====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #314 Not tainted ------------------------------------------------------ syz-executor2/5446 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000001efa6245>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000001efa6245>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000ea99dcbd>] 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 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 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-executor2/5446: #0: (rtnl_mutex){+.+.}, at: [<00000000ea99dcbd>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5446 Comm: syz-executor2 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:00007f71ac543c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f71ac5446d4 RCX: 0000000000453a59 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 000000000000001c R09: 0000000000000000 R10: 00000000207f1fe4 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000524 R14: 00000000006f7c00 R15: 0000000000000000 audit: type=1400 audit(1518776797.770:24): avc: denied { create } for pid=5453 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(1518776797.771:25): avc: denied { write } for pid=5453 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(1518776797.771:26): avc: denied { read } for pid=5453 comm="syz-executor3" path="socket:[14849]" dev="sockfs" ino=14849 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 x_tables: ip_tables: osf match: only valid for protocol 6 audit: type=1400 audit(1518776797.771:27): avc: denied { setopt } for pid=5448 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_generic_socket permissive=1 x86/PAT: syz-executor1:5488 map pfn RAM range req write-combining for [mem 0x1a02f0000-0x1a02f3fff], got write-back x_tables: ip_tables: osf match: only valid for protocol 6 x86/PAT: syz-executor1:5493 map pfn RAM range req write-combining for [mem 0x19e840000-0x19e843fff], got write-back xt_recent: Unsupported user space flags (00000061) xt_recent: Unsupported user space flags (00000061) binder: 5655:5658 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 5655:5658 Release 1 refcount change on invalid ref 0 ret -22 binder: 5655:5658 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 5655:5673 Release 1 refcount change on invalid ref 0 ret -22 binder: tried to use weak ref as strong ref binder: 5679:5688 got transaction to invalid handle binder: 5679:5688 transaction failed 29201/-22, size 0-8 line 2842 binder_alloc: binder_alloc_mmap_handler: 5679 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 5679: binder_alloc_buf, no vma binder: 5679:5702 transaction failed 29189/-3, size 80-16 line 2957 binder: 5679:5688 ioctl 40046207 0 returned -16 binder: 5679:5697 got transaction to invalid handle xt_connbytes: Forcing CT accounting to be enabled binder: 5679:5697 transaction failed 29201/-22, size 0-8 line 2842 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 5679:5688 transaction 4 out, still active binder: unexpected work type, 4, not freed binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: send failed reply for transaction 4, target dead device eql entered promiscuous mode device eql entered promiscuous mode xt_hashlimit: hashlimit invalid rate xt_hashlimit: hashlimit invalid rate syz-executor3 uses obsolete (PF_INET,SOCK_PACKET) xt_connbytes: Forcing CT accounting to be enabled capability: warning: `syz-executor6' uses 32-bit capabilities (legacy support in use) binder: 6027:6030 got reply transaction with bad transaction stack, transaction 15 has target 6027:0 binder: 6027:6030 transaction failed 29201/-71, size 0-0 line 2772 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 6027: binder_alloc_buf, no vma binder: 6027:6041 transaction failed 29189/-3, size 40-8 line 2957 binder: 6027:6030 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 xt_HMARK: hash modulus can't be zero binder: release 6027:6030 transaction 15 out, still active binder: send failed reply for transaction 15, target dead xt_HMARK: hash modulus can't be zero xt_connbytes: Forcing CT accounting to be enabled insert transport fail, errno -17 xt_connbytes: Forcing CT accounting to be enabled QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6237 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=256 sclass=netlink_route_socket pig=6250 comm=/dev/kvm xt_CT: You must specify a L4 protocol, and not use inversions on it. