EXT4-fs warning (device loop5): ext4_multi_mount_protect:287: Invalid MMP block in superblock
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4427 at fs/ext4/xattr.c:1660 ext4_xattr_set_entry+0x24c1/0x30f0 fs/ext4/xattr.c:1660
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4427 Comm: syz-executor.1 Not tainted 4.14.210-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+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 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:ext4_xattr_set_entry+0x24c1/0x30f0 fs/ext4/xattr.c:1660
RSP: 0018:ffff8880174f74b0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88809b4dbb20 RCX: ffffc9000b6df000
RDX: 000000000000054d RSI: ffffffff81cae1c1 RDI: ffff88805a36a460
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a1652580 R12: 00000000000003dc
R13: ffffffff87933000 R14: 0000000000000000 R15: ffff8880174f77a8
 ext4_xattr_block_set+0x1334/0x2af0 fs/ext4/xattr.c:1962
 ext4_xattr_set_handle+0x839/0xd20 fs/ext4/xattr.c:2410
 ext4_xattr_set+0x118/0x230 fs/ext4/xattr.c:2510
 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150
 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181
 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239
 vfs_setxattr+0xcf/0x230 fs/xattr.c:256
 setxattr+0x1a9/0x300 fs/xattr.c:523
 path_setxattr+0x118/0x130 fs/xattr.c:542
 SYSC_lsetxattr fs/xattr.c:564 [inline]
 SyS_lsetxattr+0x33/0x40 fs/xattr.c:560
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45deb9
RSP: 002b:00007f832af9ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 0000000000020b80 RCX: 000000000045deb9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020000080
RBP: 000000000119bf70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf2c
R13: 00007ffe13f041ff R14: 00007f832af9f9c0 R15: 000000000119bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..