capability: warning: `syz-executor.1' uses 32-bit capabilities (legacy support in use) Bluetooth: hci5 command 0x0405 tx timeout INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 0 PID: 11920 Comm: syz-executor.0 Not tainted 4.14.230-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 register_lock_class+0x32b/0x1320 kernel/locking/lockdep.c:768 __lock_acquire+0x167/0x3f20 kernel/locking/lockdep.c:3378 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 skb_dequeue+0x1c/0x180 net/core/skbuff.c:2831 skb_queue_purge+0x21/0x30 net/core/skbuff.c:2869 l2cap_chan_del+0x56d/0x950 net/bluetooth/l2cap_core.c:637 l2cap_chan_close+0x103/0x870 net/bluetooth/l2cap_core.c:757 l2cap_sock_shutdown+0x2e7/0xc20 net/bluetooth/l2cap_sock.c:1160 l2cap_sock_release+0x77/0x280 net/bluetooth/l2cap_sock.c:1203 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 get_signal+0x18a3/0x1ca0 kernel/signal.c:2234 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 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: 0033:0x466459 RSP: 002b:00007fc925421188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: fffffffffffffffc RBX: 000000000056bf60 RCX: 0000000000466459 RDX: 000000000000000e RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fffb5b382ff R14: 00007fc925421300 R15: 0000000000022000 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. attempt to access beyond end of device loop4: rw=2049, want=272, limit=146 attempt to access beyond end of device loop4: rw=2049, want=264, limit=146 buffer_io_error: 13 callbacks suppressed Buffer I/O error on dev loop4, logical block 263, lost async page write attempt to access beyond end of device loop4: rw=2049, want=265, limit=146 Buffer I/O error on dev loop4, logical block 264, lost async page write attempt to access beyond end of device loop4: rw=2049, want=266, limit=146 Buffer I/O error on dev loop4, logical block 265, lost async page write attempt to access beyond end of device loop4: rw=2049, want=264, limit=146 Buffer I/O error on dev loop4, logical block 263, lost async page write attempt to access beyond end of device loop4: rw=2049, want=400, limit=146 attempt to access beyond end of device loop4: rw=2049, want=392, limit=146 Buffer I/O error on dev loop4, logical block 391, lost async page write attempt to access beyond end of device loop4: rw=2049, want=393, limit=146 Buffer I/O error on dev loop4, logical block 392, lost async page write attempt to access beyond end of device loop4: rw=2049, want=394, limit=146 Buffer I/O error on dev loop4, logical block 393, lost async page write audit: type=1107 audit(1618231278.968:8): pid=12337 uid=0 auid=4294967295 ses=4294967295 msg='¥' EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): Couldn't mount because of unsupported optional features (8e0000) EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): Couldn't mount because of unsupported optional features (8e0000)