kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 10964 Comm: kworker/u4:7 Not tainted 4.14.206-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
task: ffff888063178500 task.stack: ffff88808d8d0000
RIP: 0010:skb_tail_pointer include/linux/skbuff.h:2029 [inline]
RIP: 0010:skb_put+0x29/0x170 net/core/skbuff.c:1694
RSP: 0018:ffff88808d8d7b40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888059eb6a40 RCX: 1ffffffff1073d09
RDX: 000000000000001a RSI: 0000000000000001 RDI: 00000000000000d0
RBP: 0000000000000000 R08: ffff888059eb6b9c R09: 0000000000050a53
R10: ffff888063178e28 R11: ffff888063178500 R12: 0000000000000001
R13: 0000000000000001 R14: ffffed100b3d6d66 R15: ffff888059eb6b38
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005147b0 CR3: 000000009b21c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_put_data include/linux/skbuff.h:2109 [inline]
 bcsp_unslip_one_byte drivers/bluetooth/hci_bcsp.c:450 [inline]
 bcsp_recv+0x84c/0x15b0 drivers/bluetooth/hci_bcsp.c:612
 hci_uart_tty_receive+0x1ec/0x4c0 drivers/bluetooth/hci_ldisc.c:617
 tty_ldisc_receive_buf+0x12e/0x170 drivers/tty/tty_buffer.c:459
 tty_port_default_receive_buf+0x6e/0xa0 drivers/tty/tty_port.c:37
 receive_buf drivers/tty/tty_buffer.c:475 [inline]
 flush_to_ldisc+0x1dd/0x3f0 drivers/tty/tty_buffer.c:527
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 2f b4 7d fb 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8d bd c8 00 00 00 4c 8b ad d0 
RIP: skb_tail_pointer include/linux/skbuff.h:2029 [inline] RSP: ffff88808d8d7b40
RIP: skb_put+0x29/0x170 net/core/skbuff.c:1694 RSP: ffff88808d8d7b40
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
---[ end trace aa065551e2366246 ]---