XFS (loop1): Invalid superblock magic number BUG: MAX_STACK_TRACE_ENTRIES too low! turning off the locking correctness validator. CPU: 0 PID: 3922 Comm: syz-executor.1 Not tainted 5.2.0-next-20190718 #41 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 mark_lock+0x3db/0x11e0 kernel/locking/lockdep.c:3583 mark_usage kernel/locking/lockdep.c:3517 [inline] __lock_acquire+0x538/0x4c30 kernel/locking/lockdep.c:3834 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+0x69/0x150 fs/xfs/xfs_super.c:861 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:2791 [inline] do_mount+0x13b3/0x1c30 fs/namespace.c:3111 ksys_mount+0xdb/0x150 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3331 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c27a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9d 8d fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 7a 8d fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f685faeaa88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f685faeab40 RCX: 000000000045c27a RDX: 00007f685faeaae0 RSI: 0000000020000180 RDI: 00007f685faeab00 RBP: 0000000000000000 R08: 00007f685faeab40 R09: 00007f685faeaae0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000004 R13: 00000000004c8925 R14: 00000000004df5b0 R15: 00000000ffffffff kobject: 'loop1' (00000000a55cb792): kobject_uevent_env kobject: 'loop1' (00000000a55cb792): fill_kobj_path: path = '/devices/virtual/block/loop1'