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: 4264 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x22b/0x9c0 fs/jfs/jfs_logmgr.c:937
Code: 81 bc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 73 d7 e3 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 57 d7 e3 fe 49 8b 3f e8 3f 81 bc fe
RSP: 0018:ffffc90003cc7b60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 1f705c576ca48f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003cc7c80 R08: dffffc0000000000 R09: ffffc90003cc7a80
R10: fffff52000798f59 R11: 1ffff92000798f50 R12: ffff8880551e6800
R13: dffffc0000000000 R14: ffff888027c8ac38 R15: 0000000000000030
FS:  0000555566cdf500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f578fb94198 CR3: 000000005cdee000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 jfs_syncpt+0x77/0x90 fs/jfs/jfs_logmgr.c:1041
 jfs_sync_fs+0x83/0xa0 fs/jfs/super.c:685
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:474
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3caf98ff17
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:00007ffc693fda88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3cafa11c05 RCX: 00007f3caf98ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc693fdb40
RBP: 00007ffc693fdb40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc693febd0
R13: 00007f3cafa11c05 R14: 000000000005f833 R15: 00007ffc693fec10
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x22b/0x9c0 fs/jfs/jfs_logmgr.c:937
Code: 81 bc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 73 d7 e3 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 57 d7 e3 fe 49 8b 3f e8 3f 81 bc fe
RSP: 0018:ffffc90003cc7b60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 1f705c576ca48f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003cc7c80 R08: dffffc0000000000 R09: ffffc90003cc7a80
R10: fffff52000798f59 R11: 1ffff92000798f50 R12: ffff8880551e6800
R13: dffffc0000000000 R14: ffff888027c8ac38 R15: 0000000000000030
FS:  0000555566cdf500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000005cdee000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	81 bc fe 4d 8d 7e f0 	cmpl   $0x48f8894c,-0xf8172b3(%rsi,%rdi,8)
   7:	4c 89 f8 48
   b:	c1 e8 03             	shr    $0x3,%eax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 73 d7 e3 fe       	call   0xfee3d78f
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 30          	add    $0x30,%r15
  23:	4c 89 f8             	mov    %r15,%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 ff             	mov    %r15,%rdi
  33:	e8 57 d7 e3 fe       	call   0xfee3d78f
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 3f 81 bc fe       	call   0xfebc817f