audit: type=1400 audit(1559021698.502:2369): avc: denied { create } for pid=17081 comm="syz-executor.1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 =============================== [ INFO: suspicious RCU usage. ] 4.4.174+ #17 Not tainted ------------------------------- net/ipv4/xfrm4_protocol.c:80 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 no locks held by syz-executor.3/17104. stack backtrace: CPU: 0 PID: 17104 Comm: syz-executor.3 Not tainted 4.4.174+ #17 0000000000000000 9affab2132d8daf7 ffff88018f5a7750 ffffffff81aad1a1 ffffffff831af4e0 0000000000000000 0000000000000001 0000000000000050 ffff8801bbc917c0 ffff88018f5a7780 ffffffff813ab7d6 ffff8800b7f47640 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] lockdep_rcu_suspicious.cold+0x10a/0x149 kernel/locking/lockdep.c:4305 [] xfrm4_rcv_encap+0x30a/0x370 net/ipv4/xfrm4_protocol.c:80 [] xfrm4_udp_encap_rcv+0x3f5/0x620 net/ipv4/xfrm4_input.c:148 [] udp_queue_rcv_skb+0xe57/0x14e0 net/ipv4/udp.c:1547 [] sk_backlog_rcv include/net/sock.h:875 [inline] [] __release_sock net/core/sock.c:2024 [inline] [] release_sock+0x170/0x500 net/core/sock.c:2477 [] udp_sendmsg+0x1176/0x1c60 net/ipv4/udp.c:1107 [] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:648 [] sock_write_iter+0x235/0x3d0 net/socket.c:847 [] new_sync_write fs/read_write.c:480 [inline] [] __vfs_write+0x2e8/0x3d0 fs/read_write.c:493 [] vfs_write+0x182/0x4e0 fs/read_write.c:540 [] SYSC_write fs/read_write.c:587 [inline] [] SyS_write+0xdc/0x1c0 fs/read_write.c:579 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a audit: type=1400 audit(1559021699.662:2370): avc: denied { create } for pid=17115 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Dropping request. Check SNMP counters. audit: type=1400 audit(1559021699.792:2371): avc: denied { create } for pid=17115 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit_printk_skb: 21 callbacks suppressed audit: type=1400 audit(1559021700.752:2379): avc: denied { create } for pid=17156 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1400 audit(1559021701.392:2380): avc: denied { create } for pid=17182 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1326 audit(1559021701.482:2381): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17172 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=40000003 syscall=265 compat=1 ip=0xf7776bf9 code=0x0 audit: type=1400 audit(1559021701.662:2382): avc: denied { create } for pid=17172 comm="syz-executor.1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 audit: type=1400 audit(1559021702.072:2383): avc: denied { create } for pid=17207 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1400 audit(1559021702.632:2384): avc: denied { create } for pid=17234 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1326 audit(1559021702.892:2385): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17237 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=40000003 syscall=265 compat=1 ip=0xf7776bf9 code=0x0 audit: type=1400 audit(1559021702.932:2386): avc: denied { create } for pid=17237 comm="syz-executor.1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 audit: type=1400 audit(1559021703.182:2387): avc: denied { create } for pid=17262 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1326 audit(1559021703.862:2388): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17281 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=40000003 syscall=265 compat=1 ip=0xf7776bf9 code=0x0 audit_printk_skb: 9 callbacks suppressed audit: type=1326 audit(1559021706.822:2392): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17374 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=40000003 syscall=265 compat=1 ip=0xf7776bf9 code=0x0 audit: type=1326 audit(1559021707.812:2393): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17409 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=40000003 syscall=265 compat=1 ip=0xf7776bf9 code=0x0