random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1555003066.210:36): avc: denied { map } for pid=7047 comm="syz-executor810" path="/root/syz-executor810306520" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
audit: type=1400 audit(1555003066.210:37): avc: denied { create } for pid=7047 comm="syz-executor810" 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(1555003066.210:38): avc: denied { write } for pid=7047 comm="syz-executor810" 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
WARNING: suspicious RCU usage
audit: type=1400 audit(1555003066.210:39): avc: denied { read } for pid=7047 comm="syz-executor810" 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
4.14.111 #1 Not tainted
-----------------------------
net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
2 locks held by syz-executor810/7047:
#0: (cb_lock){++++}, at: [<ffffffff84f3556a>] genl_rcv+0x1a/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff84f362e9>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff84f362e9>] genl_rcv_msg+0x119/0x150 net/netlink/genetlink.c:623
stack backtrace:
CPU: 0 PID: 7047 Comm: syz-executor810 Not tainted 4.14.111 #1
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+0x138/0x19c lib/dump_stack.c:53
lockdep_rcu_suspicious+0x153/0x15d kernel/locking/lockdep.c:4665
tipc_bearer_find+0x20a/0x300 net/tipc/bearer.c:177
tipc_nl_compat_link_set+0x421/0xbe0 net/tipc/netlink_compat.c:770
__tipc_nl_compat_doit net/tipc/netlink_compat.c:298 [inline]
tipc_nl_compat_doit+0x170/0x520 net/tipc/netlink_compat.c:345
tipc_nl_compat_handle net/tipc/netlink_compat.c:1167 [inline]
tipc_nl_compat_recv+0x9be/0xaf0 net/tipc/netlink_compat.c:1249
genl_family_rcv_msg+0x61c/0xc40 net/netlink/genetlink.c:600
genl_rcv_msg+0xb4/0x150 net/netlink/genetlink.c:625
netlink_rcv_skb+0x152/0x3c0 net/netlink/af_netlink.c:2432
genl_rcv+0x29/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
netlink_unicast+0x466/0x780 net/netlink/af_netlink.c:1312
netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xd0/0x110 net/socket.c:656
___sys_sendmsg+0x70c/0x850 net/socket.c:2062
__sys_sendmsg+0xb9/0x140 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2103
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x444229
RSP: 002b:00007ffe5016c7b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444229
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003