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general protection fault in fuse_atomic_open

Status: upstream: reported C repro on 2023/07/16 23:36
Reported-by: syzbot+8e06855e2fa000e0c107@syzkaller.appspotmail.com
First crash: 969d, last: 9d17h
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 general protection fault in fuse_atomic_open origin:downstream 2 C done 21 2d11h 969d 0/2 upstream: reported C repro on 2023/07/17 00:03
android-5-15 general protection fault in fuse_atomic_open (2) origin:downstream 2 C done 35 1d21h 957d 0/2 upstream: reported C repro on 2023/07/29 15:55
android-5-15 general protection fault in fuse_atomic_open 2 1 1075d 1075d 0/2 auto-obsoleted due to no activity on 2023/07/01 15:58
android-6-12 general protection fault in fuse_atomic_open origin:downstream 2 C 14 12d 202d 0/1 premoderation: reported C repro on 2025/08/22 12:42
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/01/28 14:11 6m retest repro android13-5.10-lts report log
2026/01/28 14:11 5m retest repro android13-5.10-lts report log
2026/01/28 14:11 8m retest repro android13-5.10-lts report log
2026/01/28 14:11 5m retest repro android13-5.10-lts report log
2025/11/28 19:21 15m retest repro android13-5.10-lts report log
2025/11/28 19:21 43m retest repro android13-5.10-lts report log
2025/11/28 19:21 8m retest repro android13-5.10-lts report log
2025/11/28 19:21 7m retest repro android13-5.10-lts report log
2025/11/28 19:21 5m retest repro android13-5.10-lts report log
2025/10/29 16:52 5m retest repro android13-5.10-lts report log
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2026/01/06 09:36 1h33m bisect fix android13-5.10-lts OK (0) job log log
2024/03/06 12:22 33m bisect fix android13-5.10-lts OK (0) job log log
2023/10/26 04:01 44m bisect fix android13-5.10-lts OK (0) job log log
2023/09/26 01:12 33m bisect fix android13-5.10-lts OK (0) job log log

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 364 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x2c8/0x2250 fs/fuse/dir.c:853
Code: 75 ff 44 89 f0 83 e0 40 4c 8b 74 24 10 75 07 e8 0e e2 75 ff eb 32 4c 89 3c 24 48 8b 44 24 40 4c 8d 78 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 f9 62 b0 ff 49 83 3f 00 74 5b e8
RSP: 0018:ffffc90000dc7380 EFLAGS: 00010203
RAX: 0000000000000008 RBX: fffff520001b8e84 RCX: 0000000000000000
RDX: ffff88810ddb4f00 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000dc7990 R08: ffff88810ddb4f00 R09: fffff520001b8de4
R10: 00000000fffffffe R11: 0000000000000000 R12: ffff88810f5d1000
R13: dffffc0000000000 R14: ffff888126e19f80 R15: 0000000000000047
FS:  00007f3a35d056c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000b000 CR3: 0000000128a4c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 atomic_open fs/namei.c:3122 [inline]
 lookup_open fs/namei.c:3227 [inline]
 open_last_lookups fs/namei.c:3325 [inline]
 path_openat+0xf99/0x31c0 fs/namei.c:3514
 do_filp_open+0x1e2/0x410 fs/namei.c:3544
 do_sys_openat2+0x19f/0x750 fs/open.c:1219
 do_sys_open fs/open.c:1235 [inline]
 __do_sys_openat fs/open.c:1251 [inline]
 __se_sys_openat fs/open.c:1246 [inline]
 __x64_sys_openat+0x136/0x160 fs/open.c:1246
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3a35ea2629
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:00007f3a35d05028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3a3611bfa0 RCX: 00007f3a35ea2629
RDX: 0000000000040643 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f3a35f38b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a3611c038 R14: 00007f3a3611bfa0 R15: 00007ffc096e8b18
Modules linked in:
---[ end trace e42936b4c277a55e ]---
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x2c8/0x2250 fs/fuse/dir.c:853
Code: 75 ff 44 89 f0 83 e0 40 4c 8b 74 24 10 75 07 e8 0e e2 75 ff eb 32 4c 89 3c 24 48 8b 44 24 40 4c 8d 78 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 f9 62 b0 ff 49 83 3f 00 74 5b e8
RSP: 0018:ffffc90000dc7380 EFLAGS: 00010203
RAX: 0000000000000008 RBX: fffff520001b8e84 RCX: 0000000000000000
RDX: ffff88810ddb4f00 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000dc7990 R08: ffff88810ddb4f00 R09: fffff520001b8de4
R10: 00000000fffffffe R11: 0000000000000000 R12: ffff88810f5d1000
R13: dffffc0000000000 R14: ffff888126e19f80 R15: 0000000000000047
FS:  00007f3a35d056c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a35eefd40 CR3: 0000000128a4c000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	75 ff                	jne    0x1
   2:	44 89 f0             	mov    %r14d,%eax
   5:	83 e0 40             	and    $0x40,%eax
   8:	4c 8b 74 24 10       	mov    0x10(%rsp),%r14
   d:	75 07                	jne    0x16
   f:	e8 0e e2 75 ff       	call   0xff75e222
  14:	eb 32                	jmp    0x48
  16:	4c 89 3c 24          	mov    %r15,(%rsp)
  1a:	48 8b 44 24 40       	mov    0x40(%rsp),%rax
  1f:	4c 8d 78 30          	lea    0x30(%rax),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 f9 62 b0 ff       	call   0xffb06332
  39:	49 83 3f 00          	cmpq   $0x0,(%r15)
  3d:	74 5b                	je     0x9a
  3f:	e8                   	.byte 0xe8

