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WARNING in __v9fs_get_acl

Status: upstream: reported C repro on 2023/03/13 03:41
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+099b12b91b0072764f65@syzkaller.appspotmail.com
First crash: 1176d, last: 1d01h
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/04/20 linux-5.15.y (ToT) c52b9710c83d C [report] WARNING in __v9fs_get_acl
2023/05/09 upstream (ToT) ba0ad6ed89fd C [report] WARNING in v9fs_fid_get_acl
2024/04/20 upstream (ToT) 977b1ef51866 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in __v9fs_get_acl origin:upstream missing-backport -1 C error 2092 31d 1176d 0/3 upstream: reported C repro on 2023/03/13 04:51
upstream WARNING in __v9fs_get_acl v9fs -1 C done error 224 1242d 1750d 0/29 auto-obsoleted due to no activity on 2024/06/22 13:42
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/05/22 18:13 17m retest repro linux-5.15.y report log
2026/05/22 18:13 30m retest repro linux-5.15.y report log
2026/05/22 18:13 26m retest repro linux-5.15.y report log
2026/05/22 18:13 20m retest repro linux-5.15.y report log
2026/05/22 18:13 39m retest repro linux-5.15.y report log
2026/05/07 04:02 18m retest repro linux-5.15.y report log
2026/05/07 04:02 17m retest repro linux-5.15.y report log
2026/05/07 04:02 15m retest repro linux-5.15.y report log
2026/05/07 04:02 18m retest repro linux-5.15.y report log
2026/05/07 04:02 14m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (10)
Created Duration User Patch Repo Result
2026/05/19 01:46 12m fix candidate upstream error job log
2026/03/26 02:35 19m fix candidate upstream error job log
2026/02/22 02:28 3m fix candidate upstream error job log
2026/01/22 13:34 1m fix candidate upstream error job log
2025/09/29 13:21 12h05m fix candidate upstream error job log
2025/06/17 07:08 12h14m fix candidate upstream error job log
2025/04/16 06:43 12h01m fix candidate upstream error job log
2025/02/28 02:00 12h00m fix candidate upstream error job log
2024/12/01 23:16 12h12m fix candidate upstream error job log
2024/08/08 17:32 12h01m fix candidate upstream error job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4404 at mm/page_alloc.c:5476 current_gfp_context include/linux/sched/mm.h:-1 [inline]
WARNING: CPU: 0 PID: 4404 at mm/page_alloc.c:5476 __alloc_pages+0x39f/0x480 mm/page_alloc.c:5488
Modules linked in:
CPU: 1 PID: 4404 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__alloc_pages+0x39f/0x480 mm/page_alloc.c:5476
Code: 31 ff e9 b1 fe ff ff e8 5f 52 08 08 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 4f fd ff ff 4c 89 e7 e8 76 cd 09 00 e9 42 fd ff ff <0f> 0b 45 31 ff e9 ee fe ff ff 65 44 8b 2d e7 8d 4d 7e 41 83 fd 08
RSP: 0018:ffffc9000329fb20 EFLAGS: 00010246
RAX: ffffc9000329fb60 RBX: 1ffff92000653f68 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc9000329fb88
RBP: ffffc9000329fc18 R08: ffffc9000329fb87 R09: ffffc9000329fb60
R10: dffffc0000000000 R11: fffff52000653f71 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000040d40 R15: 0000000000000026
FS:  000055555f1fa500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562b88e81950 CR3: 000000007267d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kmalloc_order+0x40/0x150 mm/slab_common.c:986
 kmalloc_order_trace+0x14/0xf0 mm/slab_common.c:1002
 kmalloc include/linux/slab.h:612 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 __v9fs_get_acl+0x40/0x110 fs/9p/acl.c:36
 v9fs_get_acl+0xa9/0x260 fs/9p/acl.c:71
 v9fs_mount+0x6c0/0x850 fs/9p/vfs_super.c:184
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0a60193e59
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:00007fff5ea5c618 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0a6040cfa0 RCX: 00007f0a60193e59
RDX: 0000200000000b80 RSI: 00002000000003c0 RDI: 0000000000000000
RBP: 00007f0a60229d6f R08: 0000200000000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0a6040cfac R14: 00007f0a6040cfa0 R15: 00007f0a6040cfa0
 </TASK>

Crashes (1292):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/01 01:22 linux-5.15.y 241d66fa280c 6b4a8443 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/12/30 23:19 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/17 14:05 linux-5.15.y 43bb85222e53 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/03 19:22 linux-5.15.y c79648372d02 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2024/08/31 16:06 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2024/08/31 14:51 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2024/04/22 18:34 linux-5.15.y c52b9710c83d 36c961ad .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2024/01/12 12:34 linux-5.15.y 26c690eff0a5 dda5a988 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/12/17 01:42 linux-5.15.y d0fc081c6241 3222d10c .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/11/13 16:19 linux-5.15.y 80529b4968a8 6d6dbf8a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/07/06 02:32 linux-5.15.y 4af60700a60c ba5dba36 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/03/27 08:22 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/30 12:01 linux-5.15.y c79648372d02 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/04/19 18:33 linux-5.15.y f7347f400572 2a20f901 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/04/19 16:56 linux-5.15.y f7347f400572 2a20f901 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2024/12/12 10:55 linux-5.15.y 0a51d2d4527b 6f1b0fa8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2024/05/19 07:12 linux-5.15.y 83655231580b c0f1611a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2024/05/04 16:56 linux-5.15.y 284087d4f7d5 610f2a54 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2024/04/22 17:52 linux-5.15.y c52b9710c83d 36c961ad .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2023/07/31 10:51 linux-5.15.y 09996673e313 2a0d0f29 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2023/07/18 12:13 linux-5.15.y d54cfc420586 20f8b3c2 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2023/03/13 08:47 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2023/03/27 02:57 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/03/13 08:10 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2023/03/13 03:59 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2026/05/31 23:56 linux-5.15.y 241d66fa280c 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/03/27 11:32 linux-5.15.y 91d48252ad4b 766b6434 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/03/22 20:13 linux-5.15.y 91d48252ad4b 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/03/08 14:53 linux-5.15.y 91d48252ad4b 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/03/02 00:17 linux-5.15.y 3330a8d33e08 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/03/01 21:10 linux-5.15.y 3330a8d33e08 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/02/22 00:13 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/01/15 21:13 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/01/05 02:09 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/01/04 14:31 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2026/01/02 17:10 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/12/30 22:02 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/12/12 09:02 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/11/12 07:17 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/11/06 13:27 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/27 06:15 linux-5.15.y 43bb85222e53 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/25 07:33 linux-5.15.y 43bb85222e53 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/13 22:35 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/13 19:59 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/13 15:43 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/09/07 20:20 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/28 05:52 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/27 00:09 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/18 22:21 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/16 09:53 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/15 18:55 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/10 23:37 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/02 14:26 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/28 07:43 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/27 14:29 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/27 05:10 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/24 22:08 linux-5.15.y c79648372d02 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/07/23 11:53 linux-5.15.y c79648372d02 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in __v9fs_get_acl
2025/08/16 14:49 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/08/16 03:02 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/08/03 17:25 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/08/03 09:37 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/08/02 10:53 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/08/02 10:53 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/07/30 10:39 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/07/28 01:41 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/07/27 11:53 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2025/07/24 18:12 linux-5.15.y c79648372d02 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
2023/03/13 03:40 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in __v9fs_get_acl
* Struck through repros no longer work on HEAD.