[....] Starting enhanced syslogd: rsyslogd[ 11.857190] audit: type=1400 audit(1516001730.458:5): 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: [ 19.042879] audit: type=1400 audit(1516001737.644:6): avc: denied { map } for pid=3643 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 '10.128.0.18' (ECDSA) to the list of known hosts. [ 39.700599] audit: type=1400 audit(1516001758.302:7): avc: denied { map } for pid=3660 comm="syzkaller656999" path="/root/syzkaller656999174" 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 executing program [ 39.726781] audit: type=1400 audit(1516001758.302:8): avc: denied { sys_admin } for pid=3660 comm="syzkaller656999" 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 [ 39.756515] audit: type=1400 audit(1516001758.358:9): avc: denied { sys_chroot } for pid=3661 comm="syzkaller656999" 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 [ 39.762339] device syz0 entered promiscuous mode [ 39.763160] ------------[ cut here ]------------ [ 39.763164] PF_CAN: dropped non conform CAN FD skbuf: dev type 65534, len 128, datalen 0 [ 39.763286] WARNING: CPU: 0 PID: 3661 at net/can/af_can.c:750 canfd_rcv+0x1c5/0x200 [ 39.763290] Kernel panic - not syncing: panic_on_warn set ... [ 39.763290] [ 39.763295] CPU: 0 PID: 3661 Comm: syzkaller656999 Not tainted 4.15.0-rc7-mm1+ #56 [ 39.763298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.763300] Call Trace: [ 39.763309] dump_stack+0x194/0x257 [ 39.763317] ? arch_local_irq_restore+0x53/0x53 [ 39.763326] ? vsnprintf+0x1ed/0x1900 [ 39.763336] panic+0x1e4/0x41c [ 39.763342] ? refcount_error_report+0x214/0x214 [ 39.763346] ? show_regs_print_info+0x18/0x18 [ 39.763358] ? __warn+0x1c1/0x200 [ 39.763365] ? canfd_rcv+0x1c5/0x200 [ 39.763369] __warn+0x1dc/0x200 [ 39.763374] ? canfd_rcv+0x1c5/0x200 [ 39.763381] report_bug+0x211/0x2d0 [ 39.763391] fixup_bug.part.11+0x37/0x80 [ 39.763396] do_error_trap+0x2d7/0x3e0 [ 39.763401] ? __down_trylock_console_sem+0x10d/0x1e0 [ 39.763409] ? math_error+0x400/0x400 [ 39.763413] ? vprintk_emit+0x3ea/0x590 [ 39.763430] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.763440] do_invalid_op+0x1b/0x20 [ 39.763446] invalid_op+0x22/0x40 [ 39.763450] RIP: 0010:canfd_rcv+0x1c5/0x200 [ 39.763452] RSP: 0018:ffff8801d9bdf028 EFLAGS: 00010286 [ 39.763457] RAX: dffffc0000000008 RBX: ffff8801d99fd800 RCX: ffffffff815a58fe [ 39.763459] RDX: 0000000000000000 RSI: ffff8801bcf44c38 RDI: 0000000000000293 [ 39.763461] RBP: ffff8801d9bdf050 R08: 0000000000000000 R09: 0000000000000000 [ 39.763464] R10: ffff8801d9bdf570 R11: 0000000000000000 R12: ffff8801bc5a8340 [ 39.763466] R13: ffff8801d99fc600 R14: 000000000000fffe R15: ffffffff87055040 [ 39.763477] ? vprintk_func+0x5e/0xc0 [ 39.763487] ? canfd_rcv+0x1c5/0x200 [ 39.763491] ? can_rcv+0x200/0x200 [ 39.763500] __netif_receive_skb_core+0x1a41/0x3460 [ 39.763513] ? nf_ingress+0x9f0/0x9f0 [ 39.763518] ? check_noncircular+0x20/0x20 [ 39.763525] ? __skb_flow_dissect+0x49a/0x3f90 [ 39.763538] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 39.763556] ? __skb_flow_get_ports+0x420/0x420 [ 39.763564] ? check_noncircular+0x20/0x20 [ 39.763570] ? __lock_is_held+0xb6/0x140 [ 39.763574] ? lock_downgrade+0x980/0x980 [ 39.763588] ? find_held_lock+0x35/0x1d0 [ 39.763599] ? find_held_lock+0x35/0x1d0 [ 39.763611] ? netif_receive_skb_internal+0x1d7/0x670 [ 39.763617] ? lock_downgrade+0x980/0x980 [ 39.763633] ? pvclock_read_flags+0x160/0x160 [ 39.763644] ? lock_acquire+0x1d5/0x580 [ 39.763648] ? lock_acquire+0x1d5/0x580 [ 39.763653] ? netif_receive_skb_internal+0xa2/0x670 [ 39.763660] ? ktime_get_with_offset+0x2c1/0x420 [ 39.763669] ? lock_release+0xa40/0xa40 [ 39.763673] ? do_gettimeofday+0x190/0x190 [ 39.763682] ? debug_object_fixup+0x30/0x30 [ 39.763686] ? find_held_lock+0x35/0x1d0 [ 39.763696] __netif_receive_skb+0x2c/0x1b0 [ 39.763700] ? __netif_receive_skb+0x2c/0x1b0 [ 39.763708] netif_receive_skb_internal+0x10b/0x670 [ 39.763714] ? dev_cpu_dead+0xb00/0xb00 [ 39.763723] ? __do_once_done+0xf2/0x300 [ 39.763730] ? rcu_pm_notify+0xc0/0xc0 [ 39.763747] netif_receive_skb+0xae/0x390 [ 39.763753] ? netif_receive_skb_internal+0x670/0x670 [ 39.763762] ? find_held_lock+0x35/0x1d0 [ 39.763773] ? tun_rx_batched.isra.51+0x5c4/0x870 [ 39.763782] tun_rx_batched.isra.51+0x5ee/0x870 [ 39.763792] ? tun_sock_write_space+0x370/0x370 [ 39.763812] tun_get_user+0x25de/0x3940 [ 39.763819] ? finish_task_switch+0x1d3/0x740 [ 39.763835] ? compat_start_thread+0x10/0x80 [ 39.763845] ? tun_build_skb.isra.49+0x1810/0x1810 [ 39.763852] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.763858] ? trace_hardirqs_on+0xd/0x10 [ 39.763863] ? mmdrop+0x18/0x30 [ 39.763868] ? finish_task_switch+0x1f6/0x740 [ 39.763876] ? copy_overflow+0x20/0x20 [ 39.763896] ? tun_get+0x1ab/0x2e0 [ 39.763903] ? __sched_text_start+0x8/0x8 [ 39.763910] ? lock_release+0xa40/0xa40 [ 39.763918] ? __lock_is_held+0xb6/0x140 [ 39.763934] ? tun_get+0x1d4/0x2e0 [ 39.763939] ? tun_do_read+0x2600/0x2600 [ 39.763953] tun_chr_write_iter+0xb9/0x160 [ 39.763961] __vfs_write+0x684/0x970 [ 39.763969] ? kernel_read+0x120/0x120 [ 39.763978] ? _cond_resched+0x14/0x30 [ 39.763986] ? avc_policy_seqno+0x9/0x20 [ 39.763991] ? selinux_file_permission+0x82/0x460 [ 39.764007] ? rw_verify_area+0xe5/0x2b0 [ 39.764011] ? __fdget_raw+0x20/0x20 [ 39.764019] vfs_write+0x189/0x510 [ 39.764028] SyS_write+0xef/0x220 [ 39.764035] ? SyS_read+0x220/0x220 [ 39.764039] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.764045] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.764056] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 39.764060] RIP: 0033:0x444b49 [ 39.764062] RSP: 002b:00000000007eff38 EFLAGS: 00000297 ORIG_RAX: 0000000000000001 [ 39.764066] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000444b49 [ 39.764068] RDX: 0000000000000084 RSI: 0000000020ab08cd RDI: 0000000000000005 [ 39.764070] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 39.764073] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000402740 [ 39.764075] R13: 00000000004027d0 R14: 0000000000000000 R15: 0000000000000000 [ 39.780994] Dumping ftrace buffer: [ 39.781039] (ftrace buffer empty) [ 39.781042] Kernel Offset: disabled [ 40.289717] Rebooting in 86400 seconds..