====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #314 Not tainted ------------------------------------------------------ syz-executor6/5432 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000026d52da6>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000026d52da6>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000006912b938>] 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_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_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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_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-executor6/5432: #0: (rtnl_mutex){+.+.}, at: [<000000006912b938>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5432 Comm: syz-executor6 Not tainted 4.16.0-rc1+ #314 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_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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:00007f88f58e6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f88f58e76d4 RCX: 0000000000453a59 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000090 R09: 0000000000000000 R10: 00000000204c3f70 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000518 R14: 00000000006f7ae0 R15: 0000000000000000 capability: warning: `syz-executor4' uses 32-bit capabilities (legacy support in use) Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! audit: type=1400 audit(1518793315.435:26): avc: denied { map_read map_write } for pid=5518 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=bpf permissive=1 audit: type=1400 audit(1518793315.465:27): avc: denied { prog_run } for pid=5518 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=bpf permissive=1 audit: type=1400 audit(1518793315.582:28): avc: denied { create } for pid=5547 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_netfilter_socket permissive=1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=5586 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=5599 comm=syz-executor3 QAT: Invalid ioctl QAT: failed to copy from user. QAT: Invalid ioctl QAT: failed to copy from user. audit: type=1400 audit(1518793316.093:29): avc: denied { map } for pid=5705 comm="syz-executor6" path=2F6D656D66643A49202864656C6574656429 dev="tmpfs" ino=15071 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(1518793316.183:30): avc: denied { dyntransition } for pid=5725 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0,c1 tclass=process permissive=1 audit: type=1400 audit(1518793316.197:31): avc: denied { name_bind } for pid=5739 comm="syz-executor0" src=20001 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(1518793316.197:32): avc: denied { node_bind } for pid=5739 comm="syz-executor0" saddr=172.20.0.16 src=20001 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1518793316.209:33): avc: denied { write } for pid=5740 comm="syz-executor4" path="socket:[16032]" dev="sockfs" ino=16032 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 print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write xt_physdev: using --physdev-out and --physdev-is-out are only supported in the FORWARD and POSTROUTING chains with bridged traffic. xt_physdev: using --physdev-out and --physdev-is-out are only supported in the FORWARD and POSTROUTING chains with bridged traffic. netlink: 80 bytes leftover after parsing attributes in process `syz-executor5'. rpcbind: RPC call returned error 22 netlink: 80 bytes leftover after parsing attributes in process `syz-executor5'. rpcbind: RPC call returned error 22 syz-executor2 (5954) used greatest stack depth: 15696 bytes left netlink: 48 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 48 bytes leftover after parsing attributes in process `syz-executor4'. binder: 6223:6236 ERROR: BC_REGISTER_LOOPER called without request binder: 6236 RLIMIT_NICE not set binder: 6236 RLIMIT_NICE not set binder: 6223:6249 ERROR: BC_REGISTER_LOOPER called without request binder: BINDER_SET_CONTEXT_MGR already set binder: 6249 RLIMIT_NICE not set binder: 6223:6236 ioctl 40046207 0 returned -16 binder: release 6223:6236 transaction 2 in, still active binder: send failed reply for transaction 2 to 6223:6249 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl Protocol error: SET target dimension is over the limit! kauditd_printk_skb: 11 callbacks suppressed audit: type=1326 audit(1518793319.472:45): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6456 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 binder: 6457:6469 ioctl c0306201 20006fd0 returned -14 ip6t_srh: unknown srh match flags FFFE binder: 6457:6469 ioctl c0306201 20006fd0 returned -14 audit: type=1326 audit(1518793319.551:46): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6456 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 ip6t_srh: unknown srh match flags FFFE audit: type=1400 audit(1518793319.859:47): avc: denied { net_bind_service } for pid=6585 comm="syz-executor3" capability=10 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 binder: 6664:6667 transaction failed 29189/-22, size 0-0 line 2842 audit: type=1400 audit(1518793320.097:48): avc: denied { ipc_lock } for pid=6669 comm="syz-executor2" capability=14 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 binder: 6664:6673 transaction failed 29189/-22, size 0-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 mmap: syz-executor6 (6686) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready audit: type=1400 audit(1518793321.565:49): avc: denied { create } for pid=6872 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_crypto_socket permissive=1 capability: warning: `syz-executor6' uses deprecated v2 capabilities in a way that may be insecure audit: type=1400 audit(1518793321.731:50): avc: denied { transfer } for pid=6931 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=binder permissive=1 binder: 6931:6934 DecRefs 0 refcount change on invalid ref 0 ret -22 binder_alloc: binder_alloc_mmap_handler: 6931 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 6931:6934 ioctl 40046207 0 returned -16 binder_alloc: 6931: binder_alloc_buf, no vma binder: 6931:6943 transaction failed 29189/-3, size 40-8 line 2957 binder: 6931:6934 DecRefs 0 refcount change on invalid ref 0 ret -22 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6931:6934 transaction 6 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 6, target dead Cannot find add_set index 0 as target Cannot find add_set index 0 as target binder: 7017 RLIMIT_NICE not set binder: 7017 RLIMIT_NICE not set binder: 7029 RLIMIT_NICE not set binder: 7014:7029 BC_REQUEST_DEATH_NOTIFICATION death notification already set BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 7045, name: syz-executor0 INFO: lockdep is turned off. CPU: 1 PID: 7045 Comm: syz-executor0 Not tainted 4.16.0-rc1+ #314 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 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6133 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453a59 RSP: 002b:00007fca8acecc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fca8aced6d4 RCX: 0000000000453a59 RDX: 0000000000000000 RSI: 00000000200eafc8 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020472ff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' x_tables: ip_tables: ah match: only valid for protocol 51 ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' x_tables: ip_tables: ah match: only valid for protocol 51 TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. syz-executor1 (7290) used greatest stack depth: 15568 bytes left syz-executor1 (7301) used greatest stack depth: 14816 bytes left netlink: 'syz-executor3': attribute type 1 has an invalid length. audit: type=1400 audit(1518793323.399:51): avc: denied { setuid } for pid=7334 comm="syz-executor3" capability=7 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 netlink: 'syz-executor3': attribute type 1 has an invalid length. audit: type=1400 audit(1518793323.516:52): avc: denied { map } for pid=7373 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518793323.516:53): avc: denied { net_admin } for pid=4192 comm="syz-executor0" capability=12 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(1518793323.580:54): avc: denied { net_raw } for pid=7384 comm="syz-executor2" capability=13 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 xt_l2tp: invalid flags combination: 8 xt_l2tp: invalid flags combination: 8 IPv4: Oversized IP packet from 127.0.0.1 syz-executor4 (7552): /proc/7550/oom_adj is deprecated, please use /proc/7550/oom_score_adj instead.