loop2: detected capacity change from 0 to 64
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 1 PID: 24130 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 1 PID: 24130 at kernel/locking/mutex.c:582 __mutex_lock+0xa24/0xaf0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 1 PID: 24130 Comm: syz.2.17607 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xa24/0xaf0 kernel/locking/mutex.c:747
Code: 04 28 84 c0 0f 85 b7 00 00 00 83 3d 6d 5b 00 04 00 0f 85 e0 f6 ff ff 48 c7 c7 e0 ee 8b 8a 48 c7 c6 80 ef 8b 8a e8 0c c4 2d f7 <0f> 0b e9 c6 f6 ff ff 0f 0b e9 6c f9 ff ff 48 c7 c1 20 41 be 96 80
RSP: 0018:ffffc90003a07680 EFLAGS: 00010246
RAX: 922dec14c0f34800 RBX: ffff888030527828 RCX: 0000000000080000
RDX: ffffc9000ddb3000 RSI: 00000000000034dd RDI: 00000000000034de
RBP: ffffc90003a077e0 R08: dffffc0000000000 R09: ffffed10171e4f34
R10: ffffed10171e4f34 R11: 1ffff110171e4f33 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880305278b8 R15: 0000000000000000
FS:  00007f3f653706c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555564140808 CR3: 000000007372e000 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+0x137/0x420 fs/reiserfs/namei.c:364
 __lookup_slow+0x27d/0x3a0 fs/namei.c:1690
 lookup_slow+0x53/0x70 fs/namei.c:1707
 walk_component+0x2be/0x3f0 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2479
 filename_lookup+0x1f0/0x500 fs/namei.c:2508
 user_path_at_empty+0x3e/0x60 fs/namei.c:2905
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3403 [inline]
 __do_sys_mount fs/namespace.c:3614 [inline]
 __se_sys_mount+0x297/0x3c0 fs/namespace.c:3591
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3f6458e9a9
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:00007f3f65370038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3f647b5fa0 RCX: 00007f3f6458e9a9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000500
RBP: 00007f3f64610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000020100a R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3f647b5fa0 R15: 00007fff6eaf4178
 </TASK>