binder: 5469 RLIMIT_NICE not set audit: type=1400 audit(1518834714.265:26): avc: denied { setopt } for pid=5466 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 ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor1/5476 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<0000000082e46e21>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<0000000082e46e21>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000b60e0037>] 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 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123 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 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 ipv6_setsockopt+0xa0/0x130 net/ipv6/ipv6_sockglue.c:917 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-executor1/5476: #0: (rtnl_mutex){+.+.}, at: [<00000000b60e0037>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5476 Comm: syz-executor1 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:00007f7e0e70bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f7e0e70c6d4 RCX: 0000000000453a59 RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000014 R09: 0000000000000000 R10: 0000000020670fec R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000509 R14: 00000000006f7978 R15: 0000000000000000 binder: 5469 RLIMIT_NICE not set mmap: syz-executor0 (5484) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. binder: undelivered death notification, 0000000000000000 audit: type=1400 audit(1518834715.030:27): avc: denied { getopt } for pid=5466 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 netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length. ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length. capability: warning: `syz-executor3' uses 32-bit capabilities (legacy support in use) do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app device eql entered promiscuous mode ion_ioctl: ioctl validate failed syz-executor6 (5836) used greatest stack depth: 13520 bytes left device eql entered promiscuous mode xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables sctp: [Deprecated]: syz-executor4 (pid 6074) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 6078) Use of int in maxseg socket option. Use struct sctp_assoc_value instead openvswitch: netlink: Message has 8 unknown bytes. openvswitch: netlink: Message has 8 unknown bytes. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=6250 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=6265 comm=syz-executor0 QAT: Invalid ioctl QAT: Invalid ioctl x86/PAT: syz-executor7:6320 map pfn RAM range req write-combining for [mem 0x1cf780000-0x1cf781fff], got write-back QAT: Invalid ioctl QAT: Invalid ioctl x86/PAT: syz-executor7:6320 map pfn RAM range req write-combining for [mem 0x1d3ce0000-0x1d3ce1fff], got write-back kauditd_printk_skb: 13 callbacks suppressed audit: type=1400 audit(1518834718.749:41): avc: denied { read } for pid=6631 comm="syz-executor6" 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 PPPIOCDETACH file->f_count=2 PPPIOCDETACH file->f_count=2 audit: type=1326 audit(1518834719.165:42): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6738 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 audit: type=1326 audit(1518834719.191:43): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6738 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 audit: type=1400 audit(1518834719.265:44): avc: denied { read } for pid=6753 comm="syz-executor6" path="socket:[18676]" dev="sockfs" ino=18676 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 rfkill: input handler disabled rfkill: input handler enabled Dead loop on virtual device ip6_vti0, fix it urgently! binder: 6936:6938 ioctl 4008af12 201f4000 returned -22 binder: 6936:6938 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 6936:6938 ERROR: BC_REGISTER_LOOPER called without request binder: 6936:6938 BC_ACQUIRE_DONE u0000000000000000 no match binder: 6936:6938 Release 1 refcount change on invalid ref 4 ret -22 binder: 6936:6938 unknown command 0 binder: 6936:6938 ioctl c0306201 20b09000 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 6936:6954 ioctl 40046207 0 returned -16 binder: 6936:6954 ioctl 4008af12 201f4000 returned -22 audit: type=1400 audit(1518834719.873:45): avc: denied { create } for pid=6944 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_scsitransport_socket permissive=1 binder: 6936:6957 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 6936:6957 ERROR: BC_REGISTER_LOOPER called without request binder: 6936:6957 BC_ACQUIRE_DONE u0000000000000000 no match binder: 6936:6957 Release 1 refcount change on invalid ref 4 ret -22 binder: 6936:6957 unknown command 0 binder: 6936:6957 ioctl c0306201 20b09000 returned -22 audit: type=1326 audit(1518834720.117:46): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7025 comm="syz-executor0" exe="/root/syz-executor0" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 audit: type=1400 audit(1518834720.148:47): avc: denied { write } for pid=7020 comm="syz-executor4" name="net" dev="proc" ino=18952 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518834720.148:48): avc: denied { add_name } for pid=7020 comm="syz-executor4" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518834720.149:49): avc: denied { create } for pid=7020 comm="syz-executor4" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:insmod_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518834720.302:50): avc: denied { ioctl } for pid=7049 comm="syz-executor2" path="socket:[18414]" dev="sockfs" ino=18414 ioctlcmd=0x8934 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: 'syz-executor3': attribute type 3 has an invalid length. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl PPPIOCDETACH file->f_count=2 syz-executor7 uses obsolete (PF_INET,SOCK_PACKET) bpf: check failed: parse error bpf: check failed: parse error netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. rfkill: input handler disabled netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. rfkill: input handler enabled bridge: RTM_NEWNEIGH with invalid state 0x0 bridge: RTM_NEWNEIGH with invalid state 0x0 xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_CT: You must specify a L4 protocol, and not use inversions on it. capability: warning: `syz-executor7' uses deprecated v2 capabilities in a way that may be insecure xt_connbytes: Forcing CT accounting to be enabled do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app ptrace attach of "/root/syz-executor3"[4217] was attempted by "/root/syz-executor3"[8146] ptrace attach of "/root/syz-executor3"[4217] was attempted by "/root/syz-executor3"[8130] QAT: Stopping all acceleration devices. xt_cgroup: both path and classid specified QAT: Stopping all acceleration devices. xt_cgroup: both path and classid specified rfkill: input handler disabled rfkill: input handler enabled