sctp: failed to load transform for md5: -2 ====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #221 Not tainted ------------------------------------------------------ syz-executor4/5707 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<00000000182f977d>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000182f977d>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000326c6a51>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673 clusterip_config_entry_put net/ipv4/netfilter/ipt_CLUSTERIP.c:114 [inline] clusterip_tg_destroy+0x389/0x6e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:518 cleanup_entry+0x218/0x350 net/ipv4/netfilter/ip_tables.c:654 __do_replace+0x79d/0xa50 net/ipv4/netfilter/ip_tables.c:1089 do_replace net/ipv4/netfilter/ip_tables.c:1145 [inline] do_ipt_set_ctl+0x40f/0x5f0 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1259 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #1 (&xt[i].mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1088 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_ipt_get_ctl+0x159/0xac0 net/ipv4/netfilter/ip_tables.c:1699 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x15c/0x220 net/ipv4/ip_sockglue.c:1571 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Chain exists of: sk_lock-AF_INET --> &xt[i].mutex --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(&xt[i].mutex); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor4/5707: #0: (rtnl_mutex){+.+.}, at: [<00000000326c6a51>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5707 Comm: syz-executor4 Not tainted 4.15.0+ #221 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 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f2f29acfc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f2f29ad0700 RCX: 0000000000453299 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000000000 R08: 0000000000000090 R09: 0000000000000000 R10: 0000000020008000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f33f R14: 00007f2f29ad09c0 R15: 0000000000000000 device bridge0 entered promiscuous mode device bridge0 left promiscuous mode device bridge0 entered promiscuous mode device bridge0 left promiscuous mode sctp: [Deprecated]: syz-executor6 (pid 5814) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 5830) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead xt_CT: No such helper "snmp_trap" netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. xt_AUDIT: Audit type out of range (valid range: 0..2) ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. ipt_ECN: unsupported ECN operation 1f SELinux: unrecognized netlink message: protocol=6 nlmsg_type=57429 sclass=netlink_xfrm_socket pig=6588 comm=syz-executor3 ipt_ECN: unsupported ECN operation 1f SELinux: unrecognized netlink message: protocol=6 nlmsg_type=57429 sclass=netlink_xfrm_socket pig=6595 comm=syz-executor3 kauditd_printk_skb: 23 callbacks suppressed audit: type=1400 audit(1517908058.377:45): avc: denied { map } for pid=6638 comm="syz-executor7" path="socket:[16846]" dev="sockfs" ino=16846 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=tcp_socket permissive=1 sctp: [Deprecated]: syz-executor3 (pid 6655) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 6655) Use of int in maxseg socket option. Use struct sctp_assoc_value instead dccp_xmit_packet: Payload too large (65423) for featneg. dccp_close: ABORT with 65423 bytes unread syz6: Invalid MTU 6 requested, hw min 68 can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. sctp: [Deprecated]: syz-executor1 (pid 7052) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 7052) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517908059.502:46): avc: denied { net_broadcast } for pid=7084 comm="syz-executor3" capability=11 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 netlink: 'syz-executor3': attribute type 3 has an invalid length. xt_CT: You must specify a L4 protocol, and not use inversions on it. audit: type=1400 audit(1517908059.616:47): avc: denied { bind } for pid=7118 comm="syz-executor1" 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 audit: type=1400 audit(1517908059.686:48): avc: denied { getopt } for pid=7147 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_netfilter_socket permissive=1 sctp: [Deprecated]: syz-executor2 (pid 7170) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 7170) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sock: sock_set_timeout: `syz-executor5' (pid 7192) tries to set negative timeout sock: sock_set_timeout: `syz-executor5' (pid 7192) tries to set negative timeout SELinux: unrecognized netlink message: protocol=0 nlmsg_type=7936 sclass=netlink_route_socket pig=7259 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=7936 sclass=netlink_route_socket pig=7259 comm=syz-executor7 syz-executor6 (7263) used greatest stack depth: 13904 bytes left TCP: request_sock_TCPv6: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=12161 sclass=netlink_route_socket pig=7331 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=12161 sclass=netlink_route_socket pig=7353 comm=syz-executor3 device lo entered promiscuous mode audit: type=1400 audit(1517908060.356:49): avc: denied { map } for pid=7392 comm="syz-executor6" path="socket:[17494]" dev="sockfs" ino=17494 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=udp_socket permissive=1 audit: type=1400 audit(1517908060.431:50): avc: denied { accept } for pid=7435 comm="syz-executor2" 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 xt_ecn: cannot match TCP bits in rule for non-tcp packets xt_ecn: cannot match TCP bits in rule for non-tcp packets IPv4: Oversized IP packet from 127.0.0.1 audit: type=1400 audit(1517908060.807:51): avc: denied { getattr } for pid=7585 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_crypto_socket permissive=1 ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. ieee80211 phy4: Selected rate control algorithm 'minstrel_ht'