gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88804e8821f8, owner = 0x0, curr 0xffff888020778000, list empty
WARNING: kernel/locking/rwsem.c:1380 at __up_write kernel/locking/rwsem.c:1380 [inline], CPU#0: syz.7.1667/12157
WARNING: kernel/locking/rwsem.c:1380 at up_write+0x1bf/0x4f0 kernel/locking/rwsem.c:1643, CPU#0: syz.7.1667/12157
Modules linked in:
CPU: 0 UID: 0 PID: 12157 Comm: syz.7.1667 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__up_write kernel/locking/rwsem.c:1380 [inline]
RIP: 0010:up_write+0x1d1/0x4f0 kernel/locking/rwsem.c:1643
Code: 48 c1 ea 03 80 3c 02 00 0f 85 2e 03 00 00 48 8b 13 48 8d 3d 51 f6 f8 0e 41 56 4d 89 e9 4d 89 f8 4c 89 e1 48 c7 c6 c0 bf af 8b <67> 48 0f b9 3a e8 55 93 0d 03 59 bf 01 00 00 00 e8 ca 90 f1 ff 48
RSP: 0018:ffffc900046b7c80 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88804e8821f8 RCX: ffff88804e8821f8
RDX: 0000000000000000 RSI: ffffffff8bafbfc0 RDI: ffffffff90dd1550
RBP: ffff88804e882200 R08: 0000000000000000 R09: ffff888020778000
R10: ffff88804e8821ff R11: 0000000000000000 R12: ffff88804e8821f8
R13: ffff888020778000 R14: ffffffff8bafbda0 R15: 0000000000000000
FS:  00007f44c45f66c0(0000) GS:ffff888124343000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f865393e4e8 CR3: 000000002a516000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:1038 [inline]
 chown_common+0x3fd/0x6e0 fs/open.c:780
 do_fchownat+0x18e/0x1f0 fs/open.c:806
 __do_sys_fchownat fs/open.c:821 [inline]
 __se_sys_fchownat fs/open.c:818 [inline]
 __x64_sys_fchownat+0xbd/0x160 fs/open.c:818
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f44c639c799
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:00007f44c45f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f44c6616090 RCX: 00007f44c639c799
RDX: 000000000000ee01 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f44c6432c99 R08: 0000000000001000 R09: 0000000000000000
R10: 000000000000ee00 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44c6616128 R14: 00007f44c6616090 R15: 00007ffdb43bcc48
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 2e 03 00 00    	jne    0x33c
   e:	48 8b 13             	mov    (%rbx),%rdx
  11:	48 8d 3d 51 f6 f8 0e 	lea    0xef8f651(%rip),%rdi        # 0xef8f669
  18:	41 56                	push   %r14
  1a:	4d 89 e9             	mov    %r13,%r9
  1d:	4d 89 f8             	mov    %r15,%r8
  20:	4c 89 e1             	mov    %r12,%rcx
  23:	48 c7 c6 c0 bf af 8b 	mov    $0xffffffff8bafbfc0,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e8 55 93 0d 03       	call   0x30d9389
  34:	59                   	pop    %rcx
  35:	bf 01 00 00 00       	mov    $0x1,%edi
  3a:	e8 ca 90 f1 ff       	call   0xfff19109
  3f:	48                   	rex.W