BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 27872 Comm: syz-executor.3 Not tainted 4.14.231-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 add_chain_cache kernel/locking/lockdep.c:2303 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline] validate_chain kernel/locking/lockdep.c:2435 [inline] __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 try_to_wake_up+0x6a/0x1100 kernel/sched/core.c:1997 wake_up_worker kernel/workqueue.c:840 [inline] insert_work+0x226/0x2c0 kernel/workqueue.c:1313 __queue_work+0x4f3/0xf70 kernel/workqueue.c:1465 __queue_delayed_work+0x1f3/0x2a0 kernel/workqueue.c:1527 mod_delayed_work_on+0x97/0x190 kernel/workqueue.c:1601 mod_delayed_work include/linux/workqueue.h:521 [inline] wb_queue_work+0x1e0/0x480 fs/fs-writeback.c:200 bdi_split_work_to_wbs+0x39e/0xcf0 fs/fs-writeback.c:879 __writeback_inodes_sb_nr+0x159/0x1d0 fs/fs-writeback.c:2359 __sync_filesystem fs/sync.c:36 [inline] sync_filesystem fs/sync.c:64 [inline] sync_filesystem+0x8c/0x230 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:432 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: 0033:0x467a57 RSP: 002b:00007ffc94ccab48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000467a57 RDX: 00007ffc94ccac19 RSI: 0000000000000002 RDI: 00007ffc94ccac10 RBP: 00007ffc94ccac10 R08: 00000000ffffffff R09: 00007ffc94cca9e0 R10: 0000000001b8e8e3 R11: 0000000000000246 R12: 00000000004bed70 R13: 00007ffc94ccbce0 R14: 0000000001b8e810 R15: 00007ffc94ccbd20 print_req_error: I/O error, dev loop4, sector 0 print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, async page read EXT4-fs (loop4): Unrecognized mount option " -X`Ẕ-lm3x>jPHh`J[fݗ#ߓڛcꙣXfԸذcxz֮*ō6TBP8}ѣ|D7^"ϳ.zѷs"GftM&ҘIQܞj@4i~P{qL 'lE" or missing value Bluetooth: hci3 command 0x0406 tx timeout netlink: 16 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.4'.