Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 5833 Comm: syz-executor Not tainted 6.15.0-syzkaller-02443-g015a99fa7665 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:write_special_inodes+0xa9/0x170 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 5b c7 2f 08 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b1 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 8e 00 00 00 49 8b 7d 30 2e e8 23 c7 2f 08 48 8d
RSP: 0018:ffffc9000403fc08 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff888027898600 RCX: ffffffff81f190ee
RDX: 0000000000000000 RSI: ffffffff81f190a1 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff81f258e0
R13: 0000000000000000 R14: ffff888055afa000 R15: ffff88805b549c40
FS:  00005555704d3500(0000) GS:ffff8881249aa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f344516a000 CR3: 000000005ea50000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lmLogSync+0x49e/0x820 fs/jfs/jfs_logmgr.c:937
 jfs_syncpt+0x89/0xa0 fs/jfs/jfs_logmgr.c:1041
 jfs_sync_fs+0x83/0xb0 fs/jfs/super.c:650
 sync_filesystem+0x111/0x290 fs/sync.c:56
 generic_shutdown_super+0x74/0x390 fs/super.c:622
 kill_block_super+0x3b/0x90 fs/super.c:1760
 deactivate_locked_super+0xc1/0x1a0 fs/super.c:474
 deactivate_super fs/super.c:507 [inline]
 deactivate_super+0xde/0x100 fs/super.c:503
 cleanup_mnt+0x225/0x450 fs/namespace.c:1432
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f433ff8fc97
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:00007fff06537b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f434001089d RCX: 00007f433ff8fc97
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff06537bd0
RBP: 00007fff06537bd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff06538c60
R13: 00007f434001089d R14: 0000000000041c06 R15: 00007fff06538ca0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes+0xa9/0x170 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 5b c7 2f 08 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b1 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 8e 00 00 00 49 8b 7d 30 2e e8 23 c7 2f 08 48 8d
RSP: 0018:ffffc9000403fc08 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff888027898600 RCX: ffffffff81f190ee
RDX: 0000000000000000 RSI: ffffffff81f190a1 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff81f258e0
R13: 0000000000000000 R14: ffff888055afa000 R15: ffff88805b549c40
FS:  00005555704d3500(0000) GS:ffff888124aaa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffcc796878 CR3: 000000005ea50000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	2e e8 5b c7 2f 08    	cs call 0x82fc761
   6:	48 8d 7b 28          	lea    0x28(%rbx),%rdi
   a:	48 89 f8             	mov    %rdi,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  15:	0f 85 b1 00 00 00    	jne    0xcc
  1b:	4c 8b 6b 28          	mov    0x28(%rbx),%r13
  1f:	49 8d 7d 30          	lea    0x30(%r13),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	0f 85 8e 00 00 00    	jne    0xc2
  34:	49 8b 7d 30          	mov    0x30(%r13),%rdi
  38:	2e e8 23 c7 2f 08    	cs call 0x82fc761
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d