[....] Starting enhanced syslogd: rsyslogd[ 12.553470] audit: type=1400 audit(1519462168.796:4): avc: denied { syslog } for pid=3646 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] 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 Warning: Permanently added '10.128.15.199' (ECDSA) to the list of known hosts. 2018/02/24 08:49:37 parsed 1 programs 2018/02/24 08:49:37 executed programs: 0 syzkaller login: [ 21.005501] audit: type=1400 audit(1519462177.246:5): avc: denied { sys_admin } for pid=3801 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 [ 21.037048] IPVS: Creating netns size=2536 id=1 [ 21.046579] audit: type=1400 audit(1519462177.286:6): avc: denied { net_admin } for pid=3806 comm="syz-executor5" 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 [ 21.071617] IPVS: Creating netns size=2536 id=2 [ 21.097473] IPVS: Creating netns size=2536 id=3 [ 21.125078] IPVS: Creating netns size=2536 id=4 [ 21.148845] IPVS: Creating netns size=2536 id=5 [ 21.176752] IPVS: Creating netns size=2536 id=6 [ 21.226625] IPVS: Creating netns size=2536 id=7 [ 21.273955] IPVS: Creating netns size=2536 id=8 [ 21.597044] ip (4101) used greatest stack depth: 24048 bytes left [ 23.150311] audit: type=1400 audit(1519462179.396:7): avc: denied { sys_chroot } for pid=3806 comm="syz-executor5" 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 [ 23.207333] audit: type=1400 audit(1519462179.446:8): avc: denied { net_raw } for pid=4992 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 [ 23.208335] ------------[ cut here ]------------ [ 23.208339] kernel BUG at ./include/linux/skbuff.h:1935! [ 23.208344] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 23.208348] Dumping ftrace buffer: [ 23.208352] (ftrace buffer empty) [ 23.208356] Modules linked in: [ 23.208362] CPU: 1 PID: 5000 Comm: syz-executor6 Not tainted 4.9.83-g72766d7 #50 [ 23.208366] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.208370] task: ffff8801cb256000 task.stack: ffff8801b3508000 [ 23.208384] RIP: 0010:[] [] __ip6_make_skb+0x121c/0x1c20 [ 23.208387] RSP: 0018:ffff8801b350f410 EFLAGS: 00010293 [ 23.208391] RAX: ffff8801cb256000 RBX: 0000000000000738 RCX: ffffffff8342a7bc [ 23.208395] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c75084e0 [ 23.208398] RBP: ffff8801b350f630 R08: ffff8801cc2a47f8 R09: 0000000000000000 [ 23.208402] R10: 0000000000001100 R11: ffffed00390bb131 R12: 00000000000000d6 [ 23.208406] R13: ffff8801cc2a4780 R14: ffff8801cc2a47fc R15: ffff8801c7508000 [ 23.208411] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7746b40 [ 23.208415] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.208419] CR2: 00007ffeecd14b18 CR3: 00000001bdc0c000 CR4: 0000000000160670 [ 23.208425] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.208429] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.208430] Stack: [ 23.208440] ffff8801cc2a4988 ffff8801cc2a483c ffff8801cc2a4850 ffff8801cc2a4848 [ 23.208449] ffff8801c85df4c8 1ffff100366a1e94 ffff8801bb470c40 ffff8801b4b14ea0 [ 23.208458] ffff8801c7508012 ffff8801c7508540 ffff8801bc909a40 ffff8801cc2a4808 [ 23.208459] Call Trace: [ 23.208468] [] ? ip6_output+0x6a0/0x6a0 [ 23.208477] [] ? __ip6_append_data.isra.43+0xc18/0x3370 [ 23.208485] [] ? sock_wmalloc+0xe0/0xe0 [ 23.208494] [] ? __udpv6_queue_rcv_skb+0x3b0/0x3b0 [ 23.208502] [] ? ip6_setup_cork+0x1270/0x1270 [ 23.208509] [] udp_v6_push_pending_frames+0x20a/0x340 [ 23.208516] [] ? udpv6_destroy_sock+0xd0/0xd0 [ 23.208523] [] ? __udpv6_queue_rcv_skb+0x3b0/0x3b0 [ 23.208530] [] udpv6_sendmsg+0x1f38/0x2540 [ 23.208537] [] ? __udpv6_queue_rcv_skb+0x3b0/0x3b0 [ 23.208544] [] ? udp_v6_rehash+0xa0/0xa0 [ 23.208555] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 23.208563] [] ? sock_has_perm+0x1c2/0x3e0 [ 23.208570] [] ? sock_has_perm+0x292/0x3e0 [ 23.208576] [] ? sock_has_perm+0x9f/0x3e0 [ 23.208584] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 23.208593] [] ? check_preemption_disabled+0x3b/0x200 [ 23.208601] [] ? inet_sendmsg+0x201/0x4c0 [ 23.208608] [] inet_sendmsg+0x2bc/0x4c0 [ 23.208615] [] ? inet_sendmsg+0x73/0x4c0 [ 23.208622] [] ? inet_recvmsg+0x4c0/0x4c0 [ 23.208630] [] sock_sendmsg+0xca/0x110 [ 23.208636] [] ___sys_sendmsg+0x320/0x7e0 [ 23.208643] [] ? copy_msghdr_from_user+0x570/0x570 [ 23.208651] [] ? wake_up_q+0x8a/0xe0 [ 23.208661] [] ? drop_futex_key_refs.isra.11+0x63/0xd0 [ 23.208669] [] ? check_preemption_disabled+0x3b/0x200 [ 23.208676] [] ? __fget+0x20a/0x3b0 [ 23.208682] [] ? __fget+0x231/0x3b0 [ 23.208688] [] ? __fget+0x47/0x3b0 [ 23.208694] [] ? __fdget+0x18/0x20 [ 23.208701] [] __sys_sendmmsg+0x234/0x3a0 [ 23.208706] [] ? SyS_sendmsg+0x50/0x50 [ 23.208713] [] ? __fget_light+0x169/0x1f0 [ 23.208719] [] ? __fdget+0x18/0x20 [ 23.208726] [] ? sockfd_lookup_light+0x118/0x160 [ 23.208734] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 23.208746] [] ? fd_install+0x4d/0x60 [ 23.208753] [] ? compat_SyS_get_robust_list+0x300/0x300 [ 23.208759] [] ? move_addr_to_kernel+0x50/0x50 [ 23.208768] [] compat_SyS_sendmmsg+0x32/0x40 [ 23.208775] [] ? compat_SyS_sendmsg+0x40/0x40 [ 23.208783] [] do_fast_syscall_32+0x2f5/0x870 [ 23.208789] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.208798] [] entry_SYSENTER_compat+0x90/0xa2 [ 23.208901] Code: 08 84 c9 0f 85 9f 08 00 00 41 3b 45 7c 72 17 e8 7b 0c f4 fd 45 89 e6 4d 01 f7 4d 89 bd d0 00 00 00 e9 0d f2 ff ff e8 64 0c f4 fd <0f> 0b e8 5d 0c f4 fd 48 8b 7c 24 50 e8 c3 cd fe ff 41 89 c4 e9 [ 23.208908] RIP [] __ip6_make_skb+0x121c/0x1c20 [ 23.208910] RSP [ 23.208917] ---[ end trace 9f7393f634462f4c ]--- [ 23.208921] Kernel panic - not syncing: Fatal exception [ 23.209347] Dumping ftrace buffer: [ 23.209350] (ftrace buffer empty) [ 23.209352] Kernel Offset: disabled