====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #325 Not tainted ------------------------------------------------------ syz-executor2/6643 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000001591ea40>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000001591ea40>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000001751e515>] 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+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 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 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_arpt_get_ctl+0x2a9/0xa00 net/ipv4/netfilter/arp_tables.c:1481 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 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 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-executor2/6643: #0: (rtnl_mutex){+.+.}, at: [<000000001751e515>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 6643 Comm: syz-executor2 Not tainted 4.16.0-rc2+ #325 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+0x194/0x24d 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 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 RIP: 0033:0x453de9 RSP: 002b:00007feb43947c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007feb439486d4 RCX: 0000000000453de9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020000080 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 xt_connbytes: Forcing CT accounting to be enabled SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=6760 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=6760 comm=syz-executor1 device syz5 entered promiscuous mode device syz5 left promiscuous mode device syz5 entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl net_ratelimit: 9 callbacks suppressed ip_tables: error: `Þða®ÅÒ1¸”æ ŒÕYâC!Ïs\Òa®Ž¿ñœ' ip_tables: error: `Þða®ÅÒ1¸”æ ŒÕYâC!Ïs\Òa®Ž¿ñœ' device eql entered promiscuous mode xt_HL: TTL: invalid or unknown mode 3 xt_connbytes: Forcing CT accounting to be enabled syz-executor1 (7489) used greatest stack depth: 15504 bytes left QAT: Invalid ioctl kauditd_printk_skb: 26 callbacks suppressed audit: type=1400 audit(1519397112.239:48): avc: denied { map } for pid=7544 comm="syz-executor1" path="/selinux/status" dev="selinuxfs" ino=19 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl PPPIOCDETACH file->f_count=2 device lo entered promiscuous mode netlink: 4612 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=7697 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=7697 comm=syz-executor7 device lo left promiscuous mode syz-executor5 (7782): /proc/7777/oom_adj is deprecated, please use /proc/7777/oom_score_adj instead. netlink: 'syz-executor6': attribute type 1 has an invalid length. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=29 sclass=netlink_tcpdiag_socket pig=8008 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=29 sclass=netlink_tcpdiag_socket pig=8008 comm=syz-executor7 kvm [8014]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x4000006c data 0x0 kvm [8014]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x4000006c data 0x0 xt_connbytes: Forcing CT accounting to be enabled ipt_ECN: new ECT codepoint 80 out of mask ipt_ECN: new ECT codepoint 80 out of mask QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl ipt_CLUSTERIP: Please specify destination IP ipt_rpfilter: match only valid in the 'raw' or 'mangle' tables, not ''. audit: type=1400 audit(1519397114.801:49): avc: denied { create } for pid=8345 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=key permissive=1 xt_connbytes: Forcing CT accounting to be enabled rfkill: input handler disabled rfkill: input handler enabled netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor2': attribute type 1 has an invalid length. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=35 sclass=netlink_audit_socket pig=8547 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=35 sclass=netlink_audit_socket pig=8549 comm=syz-executor2 binder: 8757 RLIMIT_NICE not set binder: 8750:8773 unknown command 0 binder: 8750:8773 ioctl c0306201 20008fd0 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 8773 RLIMIT_NICE not set binder: 8750:8757 ioctl 40046207 0 returned -16 kernel msg: ebtables bug: please report to author: bad policy kernel msg: ebtables bug: please report to author: bad policy QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1519397117.637:50): avc: denied { map } for pid=9302 comm="syz-executor5" path="/dev/sg0" dev="devtmpfs" ino=9469 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:scsi_generic_device_t:s0 tclass=chr_file permissive=1 syz-executor2 (9389) used greatest stack depth: 14480 bytes left ebt_limit: overflow, try lower: 0/0 ebt_limit: overflow, try lower: 0/0 netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'. mmap: syz-executor1 (9435) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. xt_hashlimit: overflow, try lower: 0/0 xt_hashlimit: overflow, try lower: 0/0 audit: type=1400 audit(1519397118.888:51): avc: denied { relabelto } for pid=9681 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sulogin_exec_t:s0 tclass=packet permissive=1 xt_SECMARK: mode already set to 1 cannot mix with rules for mode 0 audit: type=1400 audit(1519397118.940:52): avc: denied { validate_trans } for pid=9682 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=security permissive=1 xt_SECMARK: mode already set to 1 cannot mix with rules for mode 0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54 sclass=netlink_route_socket pig=9724 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54 sclass=netlink_route_socket pig=9730 comm=syz-executor5