====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #297 Not tainted ------------------------------------------------------ syz-executor1/8224 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<00000000cfb496fb>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [<00000000c559627f>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&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:1041 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1088 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_ipt_get_ctl+0x159/0xac0 net/ipv4/netfilter/ip_tables.c:1699 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b -> #1 (sk_lock-AF_INET){+.+.}: 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 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b -> #0 (rtnl_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __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 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b other info that might help us debug this: Chain exists of: rtnl_mutex --> sk_lock-AF_INET --> &xt[i].mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&xt[i].mutex); lock(sk_lock-AF_INET); lock(&xt[i].mutex); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz-executor1/8224: #0: (&xt[i].mutex){+.+.}, at: [<00000000c559627f>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 stack backtrace: CPU: 1 PID: 8224 Comm: syz-executor1 Not tainted 4.15.0+ #297 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 __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 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453299 RSP: 002b:00007f0b4e90dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000004d4 R08: 00000000000002e0 R09: 0000000000000000 R10: 0000000020777825 R11: 0000000000000212 R12: 00000000006f6480 R13: 00000000ffffffff R14: 00007f0b4e90e6d4 R15: 0000000000000002 binder: 8252:8253 ioctl 540e 2 returned -22 binder: 8252:8253 ioctl 40045542 20019ffc returned -22 binder: 8252:8253 BC_REQUEST_DEATH_NOTIFICATION death notification already set binder: 8252:8284 ioctl 540e 2 returned -22 binder: 8252:8253 ioctl 40045542 20019ffc returned -22 binder: 8252:8284 BC_REQUEST_DEATH_NOTIFICATION death notification already set netlink: 'syz-executor3': attribute type 1 has an invalid length. kauditd_printk_skb: 13 callbacks suppressed audit: type=1400 audit(1517834046.057:80): avc: denied { write } for pid=8440 comm="syz-executor1" path="socket:[21711]" dev="sockfs" ino=21711 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 netlink: 'syz-executor2': attribute type 1 has an invalid length. snd_virmidi snd_virmidi.0: control 120:0:0:Î:0 is already present netlink: 'syz-executor2': attribute type 1 has an invalid length. SELinux: failed to load policy SELinux: failed to load policy xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. binder: 8629 RLIMIT_NICE not set binder: 8629 RLIMIT_NICE not set binder: release 8626:8629 transaction 16 in, still active binder: send failed reply for transaction 16 to 8626:8634 binder: 8642 RLIMIT_NICE not set binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: 8651:8654 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 8651:8654 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 8940:8943 ERROR: BC_REGISTER_LOOPER called without request binder: 8940:8943 BC_DEAD_BINDER_DONE 0000000000000002 not found binder: 8940:8943 got transaction to invalid handle binder: 8940:8943 transaction failed 29201/-22, size 0-0 line 2842 audit: type=1326 audit(1517834047.917:81): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8942 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517834047.937:82): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8942 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 binder: BINDER_SET_CONTEXT_MGR already set SELinux: unrecognized netlink message: protocol=0 nlmsg_type=35956 sclass=netlink_route_socket pig=8971 comm=syz-executor0 binder: 8940:8973 ioctl 40046207 0 returned -16 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=35956 sclass=netlink_route_socket pig=8971 comm=syz-executor0 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 binder: 9138:9142 transaction failed 29189/-22, size 0-0 line 2842 binder: 9138:9158 transaction failed 29189/-22, size 0-0 line 2842 binder: 9163 RLIMIT_NICE not set binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: 9163 RLIMIT_NICE not set audit: type=1400 audit(1517834048.859:83): avc: denied { read } for pid=9199 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 audit: type=1400 audit(1517834048.860:84): avc: denied { getopt } for pid=9199 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 audit: type=1326 audit(1517834048.966:85): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9211 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517834049.043:86): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9211 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 QAT: Invalid ioctl binder: 9296:9298 transaction failed 29201/-22, size -2-0 line 2957 binder_alloc: binder_alloc_mmap_handler: 9296 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 9296:9298 ioctl 40046207 0 returned -16 binder_alloc: 9296: