[syzbot] [jfs?] general protection fault in jfs_error (2)

[syzbot <syzbot+5f0d7af0e45fae10edd1@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    2d5404caa8c7 Linux 6.12-rc7
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1772fe30580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d2aeec8c0b2e420c
dashboard link: https://syzkaller.appspot.com/bug?extid=5f0d7af0e45fae10edd1
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17b2f4e8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=119f7ea7980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-2d5404ca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c68277f7b0f1/vmlinux-2d5404ca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/161b075483b1/bzImage-2d5404ca.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/6b6a26f0435b/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5f0d7af0e45fae10edd1@syzkaller.appspotmail.com

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: 5313 Comm: syz-executor116 Not tainted 6.12.0-rc7-syzkaller #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:2292 [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 40 e9 42 8c 48 89 74 24 08 4c 89 f9 e8 4c 22 9c 08 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 48 5e d6 fe 49 8b 1c 24 48 89 de
RSP: 0018:ffffc9000ce4fa20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 1c32466592978100
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000ce4fb30 R08: ffffffff8174a13c R09: 1ffff11003f8519a
R10: dffffc0000000000 R11: ffffed1003f8519b R12: 0000000000000050
R13: 0000000000000000 R14: 1ffff920019c9f4c R15: 000000000000000a
FS:  0000555595511380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fdcfd20000 CR3: 0000000043170000 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
 vfs_create+0x23c/0x3d0 fs/namei.c:3294
 do_mknodat+0x447/0x5b0 fs/namei.c:4185
 __do_sys_mknod fs/namei.c:4218 [inline]
 __se_sys_mknod fs/namei.c:4216 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4216
 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: 0033:0x7f17ac91d9f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff56943258 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007fff56943428 RCX: 00007f17ac91d9f9
RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f17ac996610 R08: 0000000020000000 R09: 00007fff56943428
R10: 00007fff56943120 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff56943418 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sb_rdonly include/linux/fs.h:2292 [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 40 e9 42 8c 48 89 74 24 08 4c 89 f9 e8 4c 22 9c 08 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 48 5e d6 fe 49 8b 1c 24 48 89 de
RSP: 0018:ffffc9000ce4fa20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 1c32466592978100
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000ce4fb30 R08: ffffffff8174a13c R09: 1ffff11003f8519a
R10: dffffc0000000000 R11: ffffed1003f8519b R12: 0000000000000050
R13: 0000000000000000 R14: 1ffff920019c9f4c R15: 000000000000000a
FS:  0000555595511380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fdcfd20000 CR3: 0000000043170000 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 40 e9 42 8c 48 89 	movl   $0x89488c42,-0x17(%rax)
   a:	74 24                	je     0x30
   c:	08 4c 89 f9          	or     %cl,-0x7(%rcx,%rcx,4)
  10:	e8 4c 22 9c 08       	call   0x89c2261
  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 48 5e d6 fe       	call   0xfed65e81
  39:	49 8b 1c 24          	mov    (%r12),%rbx
  3d:	48 89 de             	mov    %rbx,%rsi


---
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