ip6t_REJECT: TCP_RESET illegal for non-tcp ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #323 Not tainted ------------------------------------------------------ syz-executor5/5371 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000008f42d9d1>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000008f42d9d1>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000a7f4e042>] 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 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1422 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-executor5/5371: #0: (rtnl_mutex){+.+.}, at: [<00000000a7f4e042>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5371 Comm: syz-executor5 Not tainted 4.16.0-rc2+ #323 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_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: 0033:0x453da9 RSP: 002b:00007f79060e3c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f79060e46d4 RCX: 0000000000453da9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020e58000 R09: 0000000000000000 R10: 0000000020008000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 ip6t_REJECT: TCP_RESET illegal for non-tcp xt_connbytes: Forcing CT accounting to be enabled xt_CONNSECMARK: invalid mode: 0 xt_CONNSECMARK: invalid mode: 0 binder_alloc: binder_alloc_mmap_handler: 5544 20000000-20002000 already mapped failed -16 netlink: 'syz-executor4': attribute type 33 has an invalid length. netlink: 'syz-executor4': attribute type 33 has an invalid length. SELinux: policydb magic number 0xeb19f9af does not match expected magic number 0xf97cff8c SELinux: failed to load policy SELinux: policydb magic number 0xeb19f9af does not match expected magic number 0xf97cff8c SELinux: failed to load policy IPv4: Oversized IP packet from 127.0.0.1 rdma_op 0000000097dc50c1 conn xmit_rdma (null) IPv4: Oversized IP packet from 127.0.0.1 rdma_op 0000000041e1d662 conn xmit_rdma (null) Cannot find add_set index 62 as target x_tables: ip6_tables: REJECT target: only valid in filter table, not  netlink: 'syz-executor7': attribute type 4 has an invalid length. netlink: 'syz-executor7': attribute type 4 has an invalid length. SELinux: failed to load policy SELinux: failed to load policy dccp_xmit_packet: Payload too large (65423) for featneg. syz-executor3 (6080) used greatest stack depth: 16000 bytes left device eql entered promiscuous mode xt_connbytes: Forcing CT accounting to be enabled binder: BINDER_SET_CONTEXT_MGR already set binder: 6163:6181 ioctl 40046207 0 returned -16 binder_alloc: 6163: binder_alloc_buf, no vma binder: 6163:6169 transaction failed 29189/-3, size 80-8 line 2957 binder: release 6163:6169 transaction 6 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 6, target dead atomic_op 00000000f92a827a conn xmit_atomic (null) rfkill: input handler disabled atomic_op 00000000a777fdf3 conn xmit_atomic (null) rfkill: input handler enabled device eql entered promiscuous mode device eql entered promiscuous mode kauditd_printk_skb: 18 callbacks suppressed audit: type=1400 audit(1519213249.044:40): avc: denied { bind } for pid=6330 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_generic_socket permissive=1 audit: type=1400 audit(1519213249.137:41): avc: denied { create } for pid=6352 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1 audit: type=1400 audit(1519213249.139:42): avc: denied { write } for pid=6352 comm="syz-executor3" path="socket:[17080]" dev="sockfs" ino=17080 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1 audit: type=1400 audit(1519213249.196:43): avc: denied { map } for pid=6366 comm="syz-executor5" path="/dev/usbmon0" dev="devtmpfs" ino=110 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 audit: type=1400 audit(1519213249.287:44): avc: denied { read } for pid=6407 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 audit: type=1400 audit(1519213249.293:45): avc: denied { read } for pid=6412 comm="syz-executor2" path="socket:[17167]" dev="sockfs" ino=17167 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 device eql entered promiscuous mode netlink: 'syz-executor0': attribute type 4 has an invalid length. x_tables: ip6_tables: TCPMSS target: only valid for protocol 6 audit: type=1400 audit(1519213249.646:46): avc: denied { prog_run } for pid=6473 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=bpf permissive=1 netlink: 'syz-executor0': attribute type 4 has an invalid length. x_tables: ip_tables: osf match: used from hooks OUTPUT, but only valid from PREROUTING/INPUT/FORWARD audit: type=1400 audit(1519213249.866:47): avc: denied { map } for pid=6551 comm="syz-executor3" path="/47/file0" dev="tmpfs" ino=17403 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 xt_connbytes: Forcing CT accounting to be enabled ipt_REJECT: TCP_RESET invalid for non-tcp x_tables: ip_tables: REJECT target: only valid in filter table, not /selinux/avc/hash_stats mmap: syz-executor1 (6627) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. audit: type=1400 audit(1519213250.203:48): avc: denied { fsetid } for pid=6669 comm="syz-executor0" capability=4 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(1519213250.297:49): avc: denied { create } for pid=6698 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_fib_lookup_socket permissive=1 netlink: 'syz-executor1': attribute type 41 has an invalid length. netlink: 'syz-executor1': attribute type 41 has an invalid length. sock: sock_set_timeout: `syz-executor6' (pid 6816) tries to set negative timeout sock: sock_set_timeout: `syz-executor6' (pid 6822) tries to set negative timeout syz-executor1 uses obsolete (PF_INET,SOCK_PACKET) xt_hashlimit: hashlimit invalid interval devpts: called with bogus options binder_alloc: 7093: binder_alloc_buf, no vma binder: 7093:7097 transaction failed 29189/-3, size 0-0 line 2957 binder: BINDER_SET_CONTEXT_MGR already set binder: 7093:7097 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 openvswitch: netlink: Message has 1 unknown bytes. netlink: 180 bytes leftover after parsing attributes in process `syz-executor3'. CUSE: info not properly terminated SELinux: policydb magic number 0xeb19f9af does not match expected magic number 0xf97cff8c SELinux: failed to load policy SELinux: policydb magic number 0xeb19f9af does not match expected magic number 0xf97cff8c SELinux: failed to load policy binder: 7609:7613 ioctl c0306201 20008000 returned -14 encrypted_key: insufficient parameters specified QAT: Invalid ioctl QAT: Invalid ioctl kauditd_printk_skb: 16 callbacks suppressed audit: type=1400 audit(1519213254.292:66): avc: denied { getopt } for pid=7872 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=netlink_crypto_socket permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1519213254.336:67): avc: denied { write } for pid=7896 comm="syz-executor4" name="net" dev="proc" ino=22034 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(1519213254.336:68): avc: denied { add_name } for pid=7896 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(1519213254.337:69): avc: denied { create } for pid=7896 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 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl TCP: request_sock_TCPv6: Possible SYN flooding on port 20022. Sending cookies. Check SNMP counters. ipt_CLUSTERIP: no config found for 255.255.255.255, need 'new' binder: BINDER_SET_CONTEXT_MGR already set binder: 8028:8034 ioctl 40046207 0 returned -16 ipt_CLUSTERIP: no config found for 255.255.255.255, need 'new' binder: BINDER_SET_CONTEXT_MGR already set binder: 8028:8038 ioctl 40046207 0 returned -16 binder_alloc: 8028: binder_alloc_buf, no vma binder: 8028:8034 transaction failed 29189/-3, size 40-8 line 2957 binder: BINDER_SET_CONTEXT_MGR already set binder: 8028:8039 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 8028:8034 transaction 13 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 13, target dead