned
page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page))
There is not page extension available.
------------[ cut here ]------------
kernel BUG at ./include/linux/mm.h:2402!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5632 Comm: syz-executor292 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
RIP: 0010:page_to_nid include/linux/mm.h:2402 [inline]
RIP: 0010:page_zone include/linux/mm.h:2622 [inline]
RIP: 0010:mark_free_pages+0x49a/0x4b0 kernel/power/snapshot.c:1266
Code: 5d e9 3a b9 44 0a e8 15 c9 22 00 90 0f 0b e8 0d fe 41 0a e8 08 c9 22 00 48 8b 7c 24 08 48 c7 c6 64 6c 48 8e e8 97 db 82 ff 90 <0f> 0b e8 ef c8 22 00 90 0f 0b e8 e7 c8 22 00 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc900035a7ad8 EFLAGS: 00010046
RAX: 26156de6b9890800 RBX: 0000000000010000 RCX: 26156de6b9890800
RDX: 0000000000000000 RSI: 8000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f6917a3 R09: 1ffffffff1ed22f4
R10: dffffc0000000000 R11: fffffbfff1ed22f5 R12: ffff88823fff8100
R13: 0000000000150000 R14: ffffffffffffffff R15: 0300000000000000
FS:  00007f23975186c0(0000) GS:ffff888124cc6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe53995418 CR3: 0000000021bc3000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 count_data_pages kernel/power/snapshot.c:1417 [inline]
 hibernate_preallocate_memory+0x14f/0x750 kernel/power/snapshot.c:1859
 hibernation_snapshot+0xd5/0x3d0 kernel/power/hibernate.c:416
 hibernate+0x28f/0x680 kernel/power/hibernate.c:813
 state_store+0x234/0x290 kernel/power/main.c:821
 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f23975400a9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f23975181d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f23975f0b48 RCX: 00007f23975400a9
RDX: 0000000000000005 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f23975f0b40 R08: 35203a6b63617473 R09: 35203a6b63617473
R10: 35203a6b63617473 R11: 0000000000000246 R12: 00007f23975c2378
R13: 0000200000000500 R14: 0000200000000600 R15: 00656e696c66666f
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:page_to_nid include/linux/mm.h:2402 [inline]
RIP: 0010:page_zone include/linux/mm.h:2622 [inline]
RIP: 0010:mark_free_pages+0x49a/0x4b0 kernel/power/snapshot.c:1266
Code: 5d e9 3a b9 44 0a e8 15 c9 22 00 90 0f 0b e8 0d fe 41 0a e8 08 c9 22 00 48 8b 7c 24 08 48 c7 c6 64 6c 48 8e e8 97 db 82 ff 90 <0f> 0b e8 ef c8 22 00 90 0f 0b e8 e7 c8 22 00 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc900035a7ad8 EFLAGS: 00010046
RAX: 26156de6b9890800 RBX: 0000000000010000 RCX: 26156de6b9890800
RDX: 0000000000000000 RSI: 8000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f6917a3 R09: 1ffffffff1ed22f4
R10: dffffc0000000000 R11: fffffbfff1ed22f5 R12: ffff88823fff8100
R13: 0000000000150000 R14: ffffffffffffffff R15: 0300000000000000
FS:  00007f23975186c0(0000) GS:ffff888124cc6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe53995418 CR3: 0000000021bc3000 CR4: 0000000000350ef0

Crashes (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/04 20:48 upstream 6addb4f38557 57bbd979 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in mark_free_pages
2026/10/05 04:59 linux-next f0406245cb98 57bbd979 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 21:01 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in mark_free_pages
2026/10/04 18:17 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 17:00 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in mark_free_pages
2026/10/04 16:59 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in mark_free_pages
2026/10/04 15:43 upstream 6addb4f38557 57bbd979 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel BUG in mark_free_pages
2026/10/04 17:57 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce kernel BUG in mark_free_pages
2026/10/04 16:26 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 16:26 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 16:19 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 16:08 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
2026/10/04 15:56 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in mark_free_pages
* Struck through repros no longer work on HEAD.