[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 33.290437] random: sshd: uninitialized urandom read (32 bytes read)
[ 33.552648] kauditd_printk_skb: 9 callbacks suppressed
[ 33.552655] audit: type=1400 audit(1568200427.031:35): avc: denied { map } for pid=6746 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
[ 33.601477] random: sshd: uninitialized urandom read (32 bytes read)
[ 34.122076] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.1.5' (ECDSA) to the list of known hosts.
[ 39.915144] urandom_read: 1 callbacks suppressed
[ 39.915148] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[ 40.028173] audit: type=1400 audit(1568200433.501:36): avc: denied { map } for pid=6759 comm="syz-executor058" path="/root/syz-executor058405568" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[ 40.032763]
[ 40.055295] audit: type=1400 audit(1568200433.501:37): avc: denied { create } for pid=6759 comm="syz-executor058" 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
[ 40.056228] =============================
[ 40.080313] audit: type=1400 audit(1568200433.511:38): avc: denied { write } for pid=6759 comm="syz-executor058" 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
[ 40.080329] audit: type=1400 audit(1568200433.511:39): avc: denied { read } for pid=6759 comm="syz-executor058" 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
[ 40.132261] WARNING: suspicious RCU usage
[ 40.136396] 4.14.143 #0 Not tainted
[ 40.139998] -----------------------------
[ 40.144732] net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage!
[ 40.152645]
[ 40.152645] other info that might help us debug this:
[ 40.152645]
[ 40.160826]
[ 40.160826] rcu_scheduler_active = 2, debug_locks = 1
[ 40.167477] 2 locks held by syz-executor058/6759:
[ 40.172438] #0: (cb_lock){++++}, at: [<ffffffff84f531ea>] genl_rcv+0x1a/0x40
[ 40.179811] #1: (genl_mutex){+.+.}, at: [<ffffffff84f56a39>] genl_rcv_msg+0x119/0x150
[ 40.188045]
[ 40.188045] stack backtrace:
[ 40.192599] CPU: 1 PID: 6759 Comm: syz-executor058 Not tainted 4.14.143 #0
[ 40.199595] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 40.208928] Call Trace:
[ 40.211495] dump_stack+0x138/0x197
[ 40.215102] lockdep_rcu_suspicious+0x153/0x15d
[ 40.219745] tipc_bearer_find+0x20a/0x300
[ 40.223869] tipc_nl_compat_link_set+0x433/0xbf0
[ 40.228600] tipc_nl_compat_doit+0x1a2/0x550
[ 40.233000] ? security_capable+0x8e/0xc0
[ 40.237123] ? tipc_nl_compat_link_stat_dump+0x2080/0x2080
[ 40.242723] ? ns_capable_common+0x12c/0x160
[ 40.247108] ? ns_capable+0x23/0x30
[ 40.250723] ? __netlink_ns_capable+0xe2/0x130
[ 40.255284] tipc_nl_compat_recv+0x9ec/0xb20
[ 40.259693] ? is_bpf_text_address+0xa6/0x120
[ 40.264163] ? tipc_nl_compat_doit+0x550/0x550
[ 40.268718] ? tipc_nl_node_dump+0xc90/0xc90
[ 40.273099] ? tipc_nl_compat_bearer_enable+0x570/0x570
[ 40.278440] ? lock_acquire+0x16f/0x430
[ 40.282387] ? genl_rcv_msg+0x119/0x150
[ 40.286337] ? genl_rcv_msg+0x119/0x150
[ 40.290287] genl_family_rcv_msg+0x614/0xc30
[ 40.294673] ? genl_unregister_family+0x6a0/0x6a0
[ 40.299498] genl_rcv_msg+0xb4/0x150
[ 40.303187] netlink_rcv_skb+0x14f/0x3c0
[ 40.307243] ? genl_family_rcv_msg+0xc30/0xc30
[ 40.311801] ? netlink_ack+0x9a0/0x9a0
[ 40.315664] ? genl_rcv+0x1a/0x40
[ 40.319097] genl_rcv+0x29/0x40
[ 40.322351] netlink_unicast+0x45d/0x640
[ 40.326386] ? netlink_attachskb+0x6a0/0x6a0
[ 40.330771] ? security_netlink_send+0x81/0xb0
[ 40.335329] netlink_sendmsg+0x7c4/0xc60
[ 40.339369] ? netlink_unicast+0x640/0x640
[ 40.343579] ? security_socket_sendmsg+0x89/0xb0
[ 40.348309] ? netlink_unicast+0x640/0x640
[ 40.352527] sock_sendmsg+0xce/0x110
[ 40.356216] ___sys_sendmsg+0x70a/0x840
[ 40.360166] ? copy_msghdr_from_user+0x3f0/0x3f0
[ 40.364901] ? __lock_acquire+0x5f7/0x4620
[ 40.369111] ? save_trace+0x290/0x290
[ 40.372893] ? trace_hardirqs_on+0x10/0x10
[ 40.377103] ? save_trace+0x290/0x290
[ 40.380878] ? lock_downgrade+0x6e0/0x6e0
[ 40.385015] ? task_work_run+0xf0/0x190
[ 40.388965] ? __fget_light+0x172/0x1f0
[ 40.392916] ? __fdget+0x1b/0x20
[ 40.396255] ? sockfd_lookup_light+0xb4/0x160
[ 40.400726] __sys_sendmsg+0xb9/0x140
[ 40.404503] ? SyS_shutdown+0x170/0x170
[ 40.408453] ? trace_hardirqs_on_caller+0x400/0x590
[ 40.413452] SyS_sendmsg+0x2d/0x50
[ 40.416967] ? __sys_sendmsg+0x140/0x140
[ 40.421003] do_syscall_64+0x1e8/0x640
[ 40.424864] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 40.429686] entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 40.434851] RIP: 0033:0x4441b9
[ 40.438016] RSP: 002b:00007fff265aed98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 40.445720] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004441b9
[ 40.452973] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
[ 40.460218] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0
[ 40.467463] R10: 0000000000001800 R11: 0000000000000246 R12: 0000000000401e60
[ 40.474752] R13: 0000000000401ef0 R14: 0000000000000000 R15