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=256 sclass=netlink_route_socket pig=6250 comm=/dev/kvm xt_CT: You must specify a L4 protocol, and not use inversions on it. BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 6362, name: syz-executor1 INFO: lockdep is turned off. CPU: 0 PID: 6362 Comm: syz-executor1 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 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6133 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453a59 RSP: 002b:00007fad3b1c2c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fad3b1c36d4 RCX: 0000000000453a59 RDX: 0000000000000000 RSI: 00000000200eafc8 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020472ff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 device bridge0 entered promiscuous mode device bridge0 left promiscuous mode sctp: [Deprecated]: syz-executor5 (pid 6474) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 6474) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_CT: You must specify a L4 protocol, and not use inversions on it. kauditd_printk_skb: 17 callbacks suppressed audit: type=1400 audit(1518776802.188:45): avc: denied { map } for pid=6614 comm="syz-executor0" path="/dev/loop0" dev="devtmpfs" ino=100 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:fixed_disk_device_t:s0 tclass=blk_file permissive=1 syz-executor5 (6619) used greatest stack depth: 15248 bytes left audit: type=1400 audit(1518776802.637:46): avc: denied { map } for pid=6741 comm="syz-executor5" path="socket:[17892]" dev="sockfs" ino=17892 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=rawip_socket permissive=1 binder: 6751:6753 transaction failed 29189/-22, size 0-0 line 2842 binder: 6751:6760 transaction failed 29189/-22, size 0-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl audit: type=1400 audit(1518776803.179:47): avc: denied { setgid } for pid=6825 comm="syz-executor3" capability=6 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 xprt_adjust_timeout: rq_timeout = 0! xprt_adjust_timeout: rq_timeout = 0! binder: BINDER_SET_CONTEXT_MGR already set binder: 6870:6872 ioctl 40046207 0 returned -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 6870:6875 ioctl 40046207 0 returned -16 xt_connbytes: Forcing CT accounting to be enabled audit: type=1400 audit(1518776803.793:48): avc: denied { ioctl } for pid=7033 comm="syz-executor5" path="socket:[18983]" dev="sockfs" ino=18983 ioctlcmd=0x894c 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-executor6': attribute type 3 has an invalid length. audit: type=1326 audit(1518776804.033:49): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7086 comm="syz-executor1" exe="/root/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 netlink: 'syz-executor6': attribute type 3 has an invalid length. audit: type=1326 audit(1518776804.097:50): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7086 comm="syz-executor1" exe="/root/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 xt_CT: You must specify a L4 protocol, and not use inversions on it. RDS: rds_bind could not find a transport for 0.0.0.9, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 128.0.0.1, load rds_tcp or rds_rdma? xt_CT: You must specify a L4 protocol, and not use inversions on it. RDS: rds_bind could not find a transport for 128.0.0.1, load rds_tcp or rds_rdma? audit: type=1400 audit(1518776804.399:51): avc: denied { map } for pid=7186 comm="syz-executor7" path="/selinux/status" dev="selinuxfs" ino=19 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518776804.425:52): avc: denied { map } for pid=7188 comm="syz-executor6" path="/dev/usbmon0" dev="devtmpfs" ino=9108 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 netlink: 'syz-executor5': attribute type 3 has an invalid length. netlink: 'syz-executor5': attribute type 3 has an invalid length. audit: type=1400 audit(1518776804.540:53): avc: denied { dyntransition } for pid=7222 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0 tclass=process permissive=1 audit: type=1400 audit(1518776804.571:54): avc: denied { set_context_mgr } for pid=7222 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1 binder: BINDER_SET_CONTEXT_MGR already set binder: 7222:7248 ioctl 40046207 0 returned -16 device eql entered promiscuous mode NFS: bad mount option value specified: v4' QAT: Invalid ioctl NFS: bad mount option value specified: v4' QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl kernel msg: ebtables bug: please report to author: Wrong len argument kernel msg: ebtables bug: please report to author: Wrong len argument device syz0 entered promiscuous mode device syz0 left promiscuous mode mmap: syz-executor5 (7477) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl binder: 7761:7767 transaction failed 29189/-22, size 40-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl binder: 7761:7792 transaction failed 29189/-22, size 40-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189