------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 0 PID: 20040 at kernel/locking/mutex.c:575 __mutex_lock_common+0x18fa/0x2390 kernel/locking/mutex.c:-1
Modules linked in:
CPU: 0 PID: 20040 Comm: syz.1.6603 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__mutex_lock_common+0x18fa/0x2390 kernel/locking/mutex.c:575
Code: 00 48 8d bc 24 e0 00 00 00 0f 85 47 e8 ff ff 48 c7 c7 c0 00 0b 8a 48 c7 c6 00 01 0b 8a e8 3e bc ec ff 48 8d bc 24 e0 00 00 00 <0f> 0b e9 25 e8 ff ff e8 ba ce 56 f7 e9 df fb ff ff 0f 0b e9 2d f0
RSP: 0018:ffffc900035ff660 EFLAGS: 00010246
RAX: ce2d29fb8765f200 RBX: ffffffff82010ba5 RCX: 0000000000080000
RDX: ffffc90004201000 RSI: 0000000000002cba RDI: ffffc900035ff740
RBP: ffffc900035ff7f0 R08: dffffc0000000000 R09: ffffed1017204f24
R10: ffffed1017204f24 R11: 1ffff11017204f23 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88807712f028 R15: 0000000000000000
FS:  00007f9fb8c806c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83d1a512d8 CR3: 000000001eae0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_lookup+0x137/0x420 fs/reiserfs/namei.c:364
 __lookup_slow+0x27d/0x3d0 fs/namei.c:1663
 lookup_slow+0x53/0x70 fs/namei.c:1680
 walk_component+0x319/0x460 fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2455
 filename_lookup+0x1e2/0x4f0 fs/namei.c:2484
 user_path_at_empty+0x40/0x190 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3354 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x297/0x3c0 fs/namespace.c:3542
 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: 0033:0x7f9fbae18969
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:00007f9fb8c80038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9fbb03ffa0 RCX: 00007f9fbae18969
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 00002000000000c0
RBP: 00007f9fbae9aab1 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000123b058 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9fbb03ffa0 R15: 00007ffc8921a328
 </TASK>