ERROR: (device loop3): txBegin: read-only filesystem
ERROR: (device loop3): remounting filesystem as read-only
read_mapping_page failed!
jfs_create: dtInsert returned -EIO
ERROR: (device (efault)): jfs_create: 
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 1 UID: 0 PID: 7788 Comm: syz.3.303 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:sb_rdonly include/linux/fs/super.h:187 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x13b/0x2c0 fs/jfs/super.c:98
Code: 8d b7 c8 07 00 00 48 8b 55 08 48 8d 4c 24 60 48 c7 c7 a0 4f 8a 8b 48 89 34 24 e8 50 79 fe ff 4d 8d 67 50 4d 89 e6 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 e7 e8 a6 bf 01 01 4c 89 64 24 08 4d 8b
RSP: 0018:ffffc90006087580 EFLAGS: 00010206
RAX: 0000000000000027 RBX: 1ffff92000c10eb8 RCX: 07e007f92fdf9c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90006087690 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101712491b R12: 0000000000000050
R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000
FS:  00007f4c61f7d6c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeb7927b40 CR3: 00000000340b4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_create+0x7c5/0xb10 fs/jfs/namei.c:141
 lookup_open fs/namei.c:4489 [inline]
 open_last_lookups fs/namei.c:4589 [inline]
 path_openat+0x13b4/0x38a0 fs/namei.c:4833
 do_file_open+0x23e/0x4a0 fs/namei.c:4865
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_creat fs/open.c:1450 [inline]
 __se_sys_creat fs/open.c:1444 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1444
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c63d4c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4c61f7d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f4c63fc6090 RCX: 00007f4c63d4c819
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000200000001f80
RBP: 00007f4c63de2c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c63fc6128 R14: 00007f4c63fc6090 R15: 00007ffc345410e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sb_rdonly include/linux/fs/super.h:187 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x13b/0x2c0 fs/jfs/super.c:98
Code: 8d b7 c8 07 00 00 48 8b 55 08 48 8d 4c 24 60 48 c7 c7 a0 4f 8a 8b 48 89 34 24 e8 50 79 fe ff 4d 8d 67 50 4d 89 e6 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 e7 e8 a6 bf 01 01 4c 89 64 24 08 4d 8b
RSP: 0018:ffffc90006087580 EFLAGS: 00010206
RAX: 0000000000000027 RBX: 1ffff92000c10eb8 RCX: 07e007f92fdf9c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90006087690 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101712491b R12: 0000000000000050
R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000
FS:  00007f4c61f7d6c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd68a5dd000 CR3: 00000000340b4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	8d b7 c8 07 00 00    	lea    0x7c8(%rdi),%esi
   6:	48 8b 55 08          	mov    0x8(%rbp),%rdx
   a:	48 8d 4c 24 60       	lea    0x60(%rsp),%rcx
   f:	48 c7 c7 a0 4f 8a 8b 	mov    $0xffffffff8b8a4fa0,%rdi
  16:	48 89 34 24          	mov    %rsi,(%rsp)
  1a:	e8 50 79 fe ff       	call   0xfffe796f
  1f:	4d 8d 67 50          	lea    0x50(%r15),%r12
  23:	4d 89 e6             	mov    %r12,%r14
  26:	49 c1 ee 03          	shr    $0x3,%r14
* 2a:	43 80 3c 2e 00       	cmpb   $0x0,(%r14,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 a6 bf 01 01       	call   0x101bfdf
  39:	4c 89 64 24 08       	mov    %r12,0x8(%rsp)
  3e:	4d                   	rex.WRB
  3f:	8b                   	.byte 0x8b