MINIX-fs: unable to read superblock
MINIX-fs: unable to read superblock
MINIX-fs: get root inode failed
MINIX-fs: get root inode failed
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8079 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8079 Comm: syz-executor415 Not tainted 4.14.285-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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
 __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:mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
RSP: 0018:ffff88809568fd08 EFLAGS: 00010297
RAX: ffff888098030680 RBX: ffff88808dec2540 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 1ffff11012ad1fa4 RDI: ffff88808dec2540
RBP: ffff8880a5d9ec00 R08: 0000000000000286 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880af8d4880
R13: 0000000000000000 R14: 0000000000000007 R15: fffffbfff14123ae
 minix_put_super+0x179/0x4a0 fs/minix/inode.c:48
 generic_shutdown_super+0x144/0x370 fs/super.c:446
 kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f72242354e9
RSP: 002b:00007f72241c12f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007f72242ba3f0 RCX: 00007f72242354e9
RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200002c0
RBP: 00007f72242870c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6f6c2f7665642f R14: 000000807fffffff R15: 00007f72242ba3f8
Kernel Offset: disabled
Rebooting in 86400 seconds..