[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.975551] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 12.160415] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts. 2019/06/14 00:25:26 parsed 1 programs 2019/06/14 00:25:28 executed programs: 0 syzkaller login: [ 69.214917] audit: type=1400 audit(1560471928.555:5): avc: denied { associate } for pid=2100 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 69.235624] audit: type=1400 audit(1560471928.575:6): avc: denied { create } for pid=2249 comm="syz-executor.0" 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 [ 69.260172] audit: type=1400 audit(1560471928.605:7): avc: denied { write } for pid=2249 comm="syz-executor.0" 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 [ 69.289639] audit: type=1400 audit(1560471928.635:8): avc: denied { read } for pid=2249 comm="syz-executor.0" 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 [ 71.534942] ------------[ cut here ]------------ [ 71.541083] WARNING: CPU: 1 PID: 2978 at net/ipv4/tcp.c:2193 tcp_close+0xced/0x1070 [ 71.549002] Kernel panic - not syncing: panic_on_warn set ... [ 71.549002] [ 71.556405] CPU: 1 PID: 2978 Comm: syz-executor.0 Not tainted 4.9.141+ #1 [ 71.563358] ffff8801d06c7bc0 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff [ 71.571507] ffffffff82ca3800 0000000000000001 0000000000000009 ffff8801d06c7c80 [ 71.579688] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 71.587845] Call Trace: [ 71.590465] [] dump_stack+0xc1/0x128 [ 71.595904] [] panic+0x1bf/0x39f [ 71.600959] [] ? add_taint.cold.5+0x16/0x16 [ 71.606951] [] ? __warn.cold.8+0x14/0x2f [ 71.612687] [] ? tcp_close+0xced/0x1070 [ 71.618334] [] __warn.cold.8+0x2f/0x2f [ 71.623913] [] warn_slowpath_null+0x2c/0x40 [ 71.629922] [] tcp_close+0xced/0x1070 [ 71.635398] [] ? ip_mc_drop_socket+0x1d3/0x230 [ 71.641653] [] inet_release+0xff/0x1d0 [ 71.647300] [] inet6_release+0x50/0x70 [ 71.654419] [] __sock_release+0xd7/0x260 [ 71.660162] [] ? __sock_release+0x260/0x260 [ 71.666252] [] sock_close+0x19/0x20 [ 71.671556] [] __fput+0x263/0x700 [ 71.676683] [] ____fput+0x15/0x20 [ 71.681834] [] task_work_run+0x10c/0x180 [ 71.687575] [] exit_to_usermode_loop+0x129/0x150 [ 71.694007] [] do_syscall_64+0x3e2/0x550 [ 71.699858] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 71.707257] Kernel Offset: disabled [ 71.710949] Rebooting in 86400 seconds..