syzbot


WARNING in vfs_setxattr

Status: upstream: reported on 2025/07/16 17:24
Reported-by: syzbot+5afcaf8dfb7b1bb9aaa0@syzkaller.appspotmail.com
First crash: 45d, last: 45d
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in vfs_setxattr -1 12 90d 369d 0/3 upstream: reported on 2024/08/26 12:20
upstream WARNING in vfs_setxattr fs -1 1 967d 963d 0/29 auto-obsoleted due to no activity on 2023/04/06 11:38
linux-6.1 WARNING in vfs_setxattr -1 123 1d16h 505d 0/3 upstream: reported on 2024/04/12 18:51
upstream WARNING in vfs_setxattr (2) fs -1 1 807d 803d 0/29 auto-obsoleted due to no activity on 2023/09/13 15:16
upstream WARNING in vfs_setxattr (3) gfs2 -1 C 422 20h36m 15d 0/29 upstream: reported C repro on 2025/08/15 12:51

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88805003bd68, owner = 0x0, curr 0xffff88802c3fbc00, list empty
WARNING: CPU: 0 PID: 25119 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 25119 at kernel/locking/rwsem.c:1370 up_write+0x393/0x410 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 0 PID: 25119 Comm: syz.0.4796 Not tainted 6.6.98-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x393/0x410 kernel/locking/rwsem.c:1626
Code: 44 d0 48 c7 c7 e0 ac aa 8a 48 c7 c6 20 af aa 8a 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 08 41 52 e8 91 8e e9 ff 48 83 c4 08 <0f> 0b e9 7d fd ff ff 48 c7 c1 20 c8 4a 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90003497b90 EFLAGS: 00010296
RAX: b63d0e6f40745c00 RBX: ffff88805003bd68 RCX: 0000000000080000
RDX: ffffc9001825c000 RSI: 0000000000017e85 RDI: 0000000000017e86
RBP: dffffc0000000000 R08: ffffc90003497787 R09: 1ffff92000692ef0
R10: dffffc0000000000 R11: fffff52000692ef1 R12: 0000000000000000
R13: ffff88805003bdc0 R14: ffff88805003bd68 R15: 1ffff1100a0077ae
FS:  00007f862bcc46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000012b000 CR3: 000000005eb39000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:809 [inline]
 vfs_setxattr+0x17b/0x2f0 fs/xattr.c:324
 do_setxattr fs/xattr.c:630 [inline]
 path_setxattr+0x362/0x550 fs/xattr.c:659
 __do_sys_setxattr fs/xattr.c:677 [inline]
 __se_sys_setxattr fs/xattr.c:673 [inline]
 __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f862ad8e929
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:00007f862bcc4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f862afb6080 RCX: 00007f862ad8e929
RDX: 0000200000000640 RSI: 0000200000000240 RDI: 0000200000000200
RBP: 00007f862ae10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f862afb6080 R15: 00007ffd2e400d98
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/16 17:23 linux-6.6.y 9247f4e6573a 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in vfs_setxattr
* Struck through repros no longer work on HEAD.