====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #324 Not tainted ------------------------------------------------------ syz-executor2/5838 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000004fdcd891>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000004fdcd891>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000007451b9af>] 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 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 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 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 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-executor2/5838: #0: (rtnl_mutex){+.+.}, at: [<000000007451b9af>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5838 Comm: syz-executor2 Not tainted 4.16.0-rc2+ #324 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 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 RIP: 0033:0x453de9 RSP: 002b:00007f3c94a08c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f3c94a096d4 RCX: 0000000000453de9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bf58 R08: 0000000020a5b000 R09: 0000000000000000 R10: 0000000020296000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f7 R14: 00000000006f17c8 R15: 0000000000000001 xt_connbytes: Forcing CT accounting to be enabled SELinux: failed to load policy capability: warning: `syz-executor3' uses 32-bit capabilities (legacy support in use) capability: warning: `syz-executor0' uses deprecated v2 capabilities in a way that may be insecure netlink: 'syz-executor7': attribute type 3 has an invalid length. netlink: 'syz-executor7': attribute type 3 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. binder: 6522:6525 unknown command 1074032098 binder: 6522:6525 ioctl c0306201 20000100 returned -22 binder: 6522:6525 unknown command 1074032098 binder: 6522:6525 ioctl c0306201 20000100 returned -22 device eql entered promiscuous mode netlink: 'syz-executor1': attribute type 4 has an invalid length. syz-executor6 (6587): /proc/6587/oom_adj is deprecated, please use /proc/6587/oom_score_adj instead. bpf: check failed: parse error binder: 6627:6637 got transaction with too large buffer binder: 6627:6637 transaction failed 29201/-22, size 72-8 line 3116 binder_alloc: binder_alloc_mmap_handler: 6627 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 6627: binder_alloc_buf, no vma binder: 6627:6637 ioctl 40046207 0 returned -16 binder: 6627:6659 transaction failed 29189/-3, size 72-8 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 device syz7 entered promiscuous mode device syz7 left promiscuous mode xt_DSCP: dscp fc out of range xt_DSCP: dscp fc out of range netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. kauditd_printk_skb: 23 callbacks suppressed audit: type=1400 audit(1519358017.589:45): avc: denied { map } for pid=6900 comm="syz-executor5" path="socket:[19465]" dev="sockfs" ino=19465 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=rawip_socket permissive=1 audit: type=1400 audit(1519358017.626:46): avc: denied { map } for pid=6904 comm="syz-executor6" path=2F6D656D66643A202864656C6574656429 dev="tmpfs" ino=18657 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 audit: type=1400 audit(1519358017.702:47): avc: denied { name_bind } for pid=6948 comm="syz-executor7" src=20028 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(1519358017.874:48): avc: denied { write } for pid=6993 comm="syz-executor2" name="net" dev="proc" ino=19603 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(1519358017.874:49): avc: denied { add_name } for pid=6993 comm="syz-executor2" 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(1519358017.874:50): avc: denied { create } for pid=6993 comm="syz-executor2" 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 mmap: syz-executor6 (7063) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. x_tables: ip6_tables: icmp6 match: only valid for protocol 58 audit: type=1400 audit(1519358018.081:51): avc: denied { create } for pid=7059 comm="syz-executor4" 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 device eql entered promiscuous mode rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. net_ratelimit: 10 callbacks suppressed arp_tables: arptables: counters copy to user failed while replacing table l2tp_core: tunl 2: fd 20 wrong protocol, got 6, expected 17 TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. irq bypass consumer (token 00000000119e8d76) registration fails: -16 arp_tables: arptables: counters copy to user failed while replacing table l2tp_core: tunl 2: fd 24 wrong protocol, got 6, expected 17 xt_connbytes: Forcing CT accounting to be enabled device syz6 entered promiscuous mode Cannot find add_set index 0 as target netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. Cannot find add_set index 0 as target device eql entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=64 sclass=netlink_route_socket pig=7276 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=64 sclass=netlink_route_socket pig=7276 comm=syz-executor7 audit: type=1400 audit(1519358018.876:52): avc: denied { bind } for pid=7308 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 audit: type=1400 audit(1519358018.879:53): avc: denied { getopt } for pid=7308 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 IPVS: set_ctl: invalid protocol: 13703 39.52.93.236:60696 Ɓtpm`x/.HݼބDBC+ IPVS: set_ctl: invalid protocol: 13703 39.52.93.236:60696 Ɓtpm`x/.HݼބDBC+ SELinux: unrecognized netlink message: protocol=9 nlmsg_type=17 sclass=netlink_audit_socket pig=7464 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=17 sclass=netlink_audit_socket pig=7486 comm=syz-executor1 xt_connbytes: Forcing CT accounting to be enabled ipt_REJECT: TCP_RESET invalid for non-tcp ipt_REJECT: TCP_RESET invalid for non-tcp xt_connbytes: Forcing CT accounting to be enabled audit: type=1400 audit(1519358019.790:54): avc: denied { setopt } for pid=7589 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 xt_connbytes: Forcing CT accounting to be enabled PPPIOCDETACH file->f_count=2 syz-executor5 (7764) used greatest stack depth: 15248 bytes left ALSA: seq fatal error: cannot create timer (-16) ALSA: seq fatal error: cannot create timer (-16) QAT: Invalid ioctl QAT: Invalid ioctl