general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.9.0-rc4-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_tail_pointer include/linux/skbuff.h:2193 [inline]
RIP: 0010:skb_put+0x2b/0x180 net/core/skbuff.c:1862
Code: 56 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 bd 6f 3d fb 48 8d bd c0 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 34 01 00 00 48 8d bd b8 00 00 00 4c 8b ad c0 00
RSP: 0018:ffffc90000cdfaa8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880134b5400 RCX: ffffffff85a40194
RDX: 0000000000000018 RSI: ffffffff8636ddc3 RDI: 00000000000000c0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880897d201f
R10: 00000000000000db R11: 0000000000000000 R12: 0000000000000001
R13: ffff888044c7c82a R14: ffff8880134b5510 R15: ffff8880134b557c
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f424000 CR3: 0000000097cdb000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_put_data include/linux/skbuff.h:2273 [inline]
 bcsp_unslip_one_byte drivers/bluetooth/hci_bcsp.c:436 [inline]
 bcsp_recv+0xa76/0x1460 drivers/bluetooth/hci_bcsp.c:598
 hci_uart_tty_receive+0x270/0x740 drivers/bluetooth/hci_ldisc.c:613
 tty_ldisc_receive_buf+0x14a/0x190 drivers/tty/tty_buffer.c:465
 tty_port_default_receive_buf+0x6e/0xa0 drivers/tty/tty_port.c:38
 receive_buf drivers/tty/tty_buffer.c:481 [inline]
 flush_to_ldisc+0x20d/0x380 drivers/tty/tty_buffer.c:533
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace af03cb17a62df7f6 ]---
RIP: 0010:skb_tail_pointer include/linux/skbuff.h:2193 [inline]
RIP: 0010:skb_put+0x2b/0x180 net/core/skbuff.c:1862
Code: 56 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 bd 6f 3d fb 48 8d bd c0 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 34 01 00 00 48 8d bd b8 00 00 00 4c 8b ad c0 00
RSP: 0018:ffffc90000cdfaa8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880134b5400 RCX: ffffffff85a40194
RDX: 0000000000000018 RSI: ffffffff8636ddc3 RDI: 00000000000000c0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880897d201f
R10: 00000000000000db R11: 0000000000000000 R12: 0000000000000001
R13: ffff888044c7c82a R14: ffff8880134b5510 R15: ffff8880134b557c
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005556f3d4a160 CR3: 00000000902ff000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400