syzbot


possible deadlock in xt_find_table_lock (2)

Status: fixed on 2018/02/26 20:04
Subsystems: netfilter
[Documentation on labels]
Reported-by: syzbot+84a55d9a3989a195d722@syzkaller.appspotmail.com
Fix commit: 01ea306f2ac2 netfilter: drop outermost socket lock in getsockopt()
First crash: 2319d, last: 2317d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 possible deadlock in xt_find_table_lock C 4113 472d 1569d 0/1 upstream: reported C repro on 2020/02/26 14:41
upstream possible deadlock in xt_find_table_lock netfilter 2 2325d 2326d 0/28 closed as dup on 2018/01/30 09:07

Sample crash report:
binder: undelivered TRANSACTION_ERROR: 29201
binder: send failed reply for transaction 10, target dead

======================================================
WARNING: possible circular locking dependency detected
4.15.0+ #301 Not tainted
------------------------------------------------------
syz-executor2/6218 is trying to acquire lock:
 (&xt[i].mutex){+.+.}, at: [<00000000366acd16>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041

but task is already holding lock:
 (sk_lock-AF_INET6){+.+.}, at: [<000000009e4030ab>] lock_sock include/net/sock.h:1463 [inline]
 (sk_lock-AF_INET6){+.+.}, at: [<000000009e4030ab>] ipv6_getsockopt+0x1c5/0x2e0 net/ipv6/ipv6_sockglue.c:1370

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (sk_lock-AF_INET6){+.+.}:
       lock_sock_nested+0xc2/0x110 net/core/sock.c:2777
       lock_sock include/net/sock.h:1463 [inline]
       do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167
       ipv6_setsockopt+0xd7/0x130 net/ipv6/ipv6_sockglue.c:922
       udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1422
       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

-> #1 (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
       clusterip_config_entry_put net/ipv4/netfilter/ipt_CLUSTERIP.c:114 [inline]
       clusterip_tg_destroy+0x389/0x6e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:518
       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

-> #0 (&xt[i].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
       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_ip6t_get_ctl+0x159/0xaf0 net/ipv6/netfilter/ip6_tables.c:1710
       nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
       nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122
       ipv6_getsockopt+0x1df/0x2e0 net/ipv6/ipv6_sockglue.c:1371
       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

other info that might help us debug this:

Chain exists of:
  &xt[i].mutex --> rtnl_mutex --> sk_lock-AF_INET6

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(sk_lock-AF_INET6);
                               lock(rtnl_mutex);
                               lock(sk_lock-AF_INET6);
  lock(&xt[i].mutex);

 *** DEADLOCK ***

1 lock held by syz-executor2/6218:
 #0:  (sk_lock-AF_INET6){+.+.}, at: [<000000009e4030ab>] lock_sock include/net/sock.h:1463 [inline]
 #0:  (sk_lock-AF_INET6){+.+.}, at: [<000000009e4030ab>] ipv6_getsockopt+0x1c5/0x2e0 net/ipv6/ipv6_sockglue.c:1370

