loop0: detected capacity change from 0 to 32768
general protection fault, probably for non-canonical address 0xdffffc00000000ba: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000005d0-0x00000000000005d7]
CPU: 0 PID: 4327 Comm: syz.0.18 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:blkg_tryget_closest block/blk-cgroup.c:1831 [inline]
RIP: 0010:bio_associate_blkg_from_css+0x293/0x960 block/blk-cgroup.c:1865
Code: c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 e6 04 c9 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 bf 04 c9 fd bb 90 00 00 00 48 03 5d
RSP: 0018:ffffc9000430f920 EFLAGS: 00010202
RAX: 00000000000000ba RBX: 0000000000000001 RCX: dffffc0000000000
RDX: ffffc900048d9000 RSI: 0000000000005639 RDI: 000000000000563a
RBP: 00000000000005d0 R08: ffffffff84015a4b R09: fffffbfff2131221
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880212ab000
R13: ffff888073cfb640 R14: ffff888073cfb648 R15: ffff888029c2d96c
FS:  00007fed90faa6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020401030 CR3: 000000001bfdf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bio_associate_blkg+0x220/0x330 block/blk-cgroup.c:1893
 lbmStartIO+0x207/0x4b0 fs/jfs/jfs_logmgr.c:2130
 lbmWrite+0x379/0x4a0 fs/jfs/jfs_logmgr.c:2079
 jfs_flush_journal+0x533/0xec0 fs/jfs/jfs_logmgr.c:1556
 jfs_sync_fs+0x7c/0xa0 fs/jfs/super.c:689
 sync_filesystem+0xe8/0x220 fs/sync.c:56
 jfs_remount+0x132/0x6a0 fs/jfs/super.c:437
 reconfigure_super+0x43a/0x870 fs/super.c:938
 do_remount fs/namespace.c:2668 [inline]
 path_mount+0xceb/0x10a0 fs/namespace.c:3334
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fed9313b4ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007fed90fa9e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fed90fa9ef0 RCX: 00007fed9313b4ca
RDX: 0000000020000f40 RSI: 0000000020000f00 RDI: 0000000000000000
RBP: 0000000020000f40 R08: 00007fed90fa9ef0 R09: 0000000001a4a438
R10: 0000000001a4a438 R11: 0000000000000246 R12: 0000000020000f00
R13: 00007fed90fa9eb0 R14: 0000000000000000 R15: 0000000020000080
 </TASK>
Modules linked in:
---[ end trace 736585381bf71f65 ]---
RIP: 0010:blkg_tryget_closest block/blk-cgroup.c:1831 [inline]
RIP: 0010:bio_associate_blkg_from_css+0x293/0x960 block/blk-cgroup.c:1865
Code: c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 e6 04 c9 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 bf 04 c9 fd bb 90 00 00 00 48 03 5d
RSP: 0018:ffffc9000430f920 EFLAGS: 00010202
RAX: 00000000000000ba RBX: 0000000000000001 RCX: dffffc0000000000
RDX: ffffc900048d9000 RSI: 0000000000005639 RDI: 000000000000563a
RBP: 00000000000005d0 R08: ffffffff84015a4b R09: fffffbfff2131221
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880212ab000
R13: ffff888073cfb640 R14: ffff888073cfb648 R15: ffff888029c2d96c
FS:  00007fed90faa6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000001bfdf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   7:	74 08                	je     0x11
   9:	4c 89 f7             	mov    %r14,%rdi
   c:	e8 e6 04 c9 fd       	call   0xfdc904f7
  11:	bd d0 05 00 00       	mov    $0x5d0,%ebp
  16:	49 03 2e             	add    (%r14),%rbp
  19:	48 89 e8             	mov    %rbp,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 ef             	mov    %rbp,%rdi
  33:	e8 bf 04 c9 fd       	call   0xfdc904f7
  38:	bb 90 00 00 00       	mov    $0x90,%ebx
  3d:	48                   	rex.W
  3e:	03                   	.byte 0x3
  3f:	5d                   	pop    %rbp