[....] Starting enhanced syslogd: rsyslogd[ 10.836282] audit: type=1400 audit(1513654490.203:5): avc: denied { syslog } for pid=2987 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 17.038086] audit: type=1400 audit(1513654496.404:6): avc: denied { map } for pid=3127 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-6,10.128.0.22' (ECDSA) to the list of known hosts. executing program [ 36.704891] audit: type=1400 audit(1513654516.071:7): avc: denied { map } for pid=3145 comm="syzkaller465130" path="/root/syzkaller465130132" 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 [ 36.712941] device syz0 entered promiscuous mode [ 36.754611] ------------[ cut here ]------------ [ 36.761785] syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=56 data_len=0 gso_size=3 gso_type=18 ip_summed=0 [ 36.776706] WARNING: CPU: 1 PID: 3145 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 [ 36.789530] Kernel panic - not syncing: panic_on_warn set ... [ 36.789530] [ 36.799899] CPU: 1 PID: 3145 Comm: syzkaller465130 Not tainted 4.15.0-rc4+ #228 [ 36.810724] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.823870] Call Trace: [ 36.827601] dump_stack+0x194/0x257 [ 36.832746] ? arch_local_irq_restore+0x53/0x53 [ 36.839536] ? vsnprintf+0x1ed/0x1900 [ 36.844623] panic+0x1e4/0x41c [ 36.849542] ? refcount_error_report+0x214/0x214 [ 36.855865] ? show_regs_print_info+0x18/0x18 [ 36.862673] ? __warn+0x1c1/0x200 [ 36.867601] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 36.873953] __warn+0x1dc/0x200 [ 36.878838] ? console_unlock+0x983/0xd80 [ 36.884434] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 36.891065] report_bug+0x211/0x2d0 [ 36.895852] fixup_bug.part.11+0x37/0x80 [ 36.901924] do_error_trap+0x2d7/0x3e0 [ 36.907093] ? __down_trylock_console_sem+0x10d/0x1e0 [ 36.914433] ? math_error+0x400/0x400 [ 36.919968] ? vprintk_emit+0x3ea/0x590 [ 36.925509] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.932649] do_invalid_op+0x1b/0x20 [ 36.937893] invalid_op+0x22/0x40 [ 36.942903] RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 [ 36.950708] RSP: 0018:ffff8801c93cf0f8 EFLAGS: 00010286 [ 36.958120] RAX: dffffc0000000008 RBX: ffff8801bd0802c0 RCX: ffffffff8159a86e [ 36.968567] RDX: 0000000000000000 RSI: 1ffff10039279dda RDI: ffff8801c93cee00 [ 36.978835] RBP: ffff8801c93cf150 R08: 1ffff10039279d9c R09: 0000000000000000 [ 36.989140] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 36.999809] R13: ffff8801bd0802c0 R14: ffff8801cab8b660 R15: 0000000000000012 [ 37.010525] ? vprintk_func+0x5e/0xc0 [ 37.015507] ? skb_warn_bad_offload+0x2bd/0x3c0 [ 37.022459] __skb_gso_segment+0x612/0x800 [ 37.028565] ? skb_mac_gso_segment+0x660/0x660 [ 37.034704] ? sch_direct_xmit+0xc0/0x6d0 [ 37.040992] validate_xmit_skb+0x4ba/0xb20 [ 37.046829] ? netif_skb_features+0x8e0/0x8e0 [ 37.053155] ? do_raw_spin_trylock+0x190/0x190 [ 37.059798] ? lock_acquire+0x1d5/0x580 [ 37.065042] ? __dev_queue_xmit+0x8ba/0x2070 [ 37.071735] validate_xmit_skb_list+0xb7/0x120 [ 37.077940] sch_direct_xmit+0x3b6/0x6d0 [ 37.083608] ? dev_deactivate_queue.constprop.29+0x260/0x260 [ 37.091921] __dev_queue_xmit+0x16f4/0x2070 [ 37.097857] ? netdev_pick_tx+0x300/0x300 [ 37.103606] ? lock_release+0xa40/0xa40 [ 37.109520] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 37.117583] ? refcount_add+0x24/0x60 [ 37.122885] ? skb_set_owner_w+0x232/0x330 [ 37.129007] ? __might_sleep+0x95/0x190 [ 37.134435] ? kasan_check_write+0x14/0x20 [ 37.140702] ? copyin+0x91/0xb0 [ 37.144959] ? _copy_from_iter+0x367/0xf30 [ 37.151142] ? __check_object_size+0x25d/0x4f0 [ 37.157572] ? check_stack_object+0x140/0x140 [ 37.163775] ? copy_page_to_iter+0xe10/0xe10 [ 37.170052] ? _copy_from_iter_full+0x22b/0xbb0 [ 37.176559] ? skb_copy_datagram_from_iter+0x3a5/0x5a0 [ 37.183945] ? iov_iter_advance+0x13f0/0x13f0 [ 37.190710] ? _cond_resched+0x14/0x30 [ 37.195846] dev_queue_xmit+0x17/0x20 [ 37.201658] packet_sendmsg+0x3ab1/0x6060 [ 37.207080] ? find_held_lock+0x35/0x1d0 [ 37.212975] ? lock_downgrade+0x980/0x980 [ 37.218928] ? packet_cached_dev_get+0x2b0/0x2b0 [ 37.225484] ? avc_has_perm+0x43e/0x680 [ 37.231466] ? avc_has_perm_noaudit+0x520/0x520 [ 37.237753] ? _raw_spin_unlock_irq+0x27/0x70 [ 37.243959] ? locks_remove_posix+0x510/0x800 [ 37.250798] ? find_held_lock+0x35/0x1d0 [ 37.256103] ? avc_has_perm+0x35e/0x680 [ 37.261994] ? sock_has_perm+0x29c/0x400 [ 37.267605] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 37.274866] ? lock_downgrade+0x980/0x980 [ 37.280985] ? security_socket_sendmsg+0x89/0xb0 [ 37.287575] ? packet_cached_dev_get+0x2b0/0x2b0 [ 37.294038] sock_sendmsg+0xca/0x110 [ 37.299697] sock_write_iter+0x31a/0x5d0 [ 37.304865] ? sock_sendmsg+0x110/0x110 [ 37.310884] ? iov_iter_init+0xaf/0x1d0 [ 37.316103] __vfs_write+0x684/0x970 [ 37.321821] ? kernel_read+0x120/0x120 [ 37.326990] ? bpf_fd_pass+0x280/0x280 [ 37.332801] ? _cond_resched+0x14/0x30 [ 37.338554] ? selinux_file_permission+0x82/0x460 [ 37.344964] ? rw_verify_area+0xe5/0x2b0 [ 37.350960] ? __fdget_raw+0x20/0x20 [ 37.355835] vfs_write+0x189/0x510 [ 37.361140] SyS_write+0xef/0x220 [ 37.365834] ? SyS_read+0x220/0x220 [ 37.371459] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.378555] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.384868] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 37.391907] RIP: 0033:0x4442c9 [ 37.396000] RSP: 002b:00007ffcdfdf5cb8 EFLAGS: 00000297 ORIG_RAX: 0000000000000001 [ 37.406988] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004442c9 [ 37.417565] RDX: 0000000000000042 RSI: 00000000204f0000 RDI: 0000000000000005 [ 37.427831] RBP: 00000000006ce018 R08: 00007ffcdfdf5e38 R09: 00007ffc00001e32 [ 37.437921] R10: 000000000000000f R11: 0000000000000297 R12: 0000000000401fb0 [ 37.448097] R13: 0000000000402040 R14: 0000000000000000 R15: 0000000000000000 [ 37.457094] Dumping ftrace buffer: [ 37.460660] (ftrace buffer empty) [ 37.464342] Kernel Offset: disabled [ 37.467943] Rebooting in 86400 seconds..