general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 5997 Comm: syz.1.23 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:207 [inline]
RIP: 0010:jfs_flush_journal+0x7ae/0xeb0 fs/jfs/jfs_logmgr.c:1573
Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 f0 4c dc fe 4d 8b 26 49 83 c4 40 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 d4 4c dc fe 49 8b 3c 24 e8 eb 4c b2
RSP: 0018:ffffc9000534f740 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888023213c00 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc9000534f870 R08: ffffffff90da960f R09: 1ffffffff21b52c1
R10: dffffc0000000000 R11: fffffbfff21b52c2 R12: 0000000000000040
R13: ffff8880593031a8 R14: ffff888078a7c810 R15: ffff888078a7c838
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8943156c0 CR3: 00000000623c8000 CR4: 00000000003506f0
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+0x134/0x2b0 fs/super.c:693
 kill_block_super+0x44/0x90 fs/super.c:1660
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x90b/0x23c0 kernel/exit.c:883
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 get_signal+0x12fc/0x1400 kernel/signal.c:2902
 arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff13958f749
Code: Unable to access opcode bytes at 0x7ff13958f71f.
RSP: 002b:00007ff13a48d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff1397e6188 RCX: 00007ff13958f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff1397e6188
RBP: 00007ff1397e6180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff1397e6218 R14: 00007ffe1c9d7b40 R15: 00007ffe1c9d7c28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x7ae/0xeb0 fs/jfs/jfs_logmgr.c:1573
Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 f0 4c dc fe 4d 8b 26 49 83 c4 40 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 d4 4c dc fe 49 8b 3c 24 e8 eb 4c b2
RSP: 0018:ffffc9000534f740 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888023213c00 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc9000534f870 R08: ffffffff90da960f R09: 1ffffffff21b52c1
R10: dffffc0000000000 R11: fffffbfff21b52c2 R12: 0000000000000040
R13: ffff8880593031a8 R14: ffff888078a7c810 R15: ffff888078a7c838
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8943156c0 CR3: 00000000623c8000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 4d 8d             	add    %cl,-0x73(%rbp)
   5:	77 d8                	ja     0xffffffdf
   7:	4c 89 f0             	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 f0 4c dc fe       	call   0xfedc4d0c
  1c:	4d 8b 26             	mov    (%r14),%r12
  1f:	49 83 c4 40          	add    $0x40,%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 d4 4c dc fe       	call   0xfedc4d0c
  38:	49 8b 3c 24          	mov    (%r12),%rdi
  3c:	e8                   	.byte 0xe8
  3d:	eb 4c                	jmp    0x8b
  3f:	b2                   	.byte 0xb2