[....] Starting enhanced syslogd: rsyslogd[ 17.031637] audit: type=1400 audit(1517935262.674:5): avc: denied { syslog } for pid=3978 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: [ 22.128579] audit: type=1400 audit(1517935267.771:6): avc: denied { map } for pid=4119 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 '10.128.0.33' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 28.503679] audit: type=1400 audit(1517935274.146:7): avc: denied { map } for pid=4134 comm="syzkaller993072" path="/root/syzkaller993072963" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 28.892709] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 29.232051] WARNING: CPU: 1 PID: 4134 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 29.240036] Kernel panic - not syncing: panic_on_warn set ... [ 29.240036] [ 29.247380] CPU: 1 PID: 4134 Comm: syzkaller993072 Not tainted 4.15.0+ #221 [ 29.254447] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.263771] Call Trace: [ 29.266333] dump_stack+0x194/0x257 [ 29.269941] ? arch_local_irq_restore+0x53/0x53 [ 29.274585] ? vsnprintf+0x1ed/0x1900 [ 29.278363] panic+0x1e4/0x41c [ 29.281529] ? refcount_error_report+0x214/0x214 [ 29.286257] ? show_regs_print_info+0x18/0x18 [ 29.290724] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.295713] ? __warn+0x1c1/0x200 [ 29.299141] ? kmalloc_slab+0x5d/0x70 [ 29.302914] __warn+0x1dc/0x200 [ 29.306177] ? kmalloc_slab+0x5d/0x70 [ 29.309952] report_bug+0x211/0x2d0 [ 29.313559] fixup_bug.part.11+0x37/0x80 [ 29.317593] do_error_trap+0x2d7/0x3e0 [ 29.321457] ? netlink_sendmsg+0xa4a/0xe60 [ 29.325667] ? sock_sendmsg+0xca/0x110 [ 29.329524] ? ___sys_sendmsg+0x767/0x8b0 [ 29.333645] ? math_error+0x400/0x400 [ 29.337417] ? find_held_lock+0x35/0x1d0 [ 29.341451] ? print_irqtrace_events+0x270/0x270 [ 29.346184] ? check_noncircular+0x20/0x20 [ 29.350391] ? __lock_is_held+0xb6/0x140 [ 29.354429] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.359251] do_invalid_op+0x1b/0x20 [ 29.362940] invalid_op+0x22/0x40 [ 29.366364] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 29.370738] RSP: 0018:ffff8801ba7ceb20 EFLAGS: 00010246 [ 29.376075] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83b88bed [ 29.383314] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000400000008 [ 29.390553] RBP: ffff8801ba7ceb20 R08: 1ffff100374f9cd7 R09: 0000000000000000 [ 29.397792] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000400000008 [ 29.405036] R13: dffffc0000000000 R14: 00000000014080c0 R15: ffff8801b5d52080 [ 29.412290] ? tun_device_event+0x45d/0xec0 [ 29.416590] __kmalloc+0x25/0x760 [ 29.420031] ? tun_device_event+0x471/0xec0 [ 29.424336] tun_device_event+0x471/0xec0 [ 29.428455] ? dev_map_notification+0x9a/0x600 [ 29.433029] ? inetdev_init+0x530/0x530 [ 29.436979] ? bond_open+0xe20/0xe20 [ 29.440665] ? sel_netif_netdev_notifier_handler+0x86/0x420 [ 29.446345] ? igmp_netdev_event+0x87/0x760 [ 29.450643] ? tun_net_xmit+0x19e0/0x19e0 [ 29.454771] ? lockdep_rtnl_is_held+0x1a/0x30 [ 29.459239] ? fib_netdev_event+0xf0/0x300 [ 29.463450] notifier_call_chain+0x136/0x2c0 [ 29.467837] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 29.473266] ? rtnl_is_locked+0x54/0xb0 [ 29.477211] ? rtnl_kfree_skbs+0x70/0x70 [ 29.481251] raw_notifier_call_chain+0x2d/0x40 [ 29.485809] call_netdevice_notifiers_info+0x32/0x70 [ 29.490885] dev_change_tx_queue_len+0x117/0x220 [ 29.495611] ? __lock_acquire+0x664/0x3e00 [ 29.499819] ? dev_change_flags+0x140/0x140 [ 29.504117] ? print_irqtrace_events+0x270/0x270 [ 29.508847] do_setlink+0xba7/0x3bb0 [ 29.512534] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.517695] ? __lock_acquire+0x664/0x3e00 [ 29.521909] ? rtnl_fdb_del+0xb20/0xb20 [ 29.525859] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.531030] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 29.536206] ? print_irqtrace_events+0x270/0x270 [ 29.540932] ? print_irqtrace_events+0x270/0x270 [ 29.545661] ? lock_downgrade+0x980/0x980 [ 29.549783] ? check_noncircular+0x20/0x20 [ 29.553994] ? print_irqtrace_events+0x270/0x270 [ 29.558727] ? print_irqtrace_events+0x270/0x270 [ 29.563455] ? __lock_acquire+0x664/0x3e00 [ 29.567665] ? check_noncircular+0x20/0x20 [ 29.571875] ? rtnl_is_locked+0x54/0xb0 [ 29.575822] ? validate_linkmsg+0x5f0/0x8e0 [ 29.580119] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 29.584676] ? netdev_master_upper_dev_get+0x15b/0x220 [ 29.589924] ? __dev_get_by_flags+0x1a0/0x1a0 [ 29.594399] rtnl_newlink+0xf1c/0x1a20 [ 29.598265] ? __mutex_lock+0x16f/0x1a80 [ 29.602310] ? rtnl_link_unregister+0x330/0x330 [ 29.606951] ? avc_has_perm_noaudit+0x37e/0x520 [ 29.611596] ? avc_has_extended_perms+0x12c0/0x12c0 [ 29.616583] ? rcutorture_record_progress+0x10/0x10 [ 29.621618] ? rtnl_get_link+0x124/0x2b0 [ 29.625651] ? rtnl_dump_all+0x460/0x460 [ 29.629688] ? ns_capable_common+0xcf/0x160 [ 29.633994] rtnetlink_rcv_msg+0x57f/0xb10 [ 29.638210] ? rtnl_link_unregister+0x330/0x330 [ 29.642850] ? validate_linkmsg+0x8e0/0x8e0 [ 29.647149] ? __might_fault+0x110/0x1d0 [ 29.651191] netlink_rcv_skb+0x14b/0x380 [ 29.655225] ? validate_linkmsg+0x8e0/0x8e0 [ 29.659522] ? netlink_ack+0xa10/0xa10 [ 29.663392] ? netlink_skb_destructor+0x1d0/0x1d0 [ 29.668218] rtnetlink_rcv+0x1c/0x20 [ 29.671907] netlink_unicast+0x4c4/0x6b0 [ 29.675946] ? netlink_attachskb+0x8a0/0x8a0 [ 29.680332] ? security_netlink_send+0x81/0xb0 [ 29.684889] netlink_sendmsg+0xa4a/0xe60 [ 29.688931] ? netlink_unicast+0x6b0/0x6b0 [ 29.693141] ? security_socket_sendmsg+0x89/0xb0 [ 29.697870] ? netlink_unicast+0x6b0/0x6b0 [ 29.702079] sock_sendmsg+0xca/0x110 [ 29.705767] ___sys_sendmsg+0x767/0x8b0 [ 29.709716] ? copy_msghdr_from_user+0x590/0x590 [ 29.714462] ? __do_page_fault+0x5f7/0xc90 [ 29.718670] ? lock_downgrade+0x980/0x980 [ 29.722794] ? __fget_light+0x297/0x380 [ 29.726739] ? fget_raw+0x20/0x20 [ 29.730164] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.734717] ? vmacache_find+0x5f/0x280 [ 29.738670] ? up_read+0x1a/0x40 [ 29.742012] ? __do_page_fault+0x3d6/0xc90 [ 29.746226] ? get_unused_fd_flags+0x190/0x190 [ 29.750785] ? __fdget+0x18/0x20 [ 29.754129] __sys_sendmsg+0xe5/0x210 [ 29.757900] ? __sys_sendmsg+0xe5/0x210 [ 29.761846] ? SyS_shutdown+0x290/0x290 [ 29.765793] ? __do_page_fault+0xc90/0xc90 [ 29.770004] ? fd_install+0x4d/0x60 [ 29.773621] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.778614] SyS_sendmsg+0x2d/0x50 [ 29.782130] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.786857] RIP: 0033:0x4463c9 [ 29.790024] RSP: 002b:00007ffe63916e68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.797706] RAX: ffffffffffffffda RBX: 00000000004a7af2 RCX: 00000000004463c9 [ 29.804946] RDX: 0000000000000000 RSI: 0000000020504000 RDI: 0000000000000004 [ 29.812187] RBP: 00007ffe63916f08 R08: 0000000000000000 R09: 00000000004a7af2 [ 29.819430] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe63916f08 [ 29.826668] R13: 0000000000403890 R14: 0000000000000000 R15: 0000000000000000 [ 29.834629] Dumping ftrace buffer: [ 29.838275] (ftrace buffer empty) [ 29.841958] Kernel Offset: disabled [ 29.845558] Rebooting in 86400 seconds..