netlink: 'syz-executor3': attribute type 21 has an invalid length. ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #314 Not tainted ------------------------------------------------------ syz-executor4/5640 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000009eb4beaa>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000009eb4beaa>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000002ab9c6cb>] 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 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 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-executor4/5640: #0: (rtnl_mutex){+.+.}, at: [<000000002ab9c6cb>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5640 Comm: syz-executor4 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 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 RIP: 0033:0x453a59 RSP: 002b:00007fd665dfec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fd665dff6d4 RCX: 0000000000453a59 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000015 RBP: 000000000071bea0 R08: 0000000000000090 R09: 0000000000000000 R10: 000000002009ff70 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000518 R14: 00000000006f7ae0 R15: 0000000000000000 netlink: 'syz-executor3': attribute type 21 has an invalid length. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready QAT: Invalid ioctl QAT: Invalid ioctl x_tables: ip_tables: conntrack.1 match: invalid size 152 (kernel) != (user) 160 x_tables: ip_tables: conntrack.1 match: invalid size 152 (kernel) != (user) 160 capability: warning: `syz-executor1' uses 32-bit capabilities (legacy support in use) openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) mmap: syz-executor2 (6084) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. openvswitch: netlink: Flow get message rejected, Key attribute missing. openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) openvswitch: netlink: Flow get message rejected, Key attribute missing. RDS: rds_bind could not find a transport for 0.0.0.1, load rds_tcp or rds_rdma? 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 PPPIOCDETACH file->f_count=2 xt_connbytes: Forcing CT accounting to be enabled netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. QAT: Invalid ioctl netlink: 'syz-executor1': attribute type 21 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 21 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. x_tables: ip6_tables: rpfilter match: used from hooks PREROUTING/FORWARD, but only valid from PREROUTING x_tables: ip6_tables: rpfilter match: used from hooks PREROUTING/FORWARD, but only valid from PREROUTING sg_write: data in/out 524252/24 bytes for SCSI command 0x0-- guessing data in; program syz-executor3 not setting count and/or reply_len properly SELinux: unknown mount option SELinux: unknown mount option sg_write: data in/out 524252/24 bytes for SCSI command 0x0-- guessing data in; program syz-executor3 not setting count and/or reply_len properly syz4: Invalid MTU 4 requested, hw min 68 syz4: Invalid MTU 4 requested, hw min 68 kauditd_printk_skb: 9 callbacks suppressed audit: type=1400 audit(1518790212.694:37): avc: denied { map } for pid=6646 comm="syz-executor5" path="/dev/binder0" dev="devtmpfs" ino=1153 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1 binder: BINDER_SET_CONTEXT_MGR already set audit: type=1400 audit(1518790212.700:38): avc: denied { call } for pid=6646 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=binder permissive=1 binder: 6646:6658 ioctl 40046207 0 returned -16 binder_alloc: 6646: binder_alloc_buf, no vma binder: 6646:6649 transaction failed 29189/-3, size 80-16 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6646:6649 transaction 7 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 7, target dead audit: type=1400 audit(1518790212.897:39): avc: denied { map } for pid=6684 comm="syz-executor2" path=2F6D656D66643A706F73FB202864656C6574656429 dev="tmpfs" ino=17185 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 device eql entered promiscuous mode xt_connbytes: Forcing CT accounting to be enabled device eql entered promiscuous mode syz-executor1 uses obsolete (PF_INET,SOCK_PACKET) autofs4:pid:6911:validate_dev_ioctl: invalid path supplied for cmd(0x0000937e) autofs4:pid:6911:validate_dev_ioctl: invalid path supplied for cmd(0x0000937e) ptrace attach of "/root/syz-executor2"[4234] was attempted by "/root/syz-executor2"[6912] ptrace attach of "/root/syz-executor2"[4234] was attempted by "/root/syz-executor2"[6886] binder: BINDER_SET_CONTEXT_MGR already set binder: 6926:6948 ioctl 40046207 0 returned -16 binder_alloc: 6926: binder_alloc_buf, no vma binder: 6926:6938 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6926:6938 transaction 10 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 10, target dead SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6995 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7013 comm=syz-executor6 audit: type=1400 audit(1518790214.433:40): avc: denied { accept } for pid=7099 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_netfilter_socket permissive=1 rfkill: input handler disabled mip6: mip6_rthdr_init_state: state's mode is not 2: 0 rfkill: input handler enabled encrypted_key: master key parameter '' is invalid encrypted_key: master key parameter '' is invalid netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 'syz-executor2': attribute type 21 has an invalid length. netlink: 'syz-executor2': attribute type 21 has an invalid length. Bearer <> rejected, not supported in standalone mode Bearer <> rejected, not supported in standalone mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'. audit: type=1400 audit(1518790215.893:41): avc: denied { setuid } for pid=7541 comm="syz-executor1" 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 RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? audit: type=1400 audit(1518790217.094:42): avc: denied { net_admin } for pid=4224 comm="syz-executor7" 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(1518790217.153:43): avc: denied { net_admin } for pid=5677 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(1518790217.281:44): avc: denied { map_create } for pid=7892 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=bpf permissive=1 audit: type=1400 audit(1518790217.281:45): avc: denied { map_read map_write } for pid=7892 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=bpf permissive=1 audit: type=1400 audit(1518790217.329:46): avc: denied { map } for pid=7903 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 binder_alloc: 7990: binder_alloc_buf, no vma binder: 7990:7992 transaction failed 29189/-3, size 0-0 line 2957 binder: BINDER_SET_CONTEXT_MGR already set binder: 7990:7992 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 kauditd_printk_skb: 14 callbacks suppressed audit: type=1400 audit(1518790217.749:61): avc: denied { map } for pid=8039 comm="syz-executor2" path=2F6D656D66643A2F7B06202864656C6574656429 dev="tmpfs" ino=21726 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(1518790217.956:62): avc: denied { map } for pid=8072 comm="syz-executor4" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=21773 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 netlink: 460 bytes leftover after parsing attributes in process `syz-executor1'. audit: type=1400 audit(1518790218.126:63): avc: denied { create } for pid=8114 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 3 has an invalid length. audit: type=1400 audit(1518790218.128:64): avc: denied { ioctl } for pid=8114 comm="syz-executor3" path="socket:[21809]" dev="sockfs" ino=21809 ioctlcmd=0x6409 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(1518790218.130:65): avc: denied { write } for pid=8114 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 3 has an invalid length. irq bypass consumer (token 000000006968b399) registration fails: -16 irq bypass consumer (token 0000000063567292) registration fails: -16 audit: type=1400 audit(1518790218.259:66): avc: denied { name_bind } for pid=8133 comm="syz-executor1" src=20004 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(1518790218.260:67): avc: denied { node_bind } for pid=8133 comm="syz-executor1" saddr=::1 src=20004 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1