[....] Starting enhanced syslogd: rsyslogd[ 13.455203] audit: type=1400 audit(1521214093.151:4): avc: denied { syslog } for pid=3640 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. 2018/03/16 15:28:28 parsed 1 programs 2018/03/16 15:28:28 executed programs: 0 syzkaller login: [ 28.654224] audit: type=1400 audit(1521214108.351:5): avc: denied { sys_admin } for pid=3802 comm="syz-executor4" capability=21 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 [ 28.685523] IPVS: Creating netns size=2536 id=1 [ 28.694730] audit: type=1400 audit(1521214108.391:6): avc: denied { net_admin } for pid=3809 comm="syz-executor6" capability=12 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 [ 28.729731] IPVS: Creating netns size=2536 id=2 [ 28.753687] IPVS: Creating netns size=2536 id=3 [ 28.775520] IPVS: Creating netns size=2536 id=4 [ 28.808121] IPVS: Creating netns size=2536 id=5 [ 28.826535] IPVS: Creating netns size=2536 id=6 [ 28.849137] IPVS: Creating netns size=2536 id=7 [ 28.869082] IPVS: Creating netns size=2536 id=8 [ 29.890641] audit: type=1400 audit(1521214109.591:7): avc: denied { sys_chroot } for pid=3809 comm="syz-executor6" capability=18 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 [ 29.975834] audit: type=1400 audit(1521214109.671:8): avc: denied { net_raw } for pid=4910 comm="syz-executor6" capability=13 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 [ 30.042910] audit: type=1400 audit(1521214109.741:9): avc: denied { dac_override } for pid=4910 comm="syz-executor6" capability=1 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 [ 30.113442] ------------[ cut here ]------------ [ 30.118201] WARNING: CPU: 1 PID: 4936 at net/core/skbuff.c:4330 skb_try_coalesce+0xfc3/0x1600 [ 30.141175] Kernel panic - not syncing: panic_on_warn set ... [ 30.141175] [ 30.148532] CPU: 1 PID: 4936 Comm: syz-executor6 Not tainted 4.9.87-gfc8bd0f #58 [ 30.156031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.165359] ffff8801c5f47058 ffffffff81d95bd9 ffffffff83a480c0 ffff8801c5f47130 [ 30.173397] ffffffff83ee1200 ffffffff82f0dcd3 0000000000000009 ffff8801c5f47120 [ 30.181426] ffffffff8142f7e1 0000000041b58ab3 ffffffff8418b890 ffffffff8142f625 [ 30.189449] Call Trace: [ 30.192022] [] dump_stack+0xc1/0x128 [ 30.197378] [] ? skb_try_coalesce+0xfc3/0x1600 [ 30.203599] [] panic+0x1bc/0x3a8 [ 30.208605] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 30.216818] [] ? load_image_and_restore+0xf9/0xf9 [ 30.223295] [] ? __warn+0x1a9/0x1e0 [ 30.228561] [] ? skb_try_coalesce+0xfc3/0x1600 [ 30.234778] [] __warn+0x1c4/0x1e0 [ 30.239867] [] warn_slowpath_null+0x2c/0x40 [ 30.245826] [] skb_try_coalesce+0xfc3/0x1600 [ 30.251870] [] ? tcp_ack+0x358/0x5390 [ 30.257311] [] tcp_try_coalesce+0x153/0x4a0 [ 30.263268] [] ? tcp_prune_ofo_queue.part.48+0x3b0/0x3b0 [ 30.270351] [] ? tcp_try_rmem_schedule+0x6ae/0xf90 [ 30.276920] [] tcp_queue_rcv+0x12d/0x790 [ 30.282615] [] tcp_data_queue+0x8b4/0x4050 [ 30.288484] [] ? tcp_fin+0x850/0x850 [ 30.293833] [] ? tcp_xmit_recovery.part.54+0x120/0x120 [ 30.300748] [] tcp_rcv_established+0x6e8/0x2070 [ 30.307051] [] ? tcp_data_queue+0x4050/0x4050 [ 30.313179] [] ? rt6_check+0x15b/0x250 [ 30.318699] [] ? ip6_mtu+0x2c0/0x340 [ 30.324050] [] ? ip6_dst_check+0x16e/0x2c0 [ 30.329919] [] tcp_v6_do_rcv+0x40d/0x1380 [ 30.335705] [] __release_sock+0x12b/0x390 [ 30.341487] [] release_sock+0x59/0x1c0 [ 30.347008] [] tcp_sendpage+0xb8f/0x1950 [ 30.352707] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.359097] [] ? inet_sendpage+0x203/0x500 [ 30.364972] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.371371] [] inet_sendpage+0x2d7/0x500 [ 30.377065] [] ? inet_sendpage+0x7b/0x500 [ 30.382848] [] ? inet_sendmsg+0x4c0/0x4c0 [ 30.388635] [] kernel_sendpage+0x8d/0xe0 [ 30.394334] [] sock_sendpage+0x8c/0xc0 [ 30.399866] [] ? kernel_sendpage+0xe0/0xe0 [ 30.405738] [] pipe_to_sendpage+0x264/0x320 [ 30.411693] [] ? direct_splice_actor+0x180/0x180 [ 30.418087] [] ? splice_from_pipe_next.part.10+0x22e/0x2f0 [ 30.425353] [] __splice_from_pipe+0x323/0x730 [ 30.431486] [] ? direct_splice_actor+0x180/0x180 [ 30.437878] [] splice_from_pipe+0xf9/0x160 [ 30.443747] [] ? direct_splice_actor+0x180/0x180 [ 30.450138] [] ? splice_shrink_spd+0xb0/0xb0 [ 30.456180] [] generic_splice_sendpage+0x40/0x50 [ 30.462572] [] ? splice_from_pipe+0x160/0x160 [ 30.468701] [] direct_splice_actor+0x125/0x180 [ 30.474919] [] splice_direct_to_actor+0x2cc/0x800 [ 30.481393] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.488044] [] ? do_splice_to+0x160/0x160 [ 30.493829] [] ? security_file_permission+0x89/0x1e0 [ 30.500565] [] ? rw_verify_area+0xe5/0x2b0 [ 30.506437] [] do_splice_direct+0x1a7/0x270 [ 30.512396] [] ? splice_direct_to_actor+0x800/0x800 [ 30.519051] [] ? rw_verify_area+0xe5/0x2b0 [ 30.524922] [] do_sendfile+0x54b/0xd30 [ 30.530445] [] ? do_compat_pwritev64+0x100/0x100 [ 30.536836] [] ? __might_fault+0x114/0x1d0 [ 30.542710] [] SyS_sendfile64+0xd1/0x160 [ 30.548405] [] ? SyS_sendfile+0x160/0x160 [ 30.554190] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.561013] [] ? do_syscall_64+0x48/0x490 [ 30.566797] [] ? SyS_sendfile+0x160/0x160 [ 30.572580] [] do_syscall_64+0x1a4/0x490 [ 30.578276] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 30.585657] Dumping ftrace buffer: [ 30.589226] (ftrace buffer empty) [ 30.592906] Kernel Offset: disabled [ 30.596507] Rebooting in 86400 seconds..