syzbot

loop3: detected capacity change from 0 to 1024
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 0 PID: 21878 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 0 PID: 21878 at kernel/locking/mutex.c:582 __mutex_lock+0xa32/0xaf0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 0 PID: 21878 Comm: syz.3.7765 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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 ef a7 e8 03 00 0f 85 df f6 ff ff 48 c7 c7 20 04 8c 8a 48 c7 c6 c0 04 8c 8a e8 1e 5c 16 f7 <0f> 0b e9 c5 f6 ff ff 0f 0b e9 6b f9 ff ff 48 c7 c1 40 41 c0 96 80
RSP: 0018:ffffc90003f17640 EFLAGS: 00010246
RAX: 3a4a0b58e576ca00 RBX: ffff888056151028 RCX: 0000000000080000
RDX: ffffc9000ebc1000 RSI: 0000000000003c8b RDI: 0000000000003c8c
RBP: ffffc90003f177a0 R08: ffff8880b8e279db R09: 1ffff110171c4f3b
R10: dffffc0000000000 R11: ffffed10171c4f3c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880561510b8 R15: 0000000000000000
FS:  00007f55fc5e76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000040 CR3: 0000000079f9a000 CR4: 00000000003506f0
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_slow+0x29d/0x3f0 fs/namei.c:1698
 lookup_slow+0x53/0x70 fs/namei.c:1715
 walk_component+0x2be/0x3f0 fs/namei.c:2006
 lookup_last fs/namei.c:2463 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2487
 filename_lookup+0x224/0x560 fs/namei.c:2516
 user_path_at_empty+0x3e/0x60 fs/namei.c:2913
 user_path_at include/linux/namei.h:57 [inline]
 path_setxattr+0xb3/0x290 fs/xattr.c:631
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:655
 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: 0033:0x7f55fb79ce59
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:00007f55fc5e7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f55fba15fa0 RCX: 00007f55fb79ce59
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000040
RBP: 00007f55fb832d6f R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f55fba16038 R14: 00007f55fba15fa0 R15: 00007ffd67f8f598
 </TASK>