XFS (nullb0): Invalid superblock magic number
BUG: MAX_STACK_TRACE_ENTRIES too low!
turning off the locking correctness validator.
CPU: 0 PID: 16025 Comm: syz-executor072 Not tainted 5.2.0-next-20190709 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 save_trace kernel/locking/lockdep.c:473 [inline]
 save_trace.isra.0.cold+0x14/0x19 kernel/locking/lockdep.c:458
 check_prev_add kernel/locking/lockdep.c:2447 [inline]
 check_prevs_add kernel/locking/lockdep.c:2507 [inline]
 validate_chain kernel/locking/lockdep.c:2897 [inline]
 __lock_acquire+0x2d2a/0x4c30 kernel/locking/lockdep.c:3880
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413
 flush_workqueue+0x126/0x14b0 kernel/workqueue.c:2774
 drain_workqueue+0x1b4/0x470 kernel/workqueue.c:2939
 destroy_workqueue+0x21/0x6c0 kernel/workqueue.c:4320
 xfs_destroy_mount_workqueues+0x97/0x150 fs/xfs/xfs_super.c:862
 xfs_fs_fill_super+0x90f/0x16e0 fs/xfs/xfs_super.c:1755
 mount_bdev+0x304/0x3c0 fs/super.c:1408
 xfs_fs_mount+0x35/0x40 fs/xfs/xfs_super.c:1803
 legacy_get_tree+0x113/0x220 fs/fs_context.c:651
 vfs_get_tree+0x8f/0x380 fs/super.c:1483
 do_new_mount fs/namespace.c:2783 [inline]
 do_mount+0x13b3/0x1c30 fs/namespace.c:3103
 ksys_mount+0xdb/0x150 fs/namespace.c:3312
 __do_sys_mount fs/namespace.c:3326 [inline]
 __se_sys_mount fs/namespace.c:3323 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3323
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441179
Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff97543ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441179
RDX: 0000000020000300 RSI: 0000000020000280 RDI: 0000000020000240
RBP: 0000000000125da9 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401fa0
R13: 0000000000402030 R14: 0000000000000000 R15: 0000000000000000