Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 UID: 0 PID: 5823 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x7f8/0xed0 fs/jfs/jfs_logmgr.c:1572
Code: 3b ad fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 66 ad db fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 4a ad db fe 49 8b 3c 24 e8 01 3b ad
RSP: 0018:ffffc900040cfae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802f429e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040cfc10 R08: ffffc900040cfa2f R09: 0000000000000000
R10: ffffc900040cf8c8 R11: fffff52000819f46 R12: 0000000000000030
R13: ffff88807d73f1a8 R14: ffff88805aff2c28 R15: ffff88805aff2c38
FS:  000055557e8a9500(0000) GS:ffff888125fc2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000019e000 CR3: 0000000075b26000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x135/0x2c0 fs/super.c:643
 kill_block_super+0x44/0x90 fs/super.c:1723
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1317
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2e9/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd6e95909f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffdaa1ee568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd6e9611d7d RCX: 00007fd6e95909f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdaa1ee620
RBP: 00007ffdaa1ee620 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdaa1ef6b0
R13: 00007fd6e9611d7d R14: 00000000000c5386 R15: 00007ffdaa1ef6f0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:jfs_flush_journal+0x7f8/0xed0 fs/jfs/jfs_logmgr.c:1572
Code: 3b ad fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 66 ad db fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 4a ad db fe 49 8b 3c 24 e8 01 3b ad
RSP: 0018:ffffc900040cfae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802f429e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040cfc10 R08: ffffc900040cfa2f R09: 0000000000000000
R10: ffffc900040cf8c8 R11: fffff52000819f46 R12: 0000000000000030
R13: ffff88807d73f1a8 R14: ffff88805aff2c28 R15: ffff88805aff2c38
FS:  000055557e8a9500(0000) GS:ffff888125ec2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe887da2000 CR3: 0000000075b26000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	3b ad fe 4d 8d 77    	cmp    0x778d4dfe(%rbp),%ebp
   6:	f0 4c 89 f0          	lock mov %r14,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 66 ad db fe       	call   0xfedbad82
  1c:	4d 8b 26             	mov    (%r14),%r12
  1f:	49 83 c4 30          	add    $0x30,%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 e7             	mov    %r12,%rdi
  33:	e8 4a ad db fe       	call   0xfedbad82
  38:	49 8b 3c 24          	mov    (%r12),%rdi
  3c:	e8                   	.byte 0xe8
  3d:	01 3b                	add    %edi,(%rbx)
  3f:	ad                   	lods   %ds:(%rsi),%eax