Crashes (90):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/18 12:31 android13-5.10-lts e8b14e1cefe8 39751c21 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/02/08 02:45 android13-5.10-lts 58c592510fcd 4c131dc4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/02/01 21:14 android13-5.10-lts 186f761c519d 6b8752f2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/10/08 03:25 android13-5.10-lts 2ece552169c2 7e2882b3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/09/17 19:55 android13-5.10-lts 911f602c2237 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/05/30 20:20 android13-5.10-lts cf6ed0f1511d 3d2f584d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/04/04 05:12 android13-5.10-lts 094fc3778d6b d7ae3a11 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/01/30 23:15 android13-5.10-lts fbe98d68b6b3 4c6ac32f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/10/21 09:49 android13-5.10-lts e5e5644ea27f cd6fc0a3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/07/07 04:57 android13-5.10-lts 3feee789f446 2a40360c .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/03/17 16:26 android13-5.10-lts dd976ecce2ce d615901c .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/11/07 06:04 android13-5.10-lts d30b996835c0 83211397 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/07/16 23:27 android13-5.10-lts 59b65efafe20 35d9ecc5 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/03/03 05:27 android13-5.10-lts dad37bbb13a8 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/02/05 18:07 android13-5.10-lts 58c592510fcd 4936e85c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/02/01 20:33 android13-5.10-lts 186f761c519d 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2026/01/14 14:08 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/12/05 02:57 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/12/01 00:39 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/11/10 15:19 android13-5.10-lts ab3e1c0dd1ff 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/11/09 21:51 android13-5.10-lts ab3e1c0dd1ff 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/11/02 11:55 android13-5.10-lts ab3e1c0dd1ff 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/11/01 16:54 android13-5.10-lts ab3e1c0dd1ff 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/10/15 05:16 android13-5.10-lts 2ece552169c2 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/10/09 23:35 android13-5.10-lts 2ece552169c2 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/09/26 12:07 android13-5.10-lts 911f602c2237 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/09/20 18:48 android13-5.10-lts 911f602c2237 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/09/17 19:01 android13-5.10-lts 911f602c2237 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/08/29 18:01 android13-5.10-lts 1154f779f3f3 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/08/14 01:20 android13-5.10-lts 1154f779f3f3 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/08/10 22:11 android13-5.10-lts 1154f779f3f3 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/07/26 02:26 android13-5.10-lts ad9a98ef27a4 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/06/18 10:49 android13-5.10-lts d76d4cd0623a e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/05/16 16:51 android13-5.10-lts 7e2543346ff7 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/04/27 21:35 android13-5.10-lts ba8b8b193394 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/04/03 23:37 android13-5.10-lts 094fc3778d6b d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/04/03 03:18 android13-5.10-lts 094fc3778d6b c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/03/25 15:59 android13-5.10-lts 094fc3778d6b 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/02/28 03:07 android13-5.10-lts 3f5f2283d684 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/02/19 22:44 android13-5.10-lts 6686f2996d23 b257a9b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2025/01/30 22:38 android13-5.10-lts fbe98d68b6b3 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/12/31 17:58 android13-5.10-lts 49e8ba0a684f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/12/28 22:57 android13-5.10-lts 4055d754db6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/12/26 02:56 android13-5.10-lts 4055d754db6f 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/11/25 08:51 android13-5.10-lts b14940b90491 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/11/24 05:25 android13-5.10-lts b14940b90491 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/11/23 18:38 android13-5.10-lts b14940b90491 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/10/21 09:28 android13-5.10-lts e5e5644ea27f cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/10/02 15:42 android13-5.10-lts 1e85e7850fed 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/09/28 05:42 android13-5.10-lts 8d23314f588a 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/09/23 00:09 android13-5.10-lts 8d23314f588a 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/09/19 05:46 android13-5.10-lts 8d23314f588a c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/09/03 22:02 android13-5.10-lts 1c5354a314ea 326f9c5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/09/01 07:56 android13-5.10-lts 1c5354a314ea 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/25 15:29 android13-5.10-lts 0890c03b8b7d d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/21 03:10 android13-5.10-lts 0890c03b8b7d 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/15 13:40 android13-5.10-lts 0890c03b8b7d e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/11 14:05 android13-5.10-lts fd58936f3c1f 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/10 12:06 android13-5.10-lts fd58936f3c1f 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/04 20:54 android13-5.10-lts fd58936f3c1f 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2024/08/04 20:40 android13-5.10-lts fd58936f3c1f 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/12/30 13:23 android13-5.10-lts f7977422e132 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/12/06 12:19 android13-5.10-lts 02a4d4a11d37 858d62d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/11/07 05:39 android13-5.10-lts d30b996835c0 83211397 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/08/11 00:03 android13-5.10-lts 8a427269c016 da3c3ef8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
2023/07/16 23:08 android13-5.10-lts 59b65efafe20 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in fuse_atomic_open
* Struck through repros no longer work on HEAD.