EXT4-fs (loop3): mounting ext3 file system using the ext4 subsystem
EXT4-fs error (device loop3): ext4_get_journal_inode:5779: inode #3: comm syz-executor.3: iget: special inode unallocated
EXT4-fs (loop3): no journal found
BUG: unable to handle page fault for address: ffffffffffffffdb
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD c979067 P4D c979067 PUD c97b067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6495 Comm: syz-executor.3 Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:ext4_calculate_overhead+0xfd2/0x1380 fs/ext4/super.c:4242
Code: 7b 50 48 89 fa 48 c1 ea 03 44 0f b6 60 14 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 72 03 00 00 44 89 e6 bf 3f 00 00 00 <48> 8b 6b 50 e8 55 d7 42 ff 41 80 fc 3f 0f 87 20 b9 f0 07 e8 16 dc
RSP: 0018:ffffc900056a79f8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffffffffff8b RCX: ffffc9000b8cc000
RDX: 1ffffffffffffffb RSI: 000000000000000a RDI: 000000000000003f
RBP: 0000000000000009 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000a
R13: ffff8880807d4000 R14: dffffc0000000000 R15: ffff8880807d2000
FS:  00007f15e2cab6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffdb CR3: 00000000279ff000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4_fill_super fs/ext4/super.c:5451 [inline]
 ext4_fill_super+0x85e3/0xade0 fs/ext4/super.c:5703
 get_tree_bdev+0x390/0x630 fs/super.c:1540
 vfs_get_tree+0x8c/0x370 fs/super.c:1713
 do_new_mount fs/namespace.c:3335 [inline]
 path_mount+0x1492/0x1ed0 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount fs/namespace.c:3861 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f15e1e7e1ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f15e2caaee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f15e2caaf80 RCX: 00007f15e1e7e1ea
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007f15e2caaf40
RBP: 0000000020000080 R08: 00007f15e2caaf80 R09: 00000000c0ed0006
R10: 00000000c0ed0006 R11: 0000000000000202 R12: 0000000020000040
R13: 00007f15e2caaf40 R14: 000000000000044e R15: 0000000020000140
 </TASK>
Modules linked in:
CR2: ffffffffffffffdb
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_calculate_overhead+0xfd2/0x1380 fs/ext4/super.c:4242
Code: 7b 50 48 89 fa 48 c1 ea 03 44 0f b6 60 14 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 72 03 00 00 44 89 e6 bf 3f 00 00 00 <48> 8b 6b 50 e8 55 d7 42 ff 41 80 fc 3f 0f 87 20 b9 f0 07 e8 16 dc
RSP: 0018:ffffc900056a79f8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffffffffff8b RCX: ffffc9000b8cc000
RDX: 1ffffffffffffffb RSI: 000000000000000a RDI: 000000000000003f
RBP: 0000000000000009 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000a
R13: ffff8880807d4000 R14: dffffc0000000000 R15: ffff8880807d2000
FS:  00007f15e2cab6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffdb CR3: 00000000279ff000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7b 50                	jnp    0x52
   2:	48 89 fa             	mov    %rdi,%rdx
   5:	48 c1 ea 03          	shr    $0x3,%rdx
   9:	44 0f b6 60 14       	movzbl 0x14(%rax),%r12d
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  1c:	0f 85 72 03 00 00    	jne    0x394
  22:	44 89 e6             	mov    %r12d,%esi
  25:	bf 3f 00 00 00       	mov    $0x3f,%edi
* 2a:	48 8b 6b 50          	mov    0x50(%rbx),%rbp <-- trapping instruction
  2e:	e8 55 d7 42 ff       	call   0xff42d788
  33:	41 80 fc 3f          	cmp    $0x3f,%r12b
  37:	0f 87 20 b9 f0 07    	ja     0x7f0b95d
  3d:	e8                   	.byte 0xe8
  3e:	16                   	(bad)
  3f:	dc                   	.byte 0xdc