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+0xc8/0x13f0 net/rxrpc/output.c:281 PGD 8fc22067 P4D 8fc22067 PUD 4548a067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krxrpcd rxrpc_process_call task: ffff8880a9ecc640 task.stack: ffff8880a9ed8000 RIP: 0010:atomic_add_return arch/x86/include/asm/atomic.h:157 [inline] RIP: 0010:rxrpc_send_data_packet+0xc8/0x13f0 net/rxrpc/output.c:281 RSP: 0018:ffff8880a9edfab0 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffff110153d99e1 RDX: 0000000000000000 RSI: ffff88808f771140 RDI: ffff88803e356810 RBP: ffff8880a9edfc60 R08: 0000000000000001 R09: ffff8880a9eccf08 R10: ffff8880a9edfc78 R11: 0000000000000000 R12: ffff88808f771140 R13: ffff88803e356918 R14: ffff88803e356800 R15: ffff88808f771140 FS: 0000000000000000(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000268 CR3: 00000000361ea000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pig=22674 comm=syz-executor.4 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 f6 64 7b fb 49 8d 7e 10 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 31 11 00 00 49 8b 5e 10 b8 01 00 00 00 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: ffff8880a9edfab0 RIP: rxrpc_send_data_packet+0xc8/0x13f0 net/rxrpc/output.c:281 RSP: ffff8880a9edfab0 CR2: 0000000000000268 ---[ end trace c70d6886ae6eb87c ]---