__blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x540/0x1830 block/ioctl.c:594
------------[ cut here ]------------
 block_ioctl+0xd9/0x120 fs/block_dev.c:1893
WARNING: CPU: 1 PID: 24185 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
Kernel panic - not syncing: panic_on_warn set ...

 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fae0dc3a037
RSP: 002b:00007fae0c5aef28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fae0dc83a20 RCX: 00007fae0dc3a037
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 00007fae0c5af1d0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020003280 R15: 0000000000000000
CPU: 1 PID: 24185 Comm: syz-executor.2 Not tainted 4.14.290-syzkaller #0
ufs: You didn't specify the type of your ufs filesystem

mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...

>>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
ufs: ufs_fill_super(): bad magic number
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0018:ffff8880b3aafbc8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900079ed000
RDX: 0000000000040000 RSI: ffffffff81875ece RDI: ffff8880b1fea6f0
RBP: ffff8880b4ab0d80 R08: ffffffff8b9a7488 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888097bfc240 R12: ffff8880b1fea240
R13: ffffffff891ba270 R14: ffffffff88f45760 R15: dffffc0000000000
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9c4/0xc10 fs/super.c:537
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x360 fs/super.c:1107
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fe6519fe7aa
RSP: 002b:00007fe650371f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020003280 RCX: 00007fe6519fe7aa
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007fe650371fe0
RBP: 00007fe650372020 R08: 00007fe650372020 R09: 0000000020000000
R10: 0000000000000001 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000040 R14: 00007fe650371fe0 R15: 0000000020003340
Kernel Offset: disabled
Rebooting in 86400 seconds..