Warning: Permanently added '10.128.1.118' (ECDSA) to the list of known hosts. executing program [ 29.046610] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.056196] ip_tables: iptables: counters copy to user failed while replacing table [ 29.065368] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.075253] ip_tables: iptables: counters copy to user failed while replacing table [ 29.088546] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.100596] ip_tables: iptables: counters copy to user failed while replacing table [ 29.109711] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.119237] ip_tables: iptables: counters copy to user failed while replacing table [ 29.131465] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.142391] ip_tables: iptables: counters copy to user failed while replacing table [ 29.152234] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.163115] ip_tables: iptables: counters copy to user failed while replacing table [ 29.176484] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.185777] ip_tables: iptables: counters copy to user failed while replacing table [ 29.194869] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.204883] ip_tables: iptables: counters copy to user failed while replacing table [ 29.207491] [ 29.214667] ============================= [ 29.219057] WARNING: suspicious RCU usage [ 29.223230] 4.14.249-syzkaller #0 Not tainted [ 29.227766] ----------------------------- [ 29.231957] net/netfilter/nf_queue.c:227 suspicious rcu_dereference_check() usage! [ 29.239950] [ 29.239950] other info that might help us debug this: [ 29.239950] [ 29.248059] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.248210] [ 29.248210] rcu_scheduler_active = 2, debug_locks = 1 [ 29.257513] ip_tables: iptables: counters copy to user failed while replacing table [ 29.263648] 2 locks held by ksoftirqd/0/7: [ 29.272210] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 29.275964] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x84e/0x1180 [ 29.275991] #1: [ 29.285270] ip_tables: iptables: counters copy to user failed while replacing table [ 29.293999] (&(&inst->lock)->rlock){+.-.}, at: [] nfqnl_flush+0x2f/0x2a0 [ 29.294022] [ 29.294022] stack backtrace: [ 29.294030] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.14.249-syzkaller #0 [ 29.294037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.334454] Call Trace: [ 29.337044] dump_stack+0x1b2/0x281 [ 29.340656] nf_reinject+0x56e/0x700 [ 29.344354] nfqnl_flush+0x1ab/0x2a0 [ 29.348155] instance_destroy_rcu+0x19/0x30 [ 29.352809] ? nfqnl_rcv_nl_event+0x290/0x290 [ 29.357315] rcu_process_callbacks+0x780/0x1180 [ 29.361991] ? note_gp_changes+0x2f0/0x2f0 [ 29.366356] ? sched_clock+0x2a/0x40 [ 29.370160] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.375619] __do_softirq+0x24d/0x9ff [ 29.379416] ? __local_bh_enable_ip+0x170/0x170 [ 29.384081] run_ksoftirqd+0x50/0x1a0 [ 29.387890] smpboot_thread_fn+0x5c1/0x920 [ 29.392197] ? sort_range+0x30/0x30 [ 29.395806] ? sort_range+0x30/0x30 [ 29.399703] kthread+0x30d/0x420 [ 29.403169] ? kthread_create_on_node+0xd0/0xd0 [ 29.407852] ret_from_fork+0x24/0x30 [ 34.044769] nla_parse: 1813 callbacks suppressed [ 34.044773] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.059132] net_ratelimit: 1814 callbacks suppressed [ 34.059135] ip_tables: iptables: counters copy to user failed while replacing table [ 34.073915] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.083241] ip_tables: iptables: counters copy to user failed while replacing table [ 34.094495] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.103971] ip_tables: iptables: counters copy to user failed while replacing table [ 34.112197] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.122324] ip_tables: iptables: counters copy to user failed while replacing table [ 34.134529] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.144159] ip_tables: iptables: counters copy to user failed while replacing table [ 34.152497] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.162617] ip_tables: iptables: counters copy to user failed while replacing table [ 34.175870] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.185184] ip_tables: iptables: counters copy to user failed while replacing table [ 34.193639] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.203154] ip_tables: iptables: counters copy to user failed while replacing table [ 34.214766] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.224179] ip_tables: iptables: counters copy to user failed while replacing table [ 34.232340] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 34.243197] ip_tables: iptables: counters copy to user failed while replacing table [ 39.050901] nla_parse: 1919 callbacks suppressed [ 39.050904] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.065228] net_ratelimit: 1919 callbacks suppressed [ 39.065230] ip_tables: iptables: counters copy to user failed while replacing table [ 39.083070] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.092766] ip_tables: iptables: counters copy to user failed while replacing table [ 39.101691] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.111347] ip_tables: iptables: counters copy to user failed while replacing table [ 39.123733] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.132908] ip_tables: iptables: counters copy to user failed while replacing table [ 39.141719] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.151732] ip_tables: iptables: counters copy to user failed while replacing table [ 39.163952] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.173191] ip_tables: iptables: counters copy to user failed while replacing table [ 39.182537] netlink: 12 bytes leftover after parsing attributes in process `syz-executor046'. [ 39.192214] ip_tables: iptables: counters copy to user failed while replacing table