stack backtrace:
CPU: 0 PID: 6218 Comm: syz-executor2 Not tainted 4.15.0+ #301
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
 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_ip6t_get_ctl+0x159/0xaf0 net/ipv6/netfilter/ip6_tables.c:1710
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122
 ipv6_getsockopt+0x1df/0x2e0 net/ipv6/ipv6_sockglue.c:1371
 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
RIP: 0033:0x453299
RSP: 002b:00007f4f29fbdc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000014
RBP: 00000000000000e5 R08: 000000002000cffc R09: 0000000000000000
R10: 000000002000e000 R11: 0000000000000212 R12: 00000000006f0618
R13: 00000000ffffffff R14: 00007f4f29fbe6d4 R15: 0000000000000000
audit: type=1326 audit(1518042698.532:41): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.543:42): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.548:43): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=55 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.548:44): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.548:45): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.557:46): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=54 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1326 audit(1518042698.560:47): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6257 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
device lo entered promiscuous mode
device lo left promiscuous mode
sctp: [Deprecated]: syz-executor0 (pid 6441) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor0 (pid 6454) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
Protocol error: SET target dimension is over the limit!
Protocol error: SET target dimension is over the limit!
syz-executor1 (6496): /proc/6496/oom_adj is deprecated, please use /proc/6496/oom_score_adj instead.
QAT: Invalid ioctl
QAT: Invalid ioctl
TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies.  Check SNMP counters.
netlink: 'syz-executor2': attribute type 1 has an invalid length.
netlink: 'syz-executor2': attribute type 1 has an invalid length.
xt_l2tp: missing protocol rule (udp|l2tpip)
netlink: 'syz-executor0': attribute type 1 has an invalid length.
xt_l2tp: missing protocol rule (udp|l2tpip)
netlink: 'syz-executor0': attribute type 1 has an invalid length.
device eql entered promiscuous mode
Protocol error: SET target dimension is over the limit!
Protocol error: SET target dimension is over the limit!
xprt_adjust_timeout: rq_timeout = 0!
xprt_adjust_timeout: rq_timeout = 0!
binder: 7072:7076 transaction failed 29189/-22, size 40-0 line 2842
binder: 7072:7076 transaction failed 29189/-22, size 40-0 line 2842
binder: 7072:7079 got reply transaction with no transaction stack
binder: 7072:7079 transaction failed 29201/-71, size 0-0 line 2757
binder: undelivered TRANSACTION_ERROR: 29189
xt_cgroup: no path or classid specified
xt_cgroup: no path or classid specified
kauditd_printk_skb: 49 callbacks suppressed
audit: type=1400 audit(1518042702.002:97): avc:  denied  { setfcap } for  pid=7147 comm="syz-executor6" capability=31  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
binder: 7161 RLIMIT_NICE not set
netlink: 'syz-executor7': attribute type 1 has an invalid length.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
binder: 7159:7180 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
PPPIOCDETACH file->f_count=2
binder: 7159:7161 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 7161 RLIMIT_NICE not set
binder: 7159:7161 BC_DEAD_BINDER_DONE 0000000000000000 not found
binder: undelivered death notification, 0000000000000000
audit: type=1400 audit(1518042702.169:98): avc:  denied  { map } for  pid=7189 comm="syz-executor5" path=2F6D656D66643A49202864656C6574656429 dev="tmpfs" ino=18817 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 7212 Comm: syz-executor3 Not tainted 4.15.0+ #301
binder: BINDER_SET_CONTEXT_MGR already set
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
device eql entered promiscuous mode
binder: 7190:7216 ioctl 40046207 0 returned -16
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3629
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046
 __sys_sendmsg+0xe5/0x210 net/socket.c:2080
 SYSC_sendmsg net/socket.c:2091 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2087
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f27f304cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000000 RSI: 0000000020008000 RDI: 0000000000000013
RBP: 00000000000004b1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6138
R13: 0000000000000014 R14: 00007f27f304d6d4 R15: ffffffffffffffff
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 7243 Comm: syz-executor3 Not tainted 4.15.0+ #301
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_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3648
 __do_kmalloc_node mm/slab.c:3668 [inline]
 __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3683
 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137
 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046
