general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf]
CPU: 0 PID: 26900 Comm: kworker/u4:6 Not tainted 5.6.0-rc3-next-20200225-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:skb_put+0x35/0x1d0 net/core/skbuff.c:1860
Code: 89 f5 41 54 49 89 fc 53 4d 8d b4 24 b8 00 00 00 48 83 ec 08 e8 bc 54 3e fb 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4c
RSP: 0018:ffffc90017737b20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880a027c400 RCX: ffffffff85a5ec5c
RDX: 0000000000000017 RSI: ffffffff86379fe4 RDI: 0000000000000000
RBP: ffffc90017737b50 R08: ffff8880424e61c0 R09: ffffed10128f8a84
R10: ffffed10128f8a83 R11: ffff8880947c541f R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000000b8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc09631ff8 CR3: 0000000047c1f000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_put_data include/linux/skbuff.h:2282 [inline]
 bcsp_unslip_one_byte drivers/bluetooth/hci_bcsp.c:436 [inline]
 bcsp_recv+0xa06/0x1430 drivers/bluetooth/hci_bcsp.c:598
 hci_uart_tty_receive+0x278/0x760 drivers/bluetooth/hci_ldisc.c:613
 tty_ldisc_receive_buf+0x15f/0x1c0 drivers/tty/tty_buffer.c:465
 tty_port_default_receive_buf+0x7d/0xb0 drivers/tty/tty_port.c:38
 receive_buf drivers/tty/tty_buffer.c:481 [inline]
 flush_to_ldisc+0x222/0x390 drivers/tty/tty_buffer.c:533
 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2266
 worker_thread+0x98/0xe40 kernel/workqueue.c:2412
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 9dd87da4427623d6 ]---
RIP: 0010:skb_put+0x35/0x1d0 net/core/skbuff.c:1860
Code: 89 f5 41 54 49 89 fc 53 4d 8d b4 24 b8 00 00 00 48 83 ec 08 e8 bc 54 3e fb 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4c
RSP: 0018:ffffc90017737b20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880a027c400 RCX: ffffffff85a5ec5c
RDX: 0000000000000017 RSI: ffffffff86379fe4 RDI: 0000000000000000
RBP: ffffc90017737b50 R08: ffff8880424e61c0 R09: ffffed10128f8a84
R10: ffffed10128f8a83 R11: ffff8880947c541f R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000000b8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31722000 CR3: 00000000a2ebc000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400