nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. ============================= WARNING: suspicious RCU usage 4.18.0-rc8+ #49 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-executor5/7021: #0: 000000007577df10 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1474 [inline] #0: 000000007577df10 (sk_lock-AF_INET6){+.+.}, at: sock_fasync+0x85/0x220 net/socket.c:1175 stack backtrace: CPU: 1 PID: 7021 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #49 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4562 ireq_opt_deref include/net/inet_sock.h:135 [inline] inet_csk_route_req+0x96b/0xdb0 net/ipv4/inet_connection_sock.c:538 dccp_v4_send_response+0xb4/0x6d0 net/dccp/ipv4.c:485 dccp_v4_conn_request+0xc6e/0x1380 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdb6/0x1660 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a30 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x935/0xb60 net/dccp/ipv6.c:579 sk_backlog_rcv include/net/sock.h:914 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2342 release_sock+0xad/0x2c0 net/core/sock.c:2851 sock_fasync+0x11e/0x220 net/socket.c:1184 __fput+0x68b/0x8b0 fs/file_table.c:206 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x313/0x370 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410941 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffc68447500 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000410941 RDX: 0000000000000002 RSI: 0000000000730be0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000140 R09: ffffffffffffffff R10: 00000000009301e0 R11: 0000000000000293 R12: 0000000000000007 R13: 00007ffc68447510 R14: 0000000000018bea R15: 000000000000000e ============================= WARNING: suspicious RCU usage 4.18.0-rc8+ #49 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-executor5/7021: #0: 000000007577df10 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1474 [inline] #0: 000000007577df10 (sk_lock-AF_INET6){+.+.}, at: sock_fasync+0x85/0x220 net/socket.c:1175 stack backtrace: CPU: 1 PID: 7021 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #49 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4562 ireq_opt_deref include/net/inet_sock.h:135 [inline] dccp_v4_send_response+0x537/0x6d0 net/dccp/ipv4.c:496 dccp_v4_conn_request+0xc6e/0x1380 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdb6/0x1660 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a30 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x935/0xb60 net/dccp/ipv6.c:579 sk_backlog_rcv include/net/sock.h:914 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2342 release_sock+0xad/0x2c0 net/core/sock.c:2851 sock_fasync+0x11e/0x220 net/socket.c:1184 __fput+0x68b/0x8b0 fs/file_table.c:206 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x313/0x370 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410941 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffc68447500 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000410941 RDX: 0000000000000002 RSI: 0000000000730be0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000140 R09: ffffffffffffffff R10: 00000000009301e0 R11: 0000000000000293 R12: 0000000000000007 R13: 00007ffc68447510 R14: 0000000000018bea R15: 000000000000000e x_tables: duplicate underflow at hook 4 x_tables: duplicate underflow at hook 4 cannot load conntrack support for proto=7 cannot load conntrack support for proto=7 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. x_tables: duplicate underflow at hook 4 x_tables: duplicate underflow at hook 4 syz-executor3 (7354) used greatest stack depth: 16392 bytes left nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor7'. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 openvswitch: netlink: Flow get message rejected, Key attribute missing. netlink: 124 bytes leftover after parsing attributes in process `syz-executor5'. openvswitch: netlink: Flow get message rejected, Key attribute missing. x_tables: eb_tables: snat target: used from hooks PREROUTING, but only usable from POSTROUTING IPVS: length: 117 != 24 kernel msg: ebtables bug: please report to author: bad policy kernel msg: ebtables bug: please report to author: bad policy kernel msg: ebtables bug: please report to author: bad policy 8021q: VLANs not supported on lo 8021q: VLANs not supported on lo raw_sendmsg: syz-executor6 forgot to set AF_INET. Fix it! netlink: 24 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor4'. Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable netlink: 4 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 22 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor7'.