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: 4308 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x217/0x9c0 fs/jfs/jfs_logmgr.c:945
Code: df cf fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 9f ef fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 db 9f ef fe 49 8b 3f e8 73 df cf fe
RSP: 0018:ffffc9000348fc00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: cd58cc4daf185b00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000348fd08 R08: dffffc0000000000 R09: ffffc9000348fb40
R10: fffff52000691f70 R11: 1ffff92000691f68 R12: dffffc0000000000
R13: ffff88807bc1a800 R14: ffff888073947638 R15: 0000000000000030
FS:  000055556035c500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555603775c8 CR3: 000000005a22a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_syncpt+0x77/0x90 fs/jfs/jfs_logmgr.c:1049
 jfs_sync_fs+0x83/0xa0 fs/jfs/super.c:690
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x300 fs/super.c:448
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe53dcb4a77
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:00007ffc8cea3918 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe53dd37d7d RCX: 00007fe53dcb4a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc8cea39d0
RBP: 00007ffc8cea39d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc8cea4a60
R13: 00007fe53dd37d7d R14: 000000000001a70d R15: 00007ffc8cea4aa0
 </TASK>
Modules linked in:
---[ end trace 198afd0c4a16c220 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x217/0x9c0 fs/jfs/jfs_logmgr.c:945
Code: df cf fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 9f ef fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 db 9f ef fe 49 8b 3f e8 73 df cf fe
RSP: 0018:ffffc9000348fc00 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: cd58cc4daf185b00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000348fd08 R08: dffffc0000000000 R09: ffffc9000348fb40
R10: fffff52000691f70 R11: 1ffff92000691f68 R12: dffffc0000000000
R13: ffff88807bc1a800 R14: ffff888073947638 R15: 0000000000000030
FS:  000055556035c500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555603775c8 CR3: 000000005a22a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	cf                   	iret
   1:	fe 4d 8d             	decb   -0x73(%rbp)
   4:	7e f0                	jle    0xfffffff6
   6:	4c 89 f8             	mov    %r15,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  11:	74 08                	je     0x1b
  13:	4c 89 ff             	mov    %r15,%rdi
  16:	e8 f7 9f ef fe       	call   0xfeefa012
  1b:	4d 8b 3f             	mov    (%r15),%r15
  1e:	49 83 c7 30          	add    $0x30,%r15
  22:	4c 89 f8             	mov    %r15,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ff             	mov    %r15,%rdi
  32:	e8 db 9f ef fe       	call   0xfeefa012
  37:	49 8b 3f             	mov    (%r15),%rdi
  3a:	e8 73 df cf fe       	call   0xfecfdfb2