WARNING: CPU: 3 PID: 19885 at lib/kobject.c:750 kobject_put+0x22b/0x540 lib/kobject.c:750
Modules linked in:
CPU: 3 PID: 19885 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:kobject_put+0x22b/0x540 lib/kobject.c:750
Code: e8 4a bc 77 fd 48 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 94 02 00 00 48 8b 75 00 48 89 ea 48 c7 c7 c0 08 09 8a e8 8f 2f 06 05 <0f> 0b e9 32 fe ff ff e8 19 bc 77 fd 4d 89 f9 48 89 e9 4c 89 f2 49
RSP: 0018:ffffc90022eefc28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815f1498 RDI: fffff520045ddf77
RBP: ffff8880249ca990 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815eb1fe R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880249ca9cc R14: ffff888042bc04f8 R15: ffff8880504d6068
FS:  0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:00000000f58f5b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f58f6000 CR3: 0000000071855000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 erofs_unregister_sysfs+0x46/0x60 fs/erofs/sysfs.c:225
 erofs_put_super+0x37/0xb0 fs/erofs/super.c:771
 generic_shutdown_super+0x14c/0x400 fs/super.c:465
 kill_block_super+0x97/0xf0 fs/super.c:1397
 erofs_kill_sb+0x60/0x190 fs/erofs/super.c:752
 deactivate_locked_super+0x94/0x160 fs/super.c:335
 get_tree_bdev+0x573/0x760 fs/super.c:1297
 vfs_get_tree+0x89/0x2f0 fs/super.c:1500
 do_new_mount fs/namespace.c:2994 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3324
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount fs/namespace.c:3522 [inline]
 __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3522
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6efb549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f58f5410 EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f58f5480 RCX: 0000000020000100
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 00000000f58f54c0
RBP: 00000000f58f54c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	03 74 c0 01          	add    0x1(%rax,%rax,8),%esi
   4:	10 05 03 74 b8 01    	adc    %al,0x1b87403(%rip)        # 0x1b8740d
   a:	10 06                	adc    %al,(%rsi)
   c:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
  10:	10 07                	adc    %al,(%rdi)
  12:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
  16:	10 08                	adc    %cl,(%rax)
  18:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1c:	00 00                	add    %al,(%rax)
  1e:	00 00                	add    %al,(%rax)
  20:	00 51 52             	add    %dl,0x52(%rcx)
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	retq
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  39:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi