Hello, syzbot found the following crash on: HEAD commit: f8788d86 Linux 5.6-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11b3d22de00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9833e26bab355358 dashboard link: https://syzkaller.appspot.com/bug?extid=28071e627252004acc02 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+28071e627252004acc02@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 1 PID: 3061 Comm: kworker/u5:0 Not tainted 5.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci1 hci_cmd_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:880 [inline] register_lock_class+0x179e/0x1850 kernel/locking/lockdep.c:1189 __lock_acquire+0xf4/0x4a00 kernel/locking/lockdep.c:3836 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 percpu_down_read include/linux/percpu-rwsem.h:40 [inline] hci_uart_send_frame+0x85/0x620 drivers/bluetooth/hci_ldisc.c:280 hci_send_frame+0x1bd/0x2d0 net/bluetooth/hci_core.c:3677 hci_cmd_work+0x162/0x2d0 net/bluetooth/hci_core.c:4598 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
