syzbot


WARNING in path_openat (4)

Status: upstream: reported on 2025/09/20 10:29
Reported-by: syzbot+c384b4b66951788282e7@syzkaller.appspotmail.com
First crash: 61d, last: 57d
Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in path_openat -1 2 884d 934d 0/3 auto-obsoleted due to no activity on 2023/09/28 05:21
upstream WARNING in path_openat fs -1 C error done 166 6d16h 1084d 0/29 upstream: reported C repro on 2022/12/02 03:18
linux-5.15 WARNING in path_openat (3) origin:lts-only -1 C error 4 5h25m 363d 0/3 upstream: reported C repro on 2024/11/22 02:14
linux-6.1 WARNING in path_openat (2) -1 12 388d 570d 0/3 auto-obsoleted due to no activity on 2025/02/05 09:53
linux-6.1 WARNING in path_openat (3) -1 1 213d 213d 0/3 auto-obsoleted due to no activity on 2025/07/30 00:00
linux-6.1 WARNING in path_openat -1 5 740d 938d 0/3 auto-obsoleted due to no activity on 2024/02/19 01:27
linux-5.15 WARNING in path_openat (2) -1 4 532d 564d 0/3 auto-obsoleted due to no activity on 2024/09/14 06:15

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888050858330, owner = 0x0, curr 0xffff88802d51bb80, list empty
WARNING: CPU: 1 PID: 5329 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 5329 at kernel/locking/rwsem.c:1372 up_write+0x3a1/0x420 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 5329 Comm: syz.6.240 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__up_write kernel/locking/rwsem.c:1371 [inline]
RIP: 0010:up_write+0x3a1/0x420 kernel/locking/rwsem.c:1626
Code: 44 d0 48 c7 c7 80 f8 8b 8a 48 c7 c6 c0 fa 8b 8a 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 08 41 52 e8 93 93 ea ff 48 83 c4 08 <0f> 0b e9 6b fd ff ff 48 c7 c1 a8 aa 1f 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90003407950 EFLAGS: 00010296
RAX: 223c65582ab89d00 RBX: ffff888050858330 RCX: 0000000000080000
RDX: ffffc9000ee31000 RSI: 00000000000126c6 RDI: 00000000000126c7
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffff52000680eb9
R10: fffff52000680eb9 R11: 1ffff92000680eb8 R12: 0000000000000000
R13: ffff888050858388 R14: ffff888050858330 R15: 1ffff1100a10b067
FS:  00007f84fddd56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f33a45b57b0 CR3: 000000005d9d0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:763 [inline]
 open_last_lookups fs/namei.c:3554 [inline]
 path_openat+0x14e7/0x2e70 fs/namei.c:3780
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3810
 do_sys_openat2+0x142/0x490 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f84ffb8eec9
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:00007f84fddd5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f84ffde6090 RCX: 00007f84ffb8eec9
RDX: 0000000000000040 RSI: 000020000000c380 RDI: ffffffffffffff9c
RBP: 00007f84ffc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f84ffde6128 R14: 00007f84ffde6090 R15: 00007ffde039ee68
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/24 09:33 linux-6.1.y 363a599da6d9 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in path_openat
2025/09/20 10:28 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in path_openat
* Struck through repros no longer work on HEAD.