====================================================== WARNING: possible circular locking dependency detected QAT: Invalid ioctl 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor2/5345 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<000000001b0d0b2d>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<000000001b0d0b2d>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000f7485bfa>] 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 kauditd_printk_skb: 1 callbacks suppressed audit: type=1400 audit(1518824144.991:20): avc: denied { prog_load } for pid=5358 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 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 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673 __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108 do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline] do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #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:1046 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1093 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_ip6t_get_ctl+0x159/0xaf0 net/ipv6/netfilter/ip6_tables.c:1710 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1df/0x2e0 net/ipv6/ipv6_sockglue.c:1371 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (sk_lock-AF_INET6){+.+.}: 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_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x130 net/ipv6/ipv6_sockglue.c:922 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: sk_lock-AF_INET6 --> &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_INET6); *** DEADLOCK *** 1 lock held by syz-executor2/5345: #0: (rtnl_mutex){+.+.}, at: [<00000000f7485bfa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5345 Comm: syz-executor2 Not tainted 4.16.0-rc1+ #315 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_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x130 net/ipv6/ipv6_sockglue.c:922 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453a59 RSP: 002b:00007f68415bdc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f68415be6d4 RCX: 0000000000453a59 RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000020 R09: 0000000000000000 R10: 0000000020f57fe0 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004f7 R14: 00000000006f77c8 R15: 0000000000000000 audit: type=1400 audit(1518824145.942:21): avc: denied { map } for pid=5420 comm="syz-executor3" path="/dev/ashmem" dev="devtmpfs" ino=9127 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. audit: type=1400 audit(1518824145.944:22): avc: denied { create } for pid=5426 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_netfilter_socket permissive=1 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. audit: type=1400 audit(1518824145.945:23): avc: denied { write } for pid=5426 comm="syz-executor1" path="socket:[14777]" dev="sockfs" ino=14777 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1025 sclass=netlink_route_socket pig=5444 comm=syz-executor1 syz6: Invalid MTU 65536 requested, hw max 65521 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. syz6: Invalid MTU 65536 requested, hw max 65521 audit: type=1400 audit(1518824146.204:24): avc: denied { map_create } for pid=5471 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=bpf permissive=1 audit: type=1400 audit(1518824146.207:25): avc: denied { ipc_owner } for pid=5469 comm="syz-executor7" capability=15 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 audit: type=1400 audit(1518824146.467:26): avc: denied { map } for pid=5532 comm="syz-executor0" path="/proc/165/net/pfkey" dev="proc" ino=4026533189 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:proc_net_t:s0 tclass=file permissive=1 PPPIOCDETACH file->f_count=2 audit: type=1400 audit(1518824146.499:27): avc: denied { name_connect } for pid=5527 comm="syz-executor4" dest=20016 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 PPPIOCDETACH file->f_count=2 audit: type=1400 audit(1518824146.601:28): avc: denied { name_bind } for pid=5572 comm="syz-executor4" src=20019 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1518824146.601:29): avc: denied { node_bind } for pid=5572 comm="syz-executor4" src=20019 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready syz-executor2 uses obsolete (PF_INET,SOCK_PACKET) binder: 5750:5760 tried to acquire reference to desc 0, got 1 instead binder: BINDER_SET_CONTEXT_MGR already set binder: 5750:5778 ioctl 40046207 0 returned -16 binder: 5750:5778 tried to acquire reference to desc 0, got 1 instead binder: BINDER_SET_CONTEXT_MGR already set binder: 5750:5760 ioctl 40046207 0 returned -16 netlink: 28 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor2'. Option ' Ï' to dns_resolver key: bad/missing value Option ' Ï' to dns_resolver key: bad/missing value QAT: Invalid ioctl tmpfs: No value for mount option ',4' netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. QAT: Invalid ioctl tmpfs: No value for mount option ',4' netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. ipt_ECN: new ECT codepoint 9 out of mask ipt_ECN: new ECT codepoint 9 out of mask sctp: [Deprecated]: syz-executor0 (pid 6096) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl binder: 6094:6101 BC_FREE_BUFFER u0000000000000000 no match QAT: Invalid ioctl binder: 6094:6101 BC_INCREFS_DONE uffffffffffffffff no match binder: 6094:6101 unknown command 0 QAT: Invalid ioctl binder: 6094:6101 ioctl c0306201 20009fd0 returned -22 sctp: [Deprecated]: syz-executor0 (pid 6096) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl binder: 6094:6101 BC_FREE_BUFFER u0000000000000000 no match binder: 6094:6101 BC_INCREFS_DONE uffffffffffffffff no match binder: 6094:6101 unknown command 0 binder: 6094:6101 ioctl c0306201 20009fd0 returned -22 QAT: Invalid ioctl QAT: Invalid ioctl ipt_CLUSTERIP: unknown mode 3 QAT: Invalid ioctl ipt_CLUSTERIP: unknown mode 3 openvswitch: netlink: Key 0 has unexpected len 3 expected 0 openvswitch: netlink: Key 0 has unexpected len 3 expected 0