============================= WARNING: suspicious RCU usage 4.15.0-rc8+ #199 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-executor7/31484: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000cac6e855>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000cac6e855>] do_ipv6_setsockopt.isra.9+0x23d/0x39a0 net/ipv6/ipv6_sockglue.c:167 stack backtrace: CPU: 1 PID: 31484 Comm: syz-executor7 Not tainted 4.15.0-rc8+ #199 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 do_ipv6_setsockopt.isra.9+0x50a/0x39a0 net/ipv6/ipv6_sockglue.c:898 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1823 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1802 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452ee9 RSP: 002b:00007f56a4e34c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ee9 RDX: 0000000000000020 RSI: 0000000000000029 RDI: 0000000000000013 RBP: 0000000000000374 R08: 0000000000000020 R09: 0000000000000000 R10: 0000000020a1afe0 R11: 0000000000000212 R12: 00000000006f4380 R13: 00000000ffffffff R14: 00007f56a4e356d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc8+ #199 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-executor7/31484: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000cac6e855>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000cac6e855>] do_ipv6_setsockopt.isra.9+0x23d/0x39a0 net/ipv6/ipv6_sockglue.c:167 stack backtrace: CPU: 1 PID: 31484 Comm: syz-executor7 Not tainted 4.15.0-rc8+ #199 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 do_ipv6_setsockopt.isra.9+0x50a/0x39a0 net/ipv6/ipv6_sockglue.c:898 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1823 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1802 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452ee9 RSP: 002b:00007f56a4e34c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ee9 RDX: 0000000000000020 RSI: 0000000000000029 RDI: 0000000000000013 RBP: 0000000000000374 R08: 0000000000000020 R09: 0000000000000000 R10: 0000000020a1afe0 R11: 0000000000000212 R12: 00000000006f4380 R13: 00000000ffffffff R14: 00007f56a4e356d4 R15: 0000000000000000 openvswitch: netlink: Message has 4 unknown bytes. netlink: 'syz-executor1': attribute type 2 has an invalid length. netlink: 'syz-executor1': attribute type 2 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pig=31831 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pig=31849 comm=syz-executor0 Trying to set illegal importance in message Trying to set illegal importance in message netlink: 'syz-executor5': attribute type 2 has an invalid length. netlink: 'syz-executor5': attribute type 2 has an invalid length. IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 netlink: 'syz-executor2': attribute type 2 has an invalid length. netlink: 'syz-executor3': attribute type 2 has an invalid length. netlink: 'syz-executor3': attribute type 2 has an invalid length. sctp: [Deprecated]: syz-executor7 (pid 32593) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor7 (pid 32610) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead netlink: 'syz-executor2': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor2': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor1': attribute type 4 has an invalid length. sctp: [Deprecated]: syz-executor0 (pid 401) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor0 (pid 386) Use of int in maxseg socket option. Use struct sctp_assoc_value instead l2tp_ppp: sess 59/32096: set debug=f55d40e l2tp_ppp: sess 59/32096: set mtu=0 validate_nla: 2 callbacks suppressed netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 4 has an invalid length. netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 4 has an invalid length. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=33 sclass=netlink_tcpdiag_socket pig=1385 comm=syz-executor6 dccp_close: ABORT with 214 bytes unread SELinux: unrecognized netlink message: protocol=4 nlmsg_type=407 sclass=netlink_tcpdiag_socket pig=1414 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=407 sclass=netlink_tcpdiag_socket pig=1422 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=38292 sclass=netlink_route_socket pig=1419 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=38292 sclass=netlink_route_socket pig=1419 comm=syz-executor0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor4': attribute type 2 has an invalid length. netlink: 'syz-executor4': attribute type 2 has an invalid length. dccp_close: ABORT with 214 bytes unread sit: non-ECT from 172.20.0.187 with TOS=0x1 sit: non-ECT from 172.20.0.187 with TOS=0x1