------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 1 PID: 23527 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 1 PID: 23527 at kernel/locking/mutex.c:582 __mutex_lock+0xa32/0xaf0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 1 PID: 23527 Comm: syz.0.8245 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xa32/0xaf0 kernel/locking/mutex.c:747
Code: 04 28 84 c0 0f 85 b7 00 00 00 83 3d 9f 4b e9 03 00 0f 85 df f6 ff ff 48 c7 c7 20 fb 8b 8a 48 c7 c6 c0 fb 8b 8a e8 0e 1d 17 f7 <0f> 0b e9 c5 f6 ff ff 0f 0b e9 6b f9 ff ff 48 c7 c1 40 e1 bf 96 80
RSP: 0018:ffffc9000514f5e0 EFLAGS: 00010246
RAX: 66a662d31b386000 RBX: ffff88802bb64628 RCX: 0000000000080000
RDX: ffffc900053b9000 RSI: 0000000000003abf RDI: 0000000000003ac0
RBP: ffffc9000514f740 R08: ffff8880b8f279db R09: 1ffff110171e4f3b
R10: dffffc0000000000 R11: ffffed10171e4f3c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88802bb646b8 R15: 0000000000000000
FS:  00007f5e69cf66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa09843d000 CR3: 000000005e668000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_lookup+0x18a/0x480 fs/reiserfs/namei.c:364
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfce/0x2ee0 fs/namei.c:3788
 do_filp_open+0x1f1/0x430 fs/namei.c:3818
 do_sys_openat2+0x150/0x4b0 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: 0033:0x7f5e68d9c819
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:00007f5e69cf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5e69015fa0 RCX: 00007f5e68d9c819
RDX: 000000000000275a RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007f5e68e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5e69016038 R14: 00007f5e69015fa0 R15: 00007ffed7f98f08
 </TASK>