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: 5954 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:write_special_inodes+0xa9/0x180 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 bb 4a ee 07 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b6 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 93 00 00 00 49 8b 7d 30 2e e8 83 4a ee 07 48 8d
RSP: 0018:ffffc90003147bc8 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff88804f43b400 RCX: ffffffff8241538d
RDX: ffff88802f09bd00 RSI: ffffffff82415304 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82415550
R13: 0000000000000000 R14: ffff888029748000 R15: ffff88805dc29c40
FS:  0000555583fab500(0000) GS:ffff888124345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f211744f000 CR3: 000000006df65000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lmLogSync+0x491/0x7b0 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 fs/sync.c:56 [inline]
 sync_filesystem+0x111/0x290 fs/sync.c:30
 generic_shutdown_super+0x86/0x360 fs/super.c:625
 kill_block_super+0x3b/0xa0 fs/super.c:1725
 deactivate_locked_super+0xc1/0x1b0 fs/super.c:476
 deactivate_super fs/super.c:509 [inline]
 deactivate_super+0xe7/0x110 fs/super.c:505
 cleanup_mnt+0x21f/0x450 fs/namespace.c:1312
 task_work_run+0x150/0x240 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:67 [inline]
 exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91b779d9d7
Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd9bfe83c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f91b7832050 RCX: 00007f91b779d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd9bfe8480
RBP: 00007ffd9bfe8480 R08: 00007ffd9bfe9480 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd9bfe9510
R13: 00007f91b7832050 R14: 000000000001e2a5 R15: 00007ffd9bfe9550
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes+0xa9/0x180 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 bb 4a ee 07 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b6 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 93 00 00 00 49 8b 7d 30 2e e8 83 4a ee 07 48 8d
RSP: 0018:ffffc90003147bc8 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff88804f43b400 RCX: ffffffff8241538d
RDX: ffff88802f09bd00 RSI: ffffffff82415304 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82415550
R13: 0000000000000000 R14: ffff888029748000 R15: ffff88805dc29c40
FS:  0000555583fab500(0000) GS:ffff888124345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe1be28c18 CR3: 000000006df65000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	2e e8 bb 4a ee 07    	cs call 0x7ee4ac1
   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 b6 00 00 00    	jne    0xd1
  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 93 00 00 00    	jne    0xc7
  34:	49 8b 7d 30          	mov    0x30(%r13),%rdi
  38:	2e e8 83 4a ee 07    	cs call 0x7ee4ac1
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d