loop0: detected capacity change from 0 to 32768
loop0: detected capacity change from 32768 to 32767
ERROR: (device loop0): txBegin: read-only filesystem
ERROR: (device loop0): remounting filesystem as read-only
ERROR: (device loop0): dbFindCtl: Corrupt dmapctl page
jfs_create: dtInsert returned -EIO
ERROR: (device (efault)): jfs_create: 
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:sb_rdonly include/linux/fs.h:2365 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x159/0x2e0 fs/jfs/super.c:98
Code: 08 48 c7 c7 00 b7 62 8c 48 89 74 24 08 4c 89 f9 e8 ec 77 d3 fd 4d 8d 65 50 4d 89 e7 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 07 00 74 08 4c 89 e7 e8 b8 6b d5 fe 49 8b 1c 24 48 89 de
RSP: 0018:ffffc9000d3575c0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 177ea75081ea0100
RDX: ffffc9000eae2000 RSI: 0000000000003e7e RDI: 0000000000003e7f
RBP: ffffc9000d3576d0 R08: ffffffff81a1152c R09: fffffbfff1d3a614
R10: dffffc0000000000 R11: fffffbfff1d3a614 R12: 0000000000000050
R13: 0000000000000000 R14: 1ffff92001a6aec0 R15: 000000000000000a
FS:  00007f03055726c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02f95ff000 CR3: 0000000040e28000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_create+0x81d/0xbb0 fs/jfs/namei.c:140
 lookup_open fs/namei.c:3651 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x193c/0x3590 fs/namei.c:3986
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_creat fs/open.c:1521 [inline]
 __se_sys_creat fs/open.c:1515 [inline]
 __x64_sys_creat+0x123/0x170 fs/open.c:1515
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f030478d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0305572038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f03049a5fa0 RCX: 00007f030478d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000000e00
RBP: 00007f030480e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f03049a5fa0 R15: 00007fff9ce73568
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sb_rdonly include/linux/fs.h:2365 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x159/0x2e0 fs/jfs/super.c:98
Code: 08 48 c7 c7 00 b7 62 8c 48 89 74 24 08 4c 89 f9 e8 ec 77 d3 fd 4d 8d 65 50 4d 89 e7 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 07 00 74 08 4c 89 e7 e8 b8 6b d5 fe 49 8b 1c 24 48 89 de
RSP: 0018:ffffc9000d3575c0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 177ea75081ea0100
RDX: ffffc9000eae2000 RSI: 0000000000003e7e RDI: 0000000000003e7f
RBP: ffffc9000d3576d0 R08: ffffffff81a1152c R09: fffffbfff1d3a614
R10: dffffc0000000000 R11: fffffbfff1d3a614 R12: 0000000000000050
R13: 0000000000000000 R14: 1ffff92001a6aec0 R15: 000000000000000a
FS:  00007f03055726c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0305550fe0 CR3: 0000000040e28000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 48 c7             	or     %cl,-0x39(%rax)
   3:	c7 00 b7 62 8c 48    	movl   $0x488c62b7,(%rax)
   9:	89 74 24 08          	mov    %esi,0x8(%rsp)
   d:	4c 89 f9             	mov    %r15,%rcx
  10:	e8 ec 77 d3 fd       	call   0xfdd37801
  15:	4d 8d 65 50          	lea    0x50(%r13),%r12
  19:	4d 89 e7             	mov    %r12,%r15
  1c:	49 c1 ef 03          	shr    $0x3,%r15
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	41 80 3c 07 00       	cmpb   $0x0,(%r15,%rax,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 b8 6b d5 fe       	call   0xfed56bf1
  39:	49 8b 1c 24          	mov    (%r12),%rbx
  3d:	48 89 de             	mov    %rbx,%rsi