[....] Starting enhanced syslogd: rsyslogd[ 11.133563] audit: type=1400 audit(1514189265.818:5): avc: denied { syslog } for pid=2991 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 syzkaller login: [ 15.729096] audit: type=1400 audit(1514189270.413:6): avc: denied { map } for pid=3131 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 Warning: Permanently added 'ci-upstream-kasan-gce-2,10.128.0.51' (ECDSA) to the list of known hosts. executing program [ 21.932159] audit: type=1400 audit(1514189276.616:7): avc: denied { map } for pid=3145 comm="syzkaller273162" path="/root/syzkaller273162341" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 21.941396] device syz0 entered promiscuous mode [ 21.966845] ------------[ cut here ]------------ [ 21.966865] syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=28 data_len=0 gso_size=63464 gso_type=7 ip_summed=0 [ 21.967010] WARNING: CPU: 0 PID: 3145 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 [ 21.967015] Kernel panic - not syncing: panic_on_warn set ... [ 21.967015] [ 21.967022] CPU: 0 PID: 3145 Comm: syzkaller273162 Not tainted 4.15.0-rc5+ #237 [ 21.967026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.967029] Call Trace: [ 21.967040] dump_stack+0x194/0x257 [ 21.967054] ? arch_local_irq_restore+0x53/0x53 [ 21.967071] ? vsnprintf+0x1ed/0x1900 [ 21.967087] panic+0x1e4/0x41c [ 21.967096] ? refcount_error_report+0x214/0x214 [ 21.967104] ? show_regs_print_info+0x18/0x18 [ 21.967124] ? __warn+0x1c1/0x200 [ 21.967138] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 21.967145] __warn+0x1dc/0x200 [ 21.967153] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 21.967166] report_bug+0x211/0x2d0 [ 21.967187] fixup_bug.part.11+0x37/0x80 [ 21.967197] do_error_trap+0x2d7/0x3e0 [ 21.967204] ? __down_trylock_console_sem+0x10d/0x1e0 [ 21.967217] ? math_error+0x400/0x400 [ 21.967225] ? vprintk_emit+0x3ea/0x590 [ 21.967253] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 21.967271] do_invalid_op+0x1b/0x20 [ 21.967279] invalid_op+0x22/0x40 [ 21.967286] RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 [ 21.967290] RSP: 0018:ffff8801ca1bf0d8 EFLAGS: 00010286 [ 21.967298] RAX: dffffc0000000008 RBX: ffff8801c93c02c0 RCX: ffffffff8159b57e [ 21.967302] RDX: 0000000000000000 RSI: 1ffff1003942a5d8 RDI: 0000000000000293 [ 21.967306] RBP: ffff8801ca1bf130 R08: 1ffff10039437dae R09: 0000000000000000 [ 21.967310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 21.967315] R13: ffff8801c93c02c0 R14: ffff8801c9f9fa20 R15: 0000000000000007 [ 21.967334] ? vprintk_func+0x5e/0xc0 [ 21.967351] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 21.967381] __skb_gso_segment+0x612/0x800 [ 21.967394] ? skb_mac_gso_segment+0x660/0x660 [ 21.967412] ? sch_direct_xmit+0xc0/0x6d0 [ 21.967426] validate_xmit_skb+0x4ba/0xb20 [ 21.967442] ? netif_skb_features+0x8e0/0x8e0 [ 21.967457] ? do_raw_spin_trylock+0x190/0x190 [ 21.967465] ? lock_acquire+0x1d5/0x580 [ 21.967472] ? __dev_queue_xmit+0x8ba/0x2070 [ 21.967487] validate_xmit_skb_list+0xb7/0x120 [ 21.967503] sch_direct_xmit+0x3b6/0x6d0 [ 21.967521] ? dev_deactivate_queue.constprop.29+0x260/0x260 [ 21.967548] __dev_queue_xmit+0x16f4/0x2070 [ 21.967572] ? netdev_pick_tx+0x300/0x300 [ 21.967585] ? lock_release+0xa40/0xa40 [ 21.967594] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 21.967604] ? refcount_add+0x24/0x60 [ 21.967615] ? skb_set_owner_w+0x232/0x330 [ 21.967634] ? __might_sleep+0x95/0x190 [ 21.967646] ? kasan_check_write+0x14/0x20 [ 21.967653] ? copyin+0x91/0xb0 [ 21.967668] ? _copy_from_iter+0x367/0xf30 [ 21.967680] ? __check_object_size+0x25d/0x4f0 [ 21.967697] ? check_stack_object+0x140/0x140 [ 21.967713] ? copy_page_to_iter+0xe10/0xe10 [ 21.967725] ? _copy_from_iter_full+0x22b/0xbb0 [ 21.967747] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 21.967756] ? iov_iter_advance+0x13f0/0x13f0 [ 21.967779] dev_queue_xmit+0x17/0x20 [ 21.967790] packet_sendmsg+0x3ad5/0x60a0 [ 21.967804] ? find_held_lock+0x35/0x1d0 [ 21.967827] ? avc_has_perm+0x35e/0x680 [ 21.967867] ? packet_cached_dev_get+0x2b0/0x2b0 [ 21.967873] ? mark_held_locks+0xaf/0x100 [ 21.967891] ? avc_has_perm+0x43e/0x680 [ 21.967908] ? avc_has_perm_noaudit+0x520/0x520 [ 21.967932] ? locks_remove_posix+0x518/0x820 [ 21.967951] ? find_held_lock+0x35/0x1d0 [ 21.967972] ? avc_has_perm+0x35e/0x680 [ 21.967989] ? sock_has_perm+0x2a4/0x420 [ 21.968002] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 21.968043] ? selinux_socket_sendmsg+0x36/0x40 [ 21.968051] ? security_socket_sendmsg+0x89/0xb0 [ 21.968058] ? packet_cached_dev_get+0x2b0/0x2b0 [ 21.968071] sock_sendmsg+0xca/0x110 [ 21.968084] sock_write_iter+0x31a/0x5d0 [ 21.968096] ? sock_sendmsg+0x110/0x110 [ 21.968123] ? iov_iter_init+0xaf/0x1d0 [ 21.968139] __vfs_write+0x684/0x970 [ 21.968154] ? kernel_read+0x120/0x120 [ 21.968160] ? bpf_fd_pass+0x280/0x280 [ 21.968177] ? _cond_resched+0x14/0x30 [ 21.968194] ? selinux_file_permission+0x82/0x460 [ 21.968218] ? rw_verify_area+0xe5/0x2b0 [ 21.968226] ? __fdget_raw+0x20/0x20 [ 21.968238] vfs_write+0x189/0x510 [ 21.968252] SyS_write+0xef/0x220 [ 21.968266] ? SyS_read+0x220/0x220 [ 21.968273] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 21.968285] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 21.968306] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 21.968312] RIP: 0033:0x444199 [ 21.968316] RSP: 002b:00007ffd6c9b2f88 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 21.968324] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444199 [ 21.968328] RDX: 0000000000000026 RSI: 0000000020217f75 RDI: 0000000000000005 [ 21.968333] RBP: 00000000006ce018 R08: 0000000000401e80 R09: 0000000000401e80 [ 21.968337] R10: 0000000000401e80 R11: 0000000000000293 R12: 0000000000401e80 [ 21.968342] R13: 0000000000401f10 R14: 0000000000000000 R15: 0000000000000000 [ 21.969023] Dumping ftrace buffer: [ 21.969055] (ftrace buffer empty) [ 21.969058] Kernel Offset: disabled [ 22.465278] Rebooting in 86400 seconds..