============================= WARNING: suspicious RCU usage 4.15.0-rc9+ #211 Not tainted ----------------------------- ./include/net/inet_sock.h:136 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor7/8321: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000d765e6e4>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000d765e6e4>] inet_dccp_listen+0x43/0x1e0 net/dccp/proto.c:938 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=8292 comm=syz-executor0 stack backtrace: CPU: 0 PID: 8321 Comm: syz-executor7 Not tainted 4.15.0-rc9+ #211 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 ireq_opt_deref include/net/inet_sock.h:135 [inline] inet_csk_route_req+0x824/0xca0 net/ipv4/inet_connection_sock.c:544 dccp_v4_send_response+0xa7/0x650 net/dccp/ipv4.c:485 dccp_v4_conn_request+0x9ee/0x11b0 net/dccp/ipv4.c:633 dccp_v6_conn_request+0xd30/0x1350 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x574/0x1620 net/dccp/input.c:612 dccp_v4_do_rcv+0xf1/0x160 net/dccp/ipv4.c:682 dccp_v6_do_rcv+0x823/0x9c0 net/dccp/ipv6.c:578 sk_backlog_rcv include/net/sock.h:908 [inline] __release_sock+0x124/0x360 net/core/sock.c:2274 release_sock+0xa4/0x2a0 net/core/sock.c:2789 inet_dccp_listen+0x11b/0x1e0 net/dccp/proto.c:964 SYSC_listen net/socket.c:1503 [inline] SyS_listen+0x1aa/0x350 net/socket.c:1489 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452f19 RSP: 002b:00007f361cf96c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f19 RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000000000000013 RBP: 0000000000000026 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ef430 R13: 00000000ffffffff R14: 00007f361cf976d4 R15: 0000000000000002 ============================= WARNING: suspicious RCU usage 4.15.0-rc9+ #211 Not tainted ----------------------------- ./include/net/inet_sock.h:136 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor7/8321: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000d765e6e4>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000d765e6e4>] inet_dccp_listen+0x43/0x1e0 net/dccp/proto.c:938 stack backtrace: CPU: 0 PID: 8321 Comm: syz-executor7 Not tainted 4.15.0-rc9+ #211 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 ireq_opt_deref include/net/inet_sock.h:135 [inline] dccp_v4_send_response+0x4b6/0x650 net/dccp/ipv4.c:496 dccp_v4_conn_request+0x9ee/0x11b0 net/dccp/ipv4.c:633 dccp_v6_conn_request+0xd30/0x1350 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x574/0x1620 net/dccp/input.c:612 dccp_v4_do_rcv+0xf1/0x160 net/dccp/ipv4.c:682 dccp_v6_do_rcv+0x823/0x9c0 net/dccp/ipv6.c:578 sk_backlog_rcv include/net/sock.h:908 [inline] __release_sock+0x124/0x360 net/core/sock.c:2274 release_sock+0xa4/0x2a0 net/core/sock.c:2789 inet_dccp_listen+0x11b/0x1e0 net/dccp/proto.c:964 SYSC_listen net/socket.c:1503 [inline] SyS_listen+0x1aa/0x350 net/socket.c:1489 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452f19 RSP: 002b:00007f361cf96c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f19 RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000000000000013 RBP: 0000000000000026 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ef430 R13: 00000000ffffffff R14: 00007f361cf976d4 R15: 0000000000000002 audit: type=1400 audit(1517040673.912:55): avc: denied { setopt } for pid=8349 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 'syz-executor0': attribute type 1 has an invalid length. audit: type=1400 audit(1517040673.913:56): avc: denied { write } for pid=8349 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 sctp: [Deprecated]: syz-executor1 (pid 8424) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517040674.219:57): avc: denied { read } for pid=8430 comm="syz-executor0" 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=1 sctp: [Deprecated]: syz-executor1 (pid 8444) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 'syz-executor2': attribute type 3 has an invalid length. netlink: 'syz-executor2': attribute type 3 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 'syz-executor3': attribute type 1 has an invalid length. openvswitch: netlink: Message has 4 unknown bytes. Dead loop on virtual device ip6_vti0, fix it urgently! Dead loop on virtual device ip6_vti0, fix it urgently! audit: type=1400 audit(1517040676.030:58): avc: denied { create } for pid=9007 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_rdma_socket permissive=1 device syz2 entered promiscuous mode netlink: 'syz-executor5': attribute type 4 has an invalid length. netlink: 17 bytes leftover after parsing attributes in process `syz-executor5'. device syz2 left promiscuous mode netlink: 'syz-executor5': attribute type 4 has an invalid length. netlink: 17 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. audit: type=1400 audit(1517040676.884:59): avc: denied { listen } for pid=9300 comm="syz-executor4" 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=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=53 sclass=netlink_route_socket pig=9367 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=33 sclass=netlink_tcpdiag_socket pig=9443 comm=syz-executor5 Bearer <> rejected, not supported in standalone mode Bearer <> rejected, not supported in standalone mode IPv4: Oversized IP packet from 127.0.0.1 syz-executor0 (9617) used greatest stack depth: 12928 bytes left netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. audit: type=1400 audit(1517040679.036:60): avc: denied { getopt } for pid=10020 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=10168 comm=syz-executor6 device syz4 entered promiscuous mode netlink: 'syz-executor7': attribute type 18 has an invalid length. device syz4 left promiscuous mode netlink: 72 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. device syz1 entered promiscuous mode netlink: 'syz-executor3': attribute type 21 has an invalid length. netlink: 'syz-executor3': attribute type 21 has an invalid length. audit: type=1400 audit(1517040680.548:61): avc: denied { map } for pid=10505 comm="syz-executor1" path="socket:[20800]" dev="sockfs" ino=20800 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_route_socket permissive=1 netlink: 'syz-executor0': attribute type 21 has an invalid length. openvswitch: netlink: Either Ethernet header or EtherType is required. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=38819 sclass=netlink_route_socket pig=10656 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=38819 sclass=netlink_route_socket pig=10656 comm=syz-executor5 do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app openvswitch: netlink: Flow set message rejected, Key attribute missing. openvswitch: netlink: Flow set message rejected, Key attribute missing. l2tp_ppp: sess 59/32096: set debug=f55d40e netlink: 172 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 172 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 9 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 9 bytes leftover after parsing attributes in process `syz-executor0'.