binder_alloc_buf, no vma binder: 9296:9307 transaction failed 29189/-3, size -2-0 line 2957 binder_alloc: 9296: binder_alloc_buf, no vma QAT: Invalid ioctl binder: 9296:9298 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9321:9323 transaction failed 29201/-22, size -2-0 line 2957 audit: type=1400 audit(1517834049.316:87): avc: denied { ipc_lock } for pid=9314 comm="syz-executor1" 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 QAT: Invalid ioctl binder: undelivered TRANSACTION_ERROR: 29201 binder: 9334:9337 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9353:9356 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder_alloc: 9374: binder_alloc_buf, no vma binder: 9374:9381 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 PPPIOCDETACH file->f_count=2 PPPIOCDETACH file->f_count=2 binder_alloc: 9410: binder_alloc_buf, no vma binder: 9410:9415 transaction failed 29189/-3, size -2-0 line 2957 binder_alloc: 9410: binder_alloc_buf, no vma binder: 9410:9430 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 9449: binder_alloc_buf, no vma binder: 9449:9454 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: 9469:9472 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=34655 sclass=netlink_route_socket pig=9487 comm=syz-executor5 binder: 9497:9503 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9530:9536 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_COMPLETE binder: undelivered transaction 46, process died. xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 binder: 9574:9583 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9606:9609 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9625:9633 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9648:9653 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9671:9678 transaction failed 29189/-22, size -2-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: 9685:9693 transaction failed 29189/-22, size -2-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: 9708:9718 transaction failed 29189/-22, size -2-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 audit: type=1400 audit(1517834050.784:88): avc: denied { read } for pid=9730 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 binder_alloc: 9727: binder_alloc_buf, no vma binder: 9727:9736 transaction failed 29189/-3, size -2-0 line 2957 audit: type=1400 audit(1517834050.815:89): avc: denied { getopt } for pid=9730 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 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 9751: binder_alloc_buf, no vma binder: 9751:9753 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 9779: binder_alloc_buf, no vma binder: 9779:9782 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: 9870:9871 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder: 9882:9884 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 binder_alloc: binder_alloc_mmap_handler: 9960 20db9000-20dba000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 9960: binder_alloc_buf, no vma binder: 9960:9964 ioctl 40046207 0 returned -16 binder: 9960:9965 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: send failed reply for transaction 69 to 9960:9964 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: 9995:9996 transaction failed 29201/-22, size -2-0 line 2957 audit: type=1400 audit(1517834052.098:90): avc: denied { map } for pid=10000 comm="syz-executor2" path="pipe:[24461]" dev="pipefs" ino=24461 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=fifo_file permissive=1 binder: undelivered TRANSACTION_ERROR: 29201 binder: 10017:10029 transaction failed 29201/-22, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=161 sclass=netlink_route_socket pig=10045 comm=syz-executor3 binder_alloc: 10047: binder_alloc_buf, no vma binder: 10047:10059 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=161 sclass=netlink_route_socket pig=10073 comm=syz-executor3 binder_alloc: 10079: binder_alloc_buf, no vma binder: 10079:10080 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 audit: type=1400 audit(1517834052.963:91): avc: denied { prog_load } for pid=10085 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 binder_alloc: 10112: binder_alloc_buf, no vma binder: 10112:10115 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 10131: binder_alloc_buf, no vma binder: 10131:10138 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 10149: binder_alloc_buf, no vma binder: 10149:10150 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder_alloc: 10159: binder_alloc_buf, no vma binder: 10159:10162 transaction failed 29189/-3, size -2-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: 10179:10182 transaction failed 29189/-22, size -2-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: 10199:10201 transaction failed 29189/-22, size -2-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 audit: type=1400 audit(1517834054.580:92): avc: denied { validate_trans } for pid=10210 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=security permissive=1 binder: 10211:10214 transaction failed 29189/-22, size -2-0 line 2842 binder: BINDER_SET_CONTEXT_MGR already set binder: 10218:10223 ioctl 40046207 0 returned -16