====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #323 Not tainted ------------------------------------------------------ syz-executor0/5499 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000002501ad29>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000002501ad29>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000e34e481c>] 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 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 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-executor0/5499: #0: (rtnl_mutex){+.+.}, at: [<00000000e34e481c>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5499 Comm: syz-executor0 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:00007f0146275c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f01462766d4 RCX: 0000000000453da9 RDX: 0000000000000030 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000020008000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 xt_connbytes: Forcing CT accounting to be enabled binder_alloc: binder_alloc_mmap_handler: 5598 20000000-20002000 already mapped failed -16 binder_alloc: 5598: binder_alloc_buf, no vma binder: BINDER_SET_CONTEXT_MGR already set binder: 5598:5613 transaction failed 29189/-3, size 0-0 line 2957 binder: 5598:5606 ioctl 40046207 0 returned -16 binder: send failed reply for transaction 2 to 5598:5606 binder: undelivered TRANSACTION_ERROR: 29189 mmap: syz-executor4 (5733) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. QAT: Invalid ioctl QAT: Invalid ioctl xt_connbytes: Forcing CT accounting to be enabled x_tables: ip6_tables: DNPT target: used from hooks PREROUTING/INPUT/FORWARD/OUTPUT/POSTROUTING, but only usable from PREROUTING/OUTPUT sctp: [Deprecated]: syz-executor7 (pid 5952) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead x_tables: ip6_tables: DNPT target: used from hooks PREROUTING/INPUT/FORWARD/OUTPUT/POSTROUTING, but only usable from PREROUTING/OUTPUT sctp: [Deprecated]: syz-executor7 (pid 5967) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl QAT: Invalid ioctl kauditd_printk_skb: 12 callbacks suppressed audit: type=1326 audit(1519300846.931:34): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6064 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453da9 code=0x0 xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero audit: type=1400 audit(1519300847.075:35): avc: denied { write } for pid=6142 comm="syz-executor6" name="net" dev="proc" ino=16881 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(1519300847.075:36): avc: denied { add_name } for pid=6142 comm="syz-executor6" 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(1519300847.076:37): avc: denied { create } for pid=6142 comm="syz-executor6" 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 audit: type=1400 audit(1519300847.743:38): avc: denied { map } for pid=6219 comm="syz-executor0" path="/dev/usbmon0" dev="devtmpfs" ino=1078 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 xt_connbytes: Forcing CT accounting to be enabled QAT: Invalid ioctl arp_tables: arptables: counters copy to user failed while replacing table QAT: Invalid ioctl arp_tables: arptables: counters copy to user failed while replacing table SELinux: failed to load policy SELinux: failed to load policy Dead loop on virtual device ip6_vti0, fix it urgently! Dead loop on virtual device ip6_vti0, fix it urgently! futex_wake_op: syz-executor2 tries to shift op by -1; fix this program futex_wake_op: syz-executor2 tries to shift op by -1; fix this program x_tables: ip6_tables: DNPT target: used from hooks PREROUTING/INPUT/OUTPUT/POSTROUTING, but only usable from PREROUTING/OUTPUT audit: type=1400 audit(1519300848.356:39): avc: denied { map } for pid=6461 comm="syz-executor4" path=2F6D656D66643A202864656C6574656429 dev="hugetlbfs" ino=18559 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor2': attribute type 1 has an invalid length. xt_l2tp: invalid flags combination: c device eql entered promiscuous mode syz-executor7 uses obsolete (PF_INET,SOCK_PACKET) mip6: mip6_rthdr_init_state: spi is not 0: 4043571200 audit: type=1400 audit(1519300849.230:40): avc: denied { prog_run } for pid=6802 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(1519300849.915:41): avc: denied { map } for pid=6901 comm="syz-executor2" path="/dev/vcs" dev="devtmpfs" ino=9008 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=1 kernel msg: ebtables bug: please report to author: counter_offset != totalcnt audit: type=1400 audit(1519300850.001:42): avc: denied { ipc_lock } for pid=6932 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 kernel msg: ebtables bug: please report to author: counter_offset != totalcnt xt_addrtype: input interface limitation not valid in POSTROUTING and OUTPUT xt_addrtype: input interface limitation not valid in POSTROUTING and OUTPUT x_tables: ip_tables: ah match: only valid for protocol 51 audit: type=1400 audit(1519300850.396:43): avc: denied { name_bind } for pid=7064 comm="syz-executor0" src=20003 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 dccp_xmit_packet: Payload too large (65423) for featneg. kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns encrypted_key: master key parameter 'uxaÌwX('q T f2GN̕DfEE k$%7dǴT*X3'W,T}XM!Zc զ܊ h՜ i,ipO%[X;l3LBP"XbO' is invalid encrypted_key: master key parameter 'uxaÌwX('q T f2GN̕DfEE k$%7dǴT*X3'W,T}XM!Zc զ܊ h՜ i,ipO%[X;l3LBP"XbO' is invalid QAT: Invalid ioctl QAT: Invalid ioctl xt_l2tp: missing protocol rule (udp|l2tpip) kernel msg: ebtables bug: please report to author: Wrong len argument kernel msg: ebtables bug: please report to author: Wrong len argument kauditd_printk_skb: 5 callbacks suppressed audit: type=1400 audit(1519300854.310:49): avc: denied { map } for pid=7443 comm="syz-executor6" path="/dev/sg0" dev="devtmpfs" ino=9168 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 xt_connbytes: Forcing CT accounting to be enabled netlink: 'syz-executor4': attribute type 6 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 'syz-executor4': attribute type 6 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'.