 __sys_sendmsg+0xe5/0x210 net/socket.c:2080
 SYSC_sendmsg net/socket.c:2091 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2087
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f27f304cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000000 RSI: 0000000020008000 RDI: 0000000000000013
RBP: 00000000000004b1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6138
R13: 0000000000000014 R14: 00007f27f304d6d4 R15: ffffffffffffffff
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 7267 Comm: syz-executor3 Not tainted 4.15.0+ #301
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_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3629
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_dump+0x545/0xcf0 net/netlink/af_netlink.c:2203
 __netlink_dump_start+0x4f0/0x6d0 net/netlink/af_netlink.c:2319
 genl_family_rcv_msg+0xd21/0xfb0 net/netlink/genetlink.c:548
 genl_rcv_msg+0xb2/0x140 net/netlink/genetlink.c:624
 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2442
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635
 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline]
 netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046
 __sys_sendmsg+0xe5/0x210 net/socket.c:2080
 SYSC_sendmsg net/socket.c:2091 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2087
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f27f304cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000000 RSI: 0000000020008000 RDI: 0000000000000013
RBP: 00000000000004b1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6138
R13: 0000000000000014 R14: 00007f27f304d6d4 R15: ffffffffffffffff
audit: type=1326 audit(1518042703.921:99): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7362 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7373 comm=syz-executor7
audit: type=1326 audit(1518042703.946:100): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7362 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=41 compat=0 ip=0x453299 code=0x7ffc0000
audit: type=1400 audit(1518042704.039:101): avc:  denied  { ioctl } for  pid=7407 comm="syz-executor3" path="socket:[19088]" dev="sockfs" ino=19088 ioctlcmd=0x8933 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
sctp: [Deprecated]: syz-executor1 (pid 7417) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
audit: type=1400 audit(1518042704.561:102): avc:  denied  { getattr } for  pid=7547 comm="syz-executor2" path="socket:[19283]" dev="sockfs" ino=19283 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
rfkill: input handler enabled
binder: BINDER_SET_CONTEXT_MGR already set
binder: 7599:7607 ioctl 40046207 0 returned -16
rfkill: input handler disabled
rfkill: input handler enabled
binder: 7685 RLIMIT_NICE not set
binder: 7681 RLIMIT_NICE not set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 7680:7685 ioctl 40046207 0 returned -16
QAT: Invalid ioctl
binder: 7680:7695 BC_FREE_BUFFER u000000002000c000 no match
binder_alloc: 7680: binder_alloc_buf, no vma
binder: 7680:7685 transaction failed 29189/-3, size 0-0 line 2957
QAT: Invalid ioctl
binder: 7677:7707 tried to acquire reference to desc 0, got 1 instead
binder: undelivered TRANSACTION_ERROR: 29189
binder: 7677:7707 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: undelivered TRANSACTION_COMPLETE
binder: 7677:7701 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 7701 RLIMIT_NICE not set
device eql entered promiscuous mode
binder: 7677:7721 BC_DEAD_BINDER_DONE 0000000000000000 not found
binder: undelivered death notification, 0000000000000000
audit: type=1400 audit(1518042706.568:103): avc:  denied  { connect } for  pid=7890 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
atomic_op 00000000a9a93d9d conn xmit_atomic           (null)
atomic_op 000000007a28a612 conn xmit_atomic           (null)
netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'.
audit: type=1400 audit(1518042706.913:104): avc:  denied  { lock } for  pid=7956 comm="syz-executor3" path="socket:[20985]" dev="sockfs" ino=20985 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
syz-executor4 uses obsolete (PF_INET,SOCK_PACKET)
device eql entered promiscuous mode
binder: 8054:8058 Acquire 1 refcount change on invalid ref 0 ret -22
binder: 8054:8058 Release 1 refcount change on invalid ref 0 ret -22
binder: 8054:8061 Acquire 1 refcount change on invalid ref 0 ret -22
device lo entered promiscuous mode
device lo left promiscuous mode
netlink: 'syz-executor2': attribute type 1 has an invalid length.
netlink: 'syz-executor2': attribute type 1 has an invalid length.

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/07 22:31 upstream a2e5790d8416 9fb5ec43 .config console log report ci-upstream-kasan-gce
2018/02/07 09:05 upstream cbd7b8a76b79 66c15deb .config console log report ci-upstream-kasan-gce
2018/02/08 22:31 net-next-old 617aebe6a97e 9fb5ec43 .config console log report ci-upstream-net-kasan-gce
2018/02/06 14:30 net-next-old 617aebe6a97e 645ce5da .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.