loop1: detected capacity change from 0 to 64
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 0 PID: 2886 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 0 PID: 2886 at kernel/locking/mutex.c:582 __mutex_lock+0xb8c/0xcc0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 0 PID: 2886 Comm: syz.1.12873 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xb8c/0xcc0 kernel/locking/mutex.c:747
Code: 04 08 84 c0 0f 85 20 01 00 00 83 3d dd 49 d3 03 00 0f 85 81 f5 ff ff 48 c7 c7 80 a7 aa 8a 48 c7 c6 20 a8 aa 8a e8 94 94 d8 f6 <0f> 0b e9 67 f5 ff ff 0f 0b e9 47 f9 ff ff 0f 0b e9 ff f5 ff ff 48
RSP: 0018:ffffc9000b63f9a0 EFLAGS: 00010246
RAX: c39a0b9d4aeeba00 RBX: ffff888024349828 RCX: 0000000000080000
RDX: ffffc9000d33b000 RSI: 0000000000003f47 RDI: 0000000000003f48
RBP: ffffc9000b63fb00 R08: ffff8880b8e28c13 R09: 1ffff110171c5182
R10: dffffc0000000000 R11: ffffed10171c5183 R12: 0000000000000000
R13: 1ffff920016c7f44 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fd1779796c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ec20ff8 CR3: 000000001ef93000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 reiserfs_write_lock+0x79/0xd0 fs/reiserfs/lock.c:27
 reiserfs_lookup+0x151/0x520 fs/reiserfs/namei.c:364
 lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1617
 filename_create+0x222/0x460 fs/namei.c:3891
 do_mkdirat+0xa1/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4159 [inline]
 __se_sys_mkdirat fs/namei.c:4157 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
 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: 0033:0x7fd176b8de97
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007fd177978e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd177978ef0 RCX: 00007fd176b8de97
RDX: 00000000000001ff RSI: 0000200000000240 RDI: 00000000ffffff9c
RBP: 0000200000000140 R08: 0000200000000140 R09: 0000000000000000
R10: 0000200000000140 R11: 0000000000000246 R12: 0000200000000240
R13: 00007fd177978eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>