------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current)
WARNING: CPU: 1 PID: 8496 at kernel/locking/rtmutex_common.h:182 debug_rt_mutex_unlock kernel/locking/rtmutex_common.h:182 [inline]
WARNING: CPU: 1 PID: 8496 at kernel/locking/rtmutex_common.h:182 rt_mutex_slowunlock+0x6ce/0x8a0 kernel/locking/rtmutex.c:1419
Modules linked in:
CPU: 1 UID: 0 PID: 8496 Comm: syz.7.372 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_rt_mutex_unlock kernel/locking/rtmutex_common.h:182 [inline]
RIP: 0010:rt_mutex_slowunlock+0x6ce/0x8a0 kernel/locking/rtmutex.c:1419
Code: 0f b6 04 20 84 c0 0f 85 c6 01 00 00 83 3d 3d 4b 14 04 00 75 19 90 48 c7 c7 a0 fd ea 8a 48 c7 c6 e0 fd ea 8a e8 f3 16 c1 f6 90 <0f> 0b 90 90 90 e9 2f fa ff ff 90 0f 0b 90 e9 53 fe ff ff be 02 00
RSP: 0018:ffffc9000593fbc0 EFLAGS: 00010046
RAX: 03d6cdfe380e7100 RBX: ffff8880609fd080 RCX: 0000000000080000
RDX: ffffc9001598f000 RSI: 0000000000000b66 RDI: 0000000000000b67
RBP: ffffc9000593fca8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101712487b R12: dffffc0000000000
R13: ffff8880609fd030 R14: 0000000000000a02 R15: 1ffff92000b27f80
FS: 00007f4085eb56c0(0000) GS:ffff888126efc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4085e93f98 CR3: 0000000026032000 CR4: 00000000003526f0
Call Trace:
<TASK>
inode_unlock include/linux/fs.h:990 [inline]
__unlock_mount fs/namespace.c:2789 [inline]
unlock_mount+0xbd/0x3a0 fs/namespace.c:2799
do_loopback+0x397/0x410 fs/namespace.c:3008
do_mount fs/namespace.c:4050 [inline]
__do_sys_mount fs/namespace.c:4238 [inline]
__se_sys_mount+0x313/0x410 fs/namespace.c:4215
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4087c6efc9
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:00007f4085eb5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4087ec6090 RCX: 00007f4087c6efc9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 00002000000002c0
RBP: 00007f4087cf1f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000109041 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4087ec6128 R14: 00007f4087ec6090 R15: 00007ffd8b2d1818
</TASK>