BUG: unable to handle kernel NULL pointer dereference at 0000000000000268
IP: atomic_add_return arch/x86/include/asm/atomic.h:157 [inline]
IP: rxrpc_send_data_packet+0xc8/0x1330 net/rxrpc/output.c:281
PGD 69b83067 P4D 69b83067 PUD 69b84067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krxrpcd rxrpc_process_call
task: ffff8880a9d644c0 task.stack: ffff8880a9d70000
RIP: 0010:atomic_add_return arch/x86/include/asm/atomic.h:157 [inline]
RIP: 0010:rxrpc_send_data_packet+0xc8/0x1330 net/rxrpc/output.c:281
RSP: 0018:ffff8880a9d77ab0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffff110153ac9b1
RDX: 0000000000000000 RSI: ffff888062301680 RDI: ffff8880a8e9cc10
RBP: ffff8880a9d77c60 R08: 0000000000000001 R09: ffff8880a9d64d88
R10: ffff8880a9d77c78 R11: 0000000000000000 R12: ffff888062301680
R13: ffff8880a8e9cd18 R14: ffff888062301680 R15: ffff8880a8e9cc00
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000268 CR3: 0000000069b82000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxrpc_resend net/rxrpc/call_event.c:322 [inline]
 rxrpc_process_call+0x56f/0x1169 net/rxrpc/call_event.c:407
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: f3 c7 40 24 f3 f3 f3 f3 e8 66 95 7c fb 49 8d 7f 10 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 a6 10 00 00 49 8b 5f 10 b8 01 00 00 00 <f0> 0f c1 83 68 02 00 00 83 c0 01 48 89 da 48 c1 ea 03 89 85 8c 
RIP: atomic_add_return arch/x86/include/asm/atomic.h:157 [inline] RSP: ffff8880a9d77ab0
RIP: rxrpc_send_data_packet+0xc8/0x1330 net/rxrpc/output.c:281 RSP: ffff8880a9d77ab0
CR2: 0000000000000268
---[ end trace a21a3375ef7433ba ]---