loop1: detected capacity change from 0 to 32768
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: 13114 Comm: syz.1.778 Tainted: G        W           6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:lmLogSync+0x1f1/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 80 87 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 1d b3 e6 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 01 b3 e6 fe 49 8b 3f e8 19 fa bd fe
RSP: 0018:ffffc9000553fae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900135bb000 RSI: 0000000000000831 RDI: 0000000000000832
RBP: ffffc9000553fc00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000553f8c8 R11: fffff52000aa7f46 R12: 0000000000000000
R13: ffff888039249800 R14: ffff888027d60038 R15: 0000000000000030
FS:  00007fdc6ec9e6c0(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f23b9f000 CR3: 000000005c922000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 jfs_sync_fs+0x87/0xa0 fs/jfs/super.c:650
 sync_filesystem+0xea/0x250 fs/sync.c:56
 jfs_reconfigure+0xc6/0xa00 fs/jfs/super.c:370
 reconfigure_super+0x224/0x890 fs/super.c:1077
 do_remount fs/namespace.c:3314 [inline]
 path_mount+0xd18/0xfe0 fs/namespace.c:4112
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc70a4038a
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:00007fdc6ec9de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fdc6ec9def0 RCX: 00007fdc70a4038a
RDX: 00002000000003c0 RSI: 0000200000000340 RDI: 0000000000000000
RBP: 00002000000003c0 R08: 00007fdc6ec9def0 R09: 000000000126a4b5
R10: 000000000126a4b5 R11: 0000000000000246 R12: 0000200000000340
R13: 00007fdc6ec9deb0 R14: 0000000000000000 R15: 0000200000004140
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:lmLogSync+0x1f1/0x9d0 fs/jfs/jfs_logmgr.c:937
Code: 80 87 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 1d b3 e6 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 01 b3 e6 fe 49 8b 3f e8 19 fa bd fe
RSP: 0018:ffffc9000553fae0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900135bb000 RSI: 0000000000000831 RDI: 0000000000000832
RBP: ffffc9000553fc00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000553f8c8 R11: fffff52000aa7f46 R12: 0000000000000000
R13: ffff888039249800 R14: ffff888027d60038 R15: 0000000000000030
FS:  00007fdc6ec9e6c0(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f23b9f000 CR3: 000000005c922000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	80 87 fe 4d 8d 7e d8 	addb   $0xd8,0x7e8d4dfe(%rdi)
   7:	4c 89 f8             	mov    %r15,%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 ff             	mov    %r15,%rdi
  17:	e8 1d b3 e6 fe       	call   0xfee6b339
  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 01 b3 e6 fe       	call   0xfee6b339
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 19 fa bd fe       	call   0xfebdfa59