====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc9+ #218 Not tainted ------------------------------------------------------ syz-executor1/5332 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000005ea6c75d>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000005ea6c75d>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000006ed1a504>] 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: -> #1 (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 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 tee_tg_check+0x1a0/0x280 net/netfilter/xt_TEE.c:106 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:518 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:559 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:730 do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1680 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4141 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor1/5332: #0: (rtnl_mutex){+.+.}, at: [<000000006ed1a504>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5332 Comm: syz-executor1 Not tainted 4.15.0-rc9+ #218 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.37+0x2cd/0x2dc kernel/locking/lockdep.c:1218 check_prev_add kernel/locking/lockdep.c:1858 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f58a2508c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000000051c R08: 0000000020745000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000006f6b40 R13: 00000000ffffffff R14: 00007f58a25096d4 R15: 0000000000000000 netlink: 40 bytes leftover after parsing attributes in process `syz-executor3'. sctp: [Deprecated]: syz-executor7 (pid 5357) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517461382.395:18): avc: denied { create } for pid=5363 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(1517461382.397:19): avc: denied { map_read map_write } for pid=5365 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=bpf permissive=1 audit: type=1400 audit(1517461382.532:20): avc: denied { prog_load } for pid=5404 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=bpf permissive=1 audit: type=1400 audit(1517461382.592:21): avc: denied { prog_run } for pid=5404 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=bpf permissive=1 ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' 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. sock: sock_set_timeout: `syz-executor2' (pid 5610) tries to set negative timeout sock: sock_set_timeout: `syz-executor2' (pid 5610) tries to set negative timeout IPv4: Oversized IP packet from 127.0.0.1 device syz5 entered promiscuous mode dccp_invalid_packet: P.Data Offset(0) too small syz-executor7 uses obsolete (PF_INET,SOCK_PACKET) netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor5': attribute type 6 has an invalid length. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor5': attribute type 6 has an invalid length. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. RDS: rds_bind could not find a transport for 0.0.0.8, load rds_tcp or rds_rdma? netlink: 40 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor7'. kauditd_printk_skb: 5 callbacks suppressed audit: type=1400 audit(1517461390.630:27): avc: denied { setopt } for pid=6092 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_generic_socket permissive=1 audit: type=1400 audit(1517461390.656:28): avc: denied { getattr } for pid=6092 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_generic_socket permissive=1 netlink: 'syz-executor3': attribute type 18 has an invalid length. netlink: 'syz-executor3': attribute type 18 has an invalid length. sctp: [Deprecated]: syz-executor3 (pid 6225) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 6225) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead syz-executor7 (6278) used greatest stack depth: 15840 bytes left audit: type=1400 audit(1517461391.580:29): avc: denied { getattr } for pid=6480 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_crypto_socket permissive=1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=26 sclass=netlink_audit_socket pig=6492 comm=syz-executor5 netlink: 'syz-executor0': attribute type 11 has an invalid length. netlink: 'syz-executor0': attribute type 11 has an invalid length. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=26 sclass=netlink_audit_socket pig=6510 comm=syz-executor5