WARNING in path_openat (5)

Status: upstream: reported on 2026/08/05 05:07
Reported-by: syzbot+ef6c9dd6b509d468116e@syzkaller.appspotmail.com
First crash: 1d17h, last: 1d17h
Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in path_openat (4) -1 4 190d 320d 0/3 auto-obsoleted due to no activity on 2026/05/08 20:53
linux-5.15 WARNING in path_openat -1 2 1143d 1193d 0/3 auto-obsoleted due to no activity on 2023/09/28 05:21
upstream WARNING in path_openat prio:high fs -1 syz, C error done 212 5d16h 1343d 0/29 upstream: reported C repro on 2022/12/02 03:18
linux-5.15 WARNING in path_openat (3) origin:lts-only -1 syz, C error 4 42d 622d 0/3 upstream: reported C repro on 2024/11/22 02:14
linux-6.1 WARNING in path_openat (2) -1 12 647d 829d 0/3 auto-obsoleted due to no activity on 2025/02/05 09:53
linux-6.1 WARNING in path_openat (3) -1 1 472d 472d 0/3 auto-obsoleted due to no activity on 2025/07/30 00:00
linux-6.1 WARNING in path_openat -1 5 999d 1197d 0/3 auto-obsoleted due to no activity on 2024/02/19 01:27
linux-5.15 WARNING in path_openat (2) -1 4 791d 823d 0/3 auto-obsoleted due to no activity on 2024/09/14 06:15

Sample crash report:
WARNING: CPU: 1 PID: 4772 at kernel/locking/rwsem.c:1345 __up_read+0x628/0x6b0 kernel/locking/rwsem.c:1345
Modules linked in:
CPU: 1 PID: 4772 Comm: syz.1.157 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__up_read+0x628/0x6b0 kernel/locking/rwsem.c:1345
Code: 0f 44 d0 48 c7 c7 20 0b 8c 8a 48 c7 c6 c0 0b 8c 8a 48 89 da 48 8b 4c 24 08 4d 89 e0 4d 89 f1 41 52 e8 cc 4f ea ff 48 83 c4 08 <0f> 0b 4c 8b 3c 24 e9 40 fb ff ff 48 c7 c1 a8 3f 21 8e 80 e1 07 80
RSP: 0018:ffffc900033478e0 EFLAGS: 00010292
RAX: 949236f6b8596300 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000eac2000 RSI: 0000000000008189 RDI: 000000000000818a
RBP: ffffc90003347990 R08: ffffc90003347567 R09: 1ffff92000668eac
R10: dffffc0000000000 R11: fffff52000668ead R12: 0000000000000000
R13: 1ffff92000668f20 R14: ffff88807f841e00 R15: ffff8880727d99a8
FS:  00007f5deba906c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f990f96b000 CR3: 000000007c738000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock_shared include/linux/fs.h:773 [inline]
 open_last_lookups fs/namei.c:3564 [inline]
 path_openat+0x13b1/0x2f10 fs/namei.c:3788
 do_filp_open+0x1ee/0x420 fs/namei.c:3818
 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5deab9e019
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:00007f5deba90028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5deae26090 RCX: 00007f5deab9e019
RDX: 0000000000000000 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f5deac3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000081 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5deae26128 R14: 00007f5deae26090 R15: 00007fffce2eff98
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/05 05:06 linux-6.1.y fb28aa725e05 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
* Struck through repros no longer work on HEAD.