[....] Starting enhanced syslogd: rsyslogd[ 12.174720] audit: type=1400 audit(1516034105.738:5): avc: denied { syslog } for pid=3503 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: [ 18.891374] audit: type=1400 audit(1516034112.455:6): avc: denied { map } for pid=3644 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 '10.128.15.194' (ECDSA) to the list of known hosts. executing program [ 31.361153] audit: type=1400 audit(1516034124.924:7): avc: denied { map } for pid=3660 comm="syzkaller981242" path="/root/syzkaller981242345" 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 [ 31.387303] device eql entered promiscuous mode [ 31.393790] ------------[ cut here ]------------ [ 31.398586] PF_CAN: dropped non conform CAN skbuf: dev type 65534, len 42, datalen 0 [ 31.406606] WARNING: CPU: 0 PID: 3661 at net/can/af_can.c:729 can_rcv+0x1c5/0x200 [ 31.414206] Kernel panic - not syncing: panic_on_warn set ... [ 31.414206] [ 31.421546] CPU: 0 PID: 3661 Comm: syzkaller981242 Not tainted 4.15.0-rc7-mm1+ #56 [ 31.429222] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.438554] Call Trace: [ 31.441121] dump_stack+0x194/0x257 [ 31.444726] ? arch_local_irq_restore+0x53/0x53 [ 31.449376] ? vsnprintf+0x1ed/0x1900 [ 31.453153] panic+0x1e4/0x41c [ 31.456319] ? refcount_error_report+0x214/0x214 [ 31.461046] ? show_regs_print_info+0x18/0x18 [ 31.465540] ? __warn+0x1c1/0x200 [ 31.468969] ? can_rcv+0x1c5/0x200 [ 31.472485] __warn+0x1dc/0x200 [ 31.475738] ? console_unlock+0x978/0xd70 [ 31.479859] ? can_rcv+0x1c5/0x200 [ 31.483376] report_bug+0x211/0x2d0 [ 31.486983] fixup_bug.part.11+0x37/0x80 [ 31.491019] do_error_trap+0x2d7/0x3e0 [ 31.494891] ? __down_trylock_console_sem+0x10d/0x1e0 [ 31.500057] ? math_error+0x400/0x400 [ 31.503832] ? vprintk_emit+0x3ea/0x590 [ 31.507790] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.512613] do_invalid_op+0x1b/0x20 [ 31.516302] invalid_op+0x22/0x40 [ 31.519728] RIP: 0010:can_rcv+0x1c5/0x200 [ 31.523846] RSP: 0018:ffff8801bb137028 EFLAGS: 00010286 [ 31.529182] RAX: dffffc0000000008 RBX: ffff8801d9bdae40 RCX: ffffffff815a58fe [ 31.536426] RDX: 0000000000000000 RSI: ffff8801c5126e38 RDI: 1ffff10037626dc0 [ 31.543678] RBP: ffff8801bb137050 R08: 0000000000000000 R09: 0000000000000000 [ 31.550920] R10: ffff8801bb137570 R11: 0000000000000000 R12: ffff8801d9628340 [ 31.558163] R13: ffff8801d9bd95c0 R14: 000000000000fffe R15: ffffffff87055080 [ 31.565417] ? vprintk_func+0x5e/0xc0 [ 31.569195] ? can_rcv+0x1c5/0x200 [ 31.572721] ? can_receive+0x4d0/0x4d0 [ 31.576586] __netif_receive_skb_core+0x1a41/0x3460 [ 31.581585] ? nf_ingress+0x9f0/0x9f0 [ 31.585365] ? check_noncircular+0x20/0x20 [ 31.589575] ? __skb_flow_dissect+0x49a/0x3f90 [ 31.594140] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 31.599332] ? __skb_flow_get_ports+0x420/0x420 [ 31.603980] ? check_noncircular+0x20/0x20 [ 31.608288] ? __lock_is_held+0xb6/0x140 [ 31.612406] ? lock_downgrade+0x980/0x980 [ 31.616549] ? find_held_lock+0x35/0x1d0 [ 31.620592] ? find_held_lock+0x35/0x1d0 [ 31.624634] ? netif_receive_skb_internal+0x1d7/0x670 [ 31.629800] ? lock_downgrade+0x980/0x980 [ 31.633931] ? pvclock_read_flags+0x160/0x160 [ 31.638429] ? lock_acquire+0x1d5/0x580 [ 31.642394] ? lock_acquire+0x1d5/0x580 [ 31.646339] ? netif_receive_skb_internal+0xa2/0x670 [ 31.651428] ? ktime_get_with_offset+0x2c1/0x420 [ 31.656162] ? lock_release+0xa40/0xa40 [ 31.660105] ? do_gettimeofday+0x190/0x190 [ 31.664331] ? debug_object_fixup+0x30/0x30 [ 31.668628] ? find_held_lock+0x35/0x1d0 [ 31.672668] __netif_receive_skb+0x2c/0x1b0 [ 31.676963] ? __netif_receive_skb+0x2c/0x1b0 [ 31.681436] netif_receive_skb_internal+0x10b/0x670 [ 31.686428] ? dev_cpu_dead+0xb00/0xb00 [ 31.690383] ? __do_once_done+0xf2/0x300 [ 31.694420] ? rcu_pm_notify+0xc0/0xc0 [ 31.698295] netif_receive_skb+0xae/0x390 [ 31.702419] ? netif_receive_skb_internal+0x670/0x670 [ 31.707586] ? find_held_lock+0x35/0x1d0 [ 31.711639] ? tun_rx_batched.isra.51+0x5c4/0x870 [ 31.716461] tun_rx_batched.isra.51+0x5ee/0x870 [ 31.721108] ? tun_sock_write_space+0x370/0x370 [ 31.725768] tun_get_user+0x25de/0x3940 [ 31.729719] ? finish_task_switch+0x1d3/0x740 [ 31.734197] ? compat_start_thread+0x10/0x80 [ 31.738583] ? tun_build_skb.isra.49+0x1810/0x1810 [ 31.743487] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.748477] ? trace_hardirqs_on+0xd/0x10 [ 31.752607] ? mmdrop+0x18/0x30 [ 31.755860] ? finish_task_switch+0x1f6/0x740 [ 31.760332] ? copy_overflow+0x20/0x20 [ 31.764204] ? tun_get+0x1ab/0x2e0 [ 31.767734] ? __sched_text_start+0x8/0x8 [ 31.771858] ? lock_release+0xa40/0xa40 [ 31.775807] ? __lock_is_held+0xb6/0x140 [ 31.779864] ? tun_get+0x1d4/0x2e0 [ 31.783396] ? tun_do_read+0x2600/0x2600 [ 31.787441] tun_chr_write_iter+0xb9/0x160 [ 31.791653] __vfs_write+0x684/0x970 [ 31.795353] ? kernel_read+0x120/0x120 [ 31.799219] ? _cond_resched+0x14/0x30 [ 31.803085] ? avc_policy_seqno+0x9/0x20 [ 31.807118] ? selinux_file_permission+0x82/0x460 [ 31.811945] ? rw_verify_area+0xe5/0x2b0 [ 31.815981] ? __fdget_raw+0x20/0x20 [ 31.819669] vfs_write+0x189/0x510 [ 31.823184] SyS_write+0xef/0x220 [ 31.826615] ? SyS_read+0x220/0x220 [ 31.830216] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.835208] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.839946] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 31.844676] RIP: 0033:0x4445d9 [ 31.847839] RSP: 002b:00007ffe8d6095e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000001 [ 31.855526] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004445d9 [ 31.862785] RDX: 000000000000002e RSI: 0000000020b61fd2 RDI: 0000000000000004 [ 31.870032] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.877275] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000006c7165 [ 31.884528] R13: 0000000000401fb0 R14: 0000000000000000 R15: 0000000000000000 [ 31.892302] Dumping ftrace buffer: [ 31.895853] (ftrace buffer empty) [ 31.899538] Kernel Offset: disabled [ 31.903136] Rebooting in 86400 seconds..