syzbot

 sign-in | mailing list | source | docs
🐞 Open [119]
🐞 Fixed [69]
🐞 Invalid [267]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

BUG: unable to handle kernel paging request in fuse_dev_do_write (4)

Status: premoderation: reported syz repro on 2025/11/15 21:25
Reported-by: syzbot+1dfdb08eaef3039a9bc5@syzkaller.appspotmail.com
First crash: 57d, last: 52m
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write 8 18 914d 979d 0/2 auto-obsoleted due to no activity on 2023/09/03 17:45
android-54 BUG: unable to handle kernel paging request in fuse_dev_do_write 8 C 213 257d 1853d 0/2 upstream: reported C repro on 2020/12/15 11:21
android-49 BUG: unable to handle kernel paging request in fuse_dev_do_write 8 C 46 2277d 2466d 0/3 public: reported C repro on 2019/04/13 00:00
android-5-15 BUG: unable to handle kernel paging request in fuse_dev_do_write 8 2 915d 916d 0/2 auto-obsoleted due to no activity on 2023/10/10 01:15
android-5-15 BUG: unable to handle kernel paging request in fuse_dev_do_write (2) 8 4 17d 40d 0/2 premoderation: reported on 2025/12/02 15:32
android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write (2) 8 1 778d 778d 0/2 auto-obsoleted due to no activity on 2024/02/23 07:02
android-6-1 BUG: unable to handle kernel paging request in fuse_dev_do_write origin:downstream 8 C done error 58 4d07h 969d 0/2 upstream: reported C repro on 2023/05/18 20:01
android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write (3) 8 1 658d 658d 0/2 auto-obsoleted due to no activity on 2024/06/22 11:39
upstream KASAN: slab-out-of-bounds Write in fuse_dev_do_write fuse 23 C 6 137d 142d 29/29 fixed on 2025/10/29 21:02

Sample crash report:
BUG: unable to handle page fault for address: ffffed10484b97ff
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff2067 P4D 23fff2067 PUD 23fff0067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4945 Comm: syz.9.1624 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fuse_dev_do_write+0xe65/0x2af0 fs/fuse/dev.c:1953
Code: c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 0f b6 04 20 84 c0 0f 85 76 1a 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 77 1a 00 00 41 c6 07 00 41 bf a0 00 00
RSP: 0018:ffffc90001ec7900 EFLAGS: 00010a07
RAX: 1ffff110484b97ff RBX: 1ffff11025102e8e RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000000007e0 RDI: 00000000000007e0
RBP: ffffc90001ec7c08 R08: dffffc0000000000 R09: fffff940009fca97
R10: fffff940009fca97 R11: 1ffffd40009fca96 R12: dffffc0000000000
R13: 1ffff11025102e8b R14: ffff8881425cc000 R15: ffff8882425cbfff
FS:  00007f9f266c56c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed10484b97ff CR3: 000000012bfa8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0xde/0x140 fs/fuse/dev.c:2003
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x725/0xd60 fs/read_write.c:605
 ksys_write+0x140/0x240 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9f26876749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f266c5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9f26acd090 RCX: 00007f9f26876749
RDX: 0000000000000010 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007f9f268faf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f26acd128 R14: 00007f9f26acd090 R15: 00007ffcd56576d8
Modules linked in:
CR2: ffffed10484b97ff
---[ end trace 5d5f973af5ba2d6d ]---
RIP: 0010:fuse_dev_do_write+0xe65/0x2af0 fs/fuse/dev.c:1953
Code: c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 0f b6 04 20 84 c0 0f 85 76 1a 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 77 1a 00 00 41 c6 07 00 41 bf a0 00 00
RSP: 0018:ffffc90001ec7900 EFLAGS: 00010a07
RAX: 1ffff110484b97ff RBX: 1ffff11025102e8e RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000000007e0 RDI: 00000000000007e0
RBP: ffffc90001ec7c08 R08: dffffc0000000000 R09: fffff940009fca97
R10: fffff940009fca97 R11: 1ffffd40009fca96 R12: dffffc0000000000
R13: 1ffff11025102e8b R14: ffff8881425cc000 R15: ffff8882425cbfff
FS:  00007f9f266c56c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed10484b97ff CR3: 000000012bfa8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
   a:	fc ff df
   d:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax
  12:	84 c0                	test   %al,%al
  14:	0f 85 76 1a 00 00    	jne    0x1a90
  1a:	45 8b 3f             	mov    (%r15),%r15d
  1d:	41 ff cf             	dec    %r15d
  20:	4d 01 f7             	add    %r14,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 77 1a 00 00    	jne    0x1aae
  37:	41 c6 07 00          	movb   $0x0,(%r15)
  3b:	41                   	rex.B
  3c:	bf                   	.byte 0xbf
  3d:	a0                   	.byte 0xa0

Crashes (126):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/12 01:46 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/08 03:23 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/06 07:22 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/30 11:21 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/27 07:06 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/23 05:22 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/13 08:05 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/08 06:26 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/05 12:43 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/11 18:44 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/11 15:03 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/11 08:06 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/11 03:27 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 21:19 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 14:03 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 11:25 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 09:50 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 07:02 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 03:07 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/10 00:40 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/09 19:55 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/09 12:18 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/08 18:36 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/08 14:26 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/08 09:47 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/08 05:56 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/07 21:03 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/07 04:41 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/06 21:09 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/06 18:59 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/06 10:11 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/06 07:12 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/05 22:16 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/05 16:19 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/04 17:28 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/04 04:17 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/04 00:25 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/03 15:43 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/03 01:35 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/03 00:32 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/02 22:36 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/02 16:25 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/02 00:09 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/01 22:10 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/01 17:55 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/01 16:31 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/01 10:47 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2026/01/01 08:24 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 20:04 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 18:19 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 16:53 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 14:23 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 02:52 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/31 00:27 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
2025/12/30 14:21 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in fuse_dev_do_write
* Struck through repros no longer work on HEAD.