syzbot

general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 5007 Comm: syz-executor184 Not tainted 6.4.0-rc3-syzkaller-00278-g49572d536129 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x815/0xec0 fs/jfs/jfs_logmgr.c:1573
Code: b0 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d9 ad d8 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 bc ad d8 fe 48 8b 3b e8 74 42 b0
RSP: 0018:ffffc90003aefae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: 30eb283e5c676200
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003aefc20 R08: ffffffff81bae30a R09: 0000000000000000
R10: ffffc90003aefa30 R11: dffffc0000000001 R12: 1ffff9200075df68
R13: dffffc0000000000 R14: ffff88807e435000 R15: ffff8880770f3a38
FS:  00005555560dc300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555560e5628 CR3: 0000000072c49000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_umount+0x170/0x3a0 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x134/0x340 fs/super.c:500
 kill_block_super+0x84/0xf0 fs/super.c:1407
 deactivate_locked_super+0xa4/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f961fc6dea7
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8a12c058 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f961fc6dea7
RDX: 00007ffe8a12c11a RSI: 000000000000000a RDI: 00007ffe8a12c110
RBP: 00007ffe8a12c110 R08: 00000000ffffffff R09: 00007ffe8a12bef0
R10: 00005555560dd653 R11: 0000000000000202 R12: 00007ffe8a12d180
R13: 00005555560dd5f0 R14: 00007ffe8a12c080 R15: 000000000000003a
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x815/0xec0 fs/jfs/jfs_logmgr.c:1573
Code: b0 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d9 ad d8 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 bc ad d8 fe 48 8b 3b e8 74 42 b0
RSP: 0018:ffffc90003aefae0 EFLAGS: 00010206

RAX: 0000000000000006 RBX: 0000000000000030 RCX: 30eb283e5c676200
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003aefc20 R08: ffffffff81bae30a R09: 0000000000000000
R10: ffffc90003aefa30 R11: dffffc0000000001 R12: 1ffff9200075df68
R13: dffffc0000000000 R14: ffff88807e435000 R15: ffff8880770f3a38
FS:  00005555560dc300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9617efd000 CR3: 0000000072c49000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b0 fe                	mov    $0xfe,%al
   2:	49 8d 5f f0          	lea    -0x10(%r15),%rbx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  12:	74 08                	je     0x1c
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 d9 ad d8 fe       	callq  0xfed8adf5
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 30          	add    $0x30,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 bc ad d8 fe       	callq  0xfed8adf5
  39:	48 8b 3b             	mov    (%rbx),%rdi
  3c:	e8                   	.byte 0xe8
  3d:	74 42                	je     0x81
  3f:	b0                   	.byte 0xb0