loop1: detected capacity change from 0 to 32768
read_mapping_page failed!
diRead: diIAGRead returned -5
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 29541 Comm: syz.1.5307 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x94b/0xed0 fs/jfs/jfs_logmgr.c:1581
Code: 73 7a fe 4d 8d 75 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 13 b4 df fe 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f7 b3 df fe 49 8b 3e e8 2f ad b1 fe
RSP: 0018:ffffc900112d7980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001d1a9000 RSI: 000000000000a54c RDI: 000000000000a54d
RBP: ffffc900112d7ac0 R08: ffffc900112d78cf R09: 0000000000000000
R10: ffffc900112d7768 R11: fffff5200225af1a R12: 0000000000000000
R13: ffff88802c5c8438 R14: 0000000000000030 R15: ffff888024705228
FS:  00007f4fc2ff16c0(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000065c6a000 CR4: 00000000003526f0
DR0: 000000000000004b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58
 jfs_fill_super+0x9c5/0xd80 fs/jfs/super.c:567
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691
 vfs_get_tree+0x92/0x2b0 fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount+0x302/0x9e0 fs/namespace.c:3725
 do_mount fs/namespace.c:4048 [inline]
 __do_sys_mount fs/namespace.c:4236 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4213
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4fc219066a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4fc2ff0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4fc2ff0ef0 RCX: 00007f4fc219066a
RDX: 00002000000001c0 RSI: 0000200000000180 RDI: 00007f4fc2ff0eb0
RBP: 00002000000001c0 R08: 00007f4fc2ff0ef0 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000246 R12: 0000200000000180
R13: 00007f4fc2ff0eb0 R14: 000000000000614f R15: 0000200000000200
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:jfs_flush_journal+0x94b/0xed0 fs/jfs/jfs_logmgr.c:1581
Code: 73 7a fe 4d 8d 75 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 13 b4 df fe 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 f7 b3 df fe 49 8b 3e e8 2f ad b1 fe
RSP: 0018:ffffc900112d7980 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001d1a9000 RSI: 000000000000a54c RDI: 000000000000a54d
RBP: ffffc900112d7ac0 R08: ffffc900112d78cf R09: 0000000000000000
R10: ffffc900112d7768 R11: fffff5200225af1a R12: 0000000000000000
R13: ffff88802c5c8438 R14: 0000000000000030 R15: ffff888024705228
FS:  00007f4fc2ff16c0(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000065c6a000 CR4: 00000000003526f0
DR0: 000000000000004b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	73 7a                	jae    0x7c
   2:	fe 4d 8d             	decb   -0x73(%rbp)
   5:	75 d8                	jne    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 13 b4 df fe       	call   0xfedfb42f
  1c:	4d 8b 36             	mov    (%r14),%r14
  1f:	49 83 c6 30          	add    $0x30,%r14
  23:	4c 89 f0             	mov    %r14,%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 f7             	mov    %r14,%rdi
  33:	e8 f7 b3 df fe       	call   0xfedfb42f
  38:	49 8b 3e             	mov    (%r14),%rdi
  3b:	e8 2f ad b1 fe       	call   0xfeb1ad6f