======================================================
WARNING: possible circular locking dependency detected
4.15.0+ #297 Not tainted
------------------------------------------------------
syz-executor2/5714 is trying to acquire lock:
(rtnl_mutex){+.+.}, at: [<000000006d05b9dd>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
but task is already holding lock:
(&xt[i].mutex){+.+.}, at: [<000000000696bc7f>] 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
sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4104
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-executor2/5714:
#0: (&xt[i].mutex){+.+.}, at: [<000000000696bc7f>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041
stack backtrace:
CPU: 1 PID: 5714 Comm: syz-executor2 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:00007f495f8b4c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000014
RBP: 00000000000004d4 R08: 00000000000002e0 R09: 0000000000000000
R10: 0000000020777825 R11: 0000000000000212 R12: 00000000006f6480
R13: 00000000ffffffff R14: 00007f495f8b56d4 R15: 0000000000000000
binder: 5747:5754 BC_DEAD_BINDER_DONE 0000000000000000 not found
binder: 5747:5765 BC_DEAD_BINDER_DONE 0000000000000000 not found
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=20 sclass=netlink_audit_socket pig=5839 comm=syz-executor7
audit: type=1400 audit(1517836064.965:53): avc: denied { write } for pid=5831 comm="syz-executor6" name="net" dev="proc" ino=15011 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(1517836064.991:54): avc: denied { add_name } for pid=5831 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
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=20 sclass=netlink_audit_socket pig=5854 comm=syz-executor7
audit: type=1400 audit(1517836064.992:55): avc: denied { create } for pid=5831 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(1517836065.116:56): avc: denied { map } for pid=5869 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=15743 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1
device syz2 entered promiscuous mode
audit: type=1400 audit(1517836065.230:57): avc: denied { setopt } for pid=5894 comm="syz-executor6" 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
xt_l2tp: invalid flags combination: 8
xt_l2tp: invalid flags combination: 8
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
TCP: request_sock_TCP: Possible SYN flooding on port 20018. Sending cookies. Check SNMP counters.
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
binder: 6043:6046 ERROR: BC_REGISTER_LOOPER called without request
binder: 6043:6046 unknown command 0
binder: 6043:6046 ioctl c0306201 20007000 returned -22
audit: type=1400 audit(1517836065.746:58): avc: denied { map } for pid=6043 comm="syz-executor0" path="/dev/binder0" dev="devtmpfs" ino=9130 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: 6043:6046 BC_ACQUIRE_DONE uffffffffffffffff no match
binder: 6046 RLIMIT_NICE not set
binder: 6043:6058 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 6058 RLIMIT_NICE not set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 6043:6061 ERROR: BC_REGISTER_LOOPER called without request
binder: 6043:6058 ioctl 40046207 0 returned -16
binder: 6043:6061 unknown command 0
binder: 6043:6062 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 6043:6061 ioctl c0306201 20007000 returned -22
binder: 6062 RLIMIT_NICE not set
binder: 6043:6058 BC_ACQUIRE_DONE uffffffffffffffff no match
audit: type=1400 audit(1517836065.902:59): avc: denied { ipc_owner } for pid=6069 comm="syz-executor1" capability=15 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(1517836065.903:60): avc: denied { map } for pid=6066 comm="syz-executor5" path="/selinux/mls" dev="selinuxfs" ino=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1
binder: 6112:6117 unknown command 0
binder: 6112:6117 ioctl c0306201 2000a000 returned -22
audit: type=1400 audit(1517836066.104:61): avc: denied { call } for pid=6112 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=binder permissive=1
kvm [6134]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0x186 data 0x9
binder_alloc: binder_alloc_mmap_handler: 6112 20000000-20002000 already mapped failed -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 6112:6117 ioctl 40046207 0 returned -16
device lo entered promiscuous mode
device lo left promiscuous mode
binder: 6112:6159 unknown command 0
binder: 6112:6159 ioctl c0306201 2000a000 returned -22
binder_alloc: 6112: binder_alloc_buf, no vma
binder: 6112:6117 transaction failed 29189/-3, size 56-8 line 2957
kvm [6134]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0x186 data 0x9
binder: undelivered TRANSACTION_ERROR: 29189
binder: release 6112:6117 transaction 9 out, still active
xt_cgroup: invalid path, errno=-2
binder: undelivered TRANSACTION_COMPLETE
binder: send failed reply for transaction 9, target dead
xt_cgroup: invalid path, errno=-2
Disabled LAPIC found during irq injection
encrypted_key: insufficient parameters specified
binder: 6483:6485 got reply transaction with no transaction stack
binder: 6483:6485 transaction failed 29201/-71, size 0-0 line 2757
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
device eql entered promiscuous mode
QAT: Invalid ioctl
netlink: 'syz-executor1': attribute type 1 has an invalid length.
l2tp_core: tunl 59: sockfd_lookup(fd=0) returned -88
netlink: 'syz-executor1': attribute type 1 has an invalid length.
kauditd_printk_skb: 6 callbacks suppressed
audit: type=1400 audit(1517836069.200:68): avc: denied { map } for pid=6833 comm="syz-executor3" path="/proc/334/net/pfkey" dev="proc" ino=4026532765 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:proc_net_t:s0 tclass=file permissive=1
mmap: syz-executor1 (6861) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt.
device eql entered promiscuous mode
audit: type=1400 audit(1517836069.372:69): avc: denied { create } for pid=6879 comm="syz-executor7" 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
audit: type=1400 audit(1517836069.377:70): avc: denied { bind } for pid=6879 comm="syz-executor7" 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
audit: type=1400 audit(1517836069.451:71): avc: denied { map } for pid=6888 comm="syz-executor6" path="socket:[17984]" dev="sockfs" ino=17984 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=unix_stream_socket permissive=1
sctp: [Deprecated]: syz-executor1 (pid 7007) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
sctp: [Deprecated]: syz-executor1 (pid 7018) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
audit: type=1326 audit(1517836070.436:72): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1517836070.438:73): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000
audit: type=1326 audit(1517836070.463:74): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1517836070.463:75): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1517836070.511:76): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=157 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1517836070.511:77): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7068 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
l2tp_core: tunl 2: fd 22 wrong protocol, got 0, expected 17
l2tp_core: tunl 2: fd 27 wrong protocol, got 0, expected 17
dccp_invalid_packet: P.Data Offset(0) too small
dccp_invalid_packet: P.Data Offset(0) too small
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 PID: 7504 Comm: syz-executor2 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
fail_dump lib/fault-inject.c:51 [inline]
should_fail+0x8c0/0xa40 lib/fault-inject.c:149
should_failslab+0xec/0x120 mm/failslab.c:32
slab_pre_alloc_hook mm/slab.h:422 [inline]
slab_alloc mm/slab.c:3365 [inline]
kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3605
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
kvm_uevent_notify_change.part.38+0x8d/0x430 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3871
kvm_uevent_notify_change arch/x86/kvm/../../../virt/kvm/kvm_main.c:3857 [inline]
kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:715 [inline]
kvm_put_kvm+0x181/0xde0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:756
kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:767
__fput+0x327/0x7e0 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x199/0x270 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
do_syscall_64+0x6ed/0x940 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f495f8b4c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000021