====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #326 Not tainted ------------------------------------------------------ syz-executor7/6194 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<00000000c487dc4f>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000c487dc4f>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000860fc55d>] 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:2406 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 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 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-executor7/6194: #0: (rtnl_mutex){+.+.}, at: [<00000000860fc55d>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 6194 Comm: syz-executor7 Not tainted 4.16.0-rc2+ #326 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+0x194/0x24d 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 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 RIP: 0033:0x453de9 RSP: 002b:00007f8b04f0fc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f8b04f106d4 RCX: 0000000000453de9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020745000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 TCP: request_sock_TCPv6: Possible SYN flooding on port 20018. Sending cookies. Check SNMP counters. capability: warning: `syz-executor6' uses deprecated v2 capabilities in a way that may be insecure QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=4 nlmsg_type=30 sclass=netlink_tcpdiag_socket pig=6566 comm=syz-executor0 QAT: Invalid ioctl QAT: Invalid ioctl syz-executor4 uses obsolete (PF_INET,SOCK_PACKET) mmap: syz-executor0 (6723) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. xt_TCPMSS: Only works on TCP SYN packets xt_TCPMSS: Only works on TCP SYN packets kauditd_printk_skb: 19 callbacks suppressed audit: type=1400 audit(1519457819.632:41): avc: denied { ioctl } for pid=6838 comm="syz-executor3" path="socket:[18634]" dev="sockfs" ino=18634 ioctlcmd=0x8904 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 QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1519457819.859:42): avc: denied { bind } for pid=6900 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=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1519457819.867:43): avc: denied { getopt } for pid=6900 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=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1519457819.867:44): avc: denied { setopt } for pid=6900 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=netlink_netfilter_socket permissive=1 ipt_ECN: new ECT codepoint 80 out of mask ipt_ECN: new ECT codepoint 80 out of mask Disabled LAPIC found during irq injection syz-executor1 (7000) used greatest stack depth: 12608 bytes left syz-executor1 (7013) used greatest stack depth: 10656 bytes left Disabled LAPIC found during irq injection audit: type=1400 audit(1519457820.209:45): avc: denied { map } for pid=7024 comm="syz-executor1" path="/dev/input/mice" dev="devtmpfs" ino=9536 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:mouse_device_t:s0 tclass=chr_file permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1519457820.415:46): avc: denied { map } for pid=7095 comm="syz-executor3" path="/dev/usbmon0" dev="devtmpfs" ino=9534 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 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. program syz-executor3 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 program syz-executor3 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 audit: type=1400 audit(1519457821.187:47): avc: denied { setattr } for pid=7310 comm="syz-executor5" name="pagemap" dev="proc" ino=20500 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=file permissive=1 xt_l2tp: missing protocol rule (udp|l2tpip) xt_l2tp: missing protocol rule (udp|l2tpip) rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1519457821.590:48): avc: denied { read } for pid=7464 comm="syz-executor3" path="socket:[20148]" dev="sockfs" ino=20148 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(1519457821.626:49): avc: denied { setuid } for pid=7463 comm="syz-executor5" 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 audit: type=1400 audit(1519457822.019:50): avc: denied { net_bind_service } for pid=7106 comm="kworker/u5:1" capability=10 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=cap_userns permissive=1 Option ' ·ƒ4ˆ+ʼnlô's6® ' to dns_resolver key: bad/missing value IPv6: Can't replace route, no match found Option ' ·ƒ4ˆ+ʼnlô's6® ' to dns_resolver key: bad/missing value IPv6: Can't replace route, no match found binder: 7718:7730 got reply transaction with no transaction stack binder: 7718:7730 transaction failed 29201/-71, size 72-40 line 2763 binder: 7718:7730 transaction failed 29189/-22, size 0-0 line 2848 binder: 7718:7730 got reply transaction with no transaction stack binder: 7718:7730 transaction failed 29201/-71, size 72-40 line 2763 binder: 7718:7735 transaction failed 29189/-22, size 0-0 line 2848 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 xt_ecn: cannot match TCP bits in rule for non-tcp packets xt_ecn: cannot match TCP bits in rule for non-tcp packets device eql entered promiscuous mode IPVS: length: 69 != 24 IPVS: length: 69 != 24 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=770 sclass=netlink_audit_socket pig=8135 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=770 sclass=netlink_audit_socket pig=8144 comm=syz-executor1 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! binder: BINDER_SET_CONTEXT_MGR already set binder: 8248:8263 ioctl 40046207 0 returned -16 ipt_ECN: cannot use TCP operations on a non-tcp rule WARNING: CPU: 0 PID: 1846 at drivers/staging/android/ion/ion.c:122 ion_buffer_destroy+0xd4/0x190 drivers/staging/android/ion/ion.c:122 raw_sendmsg: syz-executor5 forgot to set AF_INET. Fix it!