[....] Starting enhanced syslogd: rsyslogd[ 13.113370] audit: type=1400 audit(1516802122.627:5): avc: denied { syslog } for pid=3508 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: [ 17.619947] audit: type=1400 audit(1516802127.133:6): avc: denied { map } for pid=3647 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 '10.128.0.61' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 23.962305] audit: type=1400 audit(1516802133.475:7): avc: denied { map } for pid=3662 comm="syzkaller091425" path="/root/syzkaller091425941" 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 [ 24.351480] 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 [ 24.684443] WARNING: CPU: 0 PID: 3662 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 24.692340] Kernel panic - not syncing: panic_on_warn set ... [ 24.692340] [ 24.699687] CPU: 0 PID: 3662 Comm: syzkaller091425 Not tainted 4.15.0-rc9+ #277 [ 24.707102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.716435] Call Trace: [ 24.718998] dump_stack+0x194/0x257 [ 24.722605] ? arch_local_irq_restore+0x53/0x53 [ 24.727250] ? vsnprintf+0x1ed/0x1900 [ 24.731033] panic+0x1e4/0x41c [ 24.734202] ? refcount_error_report+0x214/0x214 [ 24.738931] ? show_regs_print_info+0x18/0x18 [ 24.743401] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.748391] ? __warn+0x1c1/0x200 [ 24.751821] ? kmalloc_slab+0x5d/0x70 [ 24.755596] __warn+0x1dc/0x200 [ 24.758849] ? kmalloc_slab+0x5d/0x70 [ 24.762622] report_bug+0x211/0x2d0 [ 24.766227] fixup_bug.part.11+0x37/0x80 [ 24.770273] do_error_trap+0x2d7/0x3e0 [ 24.774148] ? netlink_sendmsg+0xa4a/0xe60 [ 24.778356] ? sock_sendmsg+0xca/0x110 [ 24.782226] ? ___sys_sendmsg+0x767/0x8b0 [ 24.786352] ? math_error+0x400/0x400 [ 24.790125] ? check_noncircular+0x20/0x20 [ 24.794334] ? print_irqtrace_events+0x270/0x270 [ 24.799074] ? __lock_is_held+0xb6/0x140 [ 24.803111] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.807940] do_invalid_op+0x1b/0x20 [ 24.811625] invalid_op+0x22/0x40 [ 24.815052] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 24.819429] RSP: 0018:ffff8801bc1fe940 EFLAGS: 00010246 [ 24.824776] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 24.832021] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 24.839265] RBP: ffff8801bc1fe940 R08: 1ffff1003783fc9b R09: 0000000000000000 [ 24.846508] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 24.853750] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d4bc6040 [ 24.861005] ? tun_device_event+0x3bf/0xcb0 [ 24.865314] __kmalloc+0x25/0x760 [ 24.868747] ? tun_device_event+0x3d3/0xcb0 [ 24.873049] tun_device_event+0x3d3/0xcb0 [ 24.877169] ? sel_netif_destroy+0x250/0x250 [ 24.881561] ? lockdep_rtnl_is_held+0x1a/0x30 [ 24.886039] notifier_call_chain+0x136/0x2c0 [ 24.890425] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 24.895855] ? rtnl_is_locked+0x54/0xb0 [ 24.899801] ? rtnl_kfree_skbs+0x70/0x70 [ 24.903840] raw_notifier_call_chain+0x2d/0x40 [ 24.908399] call_netdevice_notifiers_info+0x32/0x60 [ 24.913474] call_netdevice_notifiers+0xac/0x100 [ 24.918203] ? mark_held_locks+0xaf/0x100 [ 24.922322] ? call_netdevice_notifiers_info+0x60/0x60 [ 24.927569] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 24.932652] do_setlink+0xc10/0x3b30 [ 24.936338] ? get_kernel_page+0x110/0x110 [ 24.940547] ? print_irqtrace_events+0x270/0x270 [ 24.945279] ? rtnl_fdb_del+0xb20/0xb20 [ 24.949228] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.954392] ? print_irqtrace_events+0x270/0x270 [ 24.959125] ? print_irqtrace_events+0x270/0x270 [ 24.963855] ? print_irqtrace_events+0x270/0x270 [ 24.968592] ? lock_pin_lock+0x360/0x360 [ 24.972627] ? print_irqtrace_events+0x270/0x270 [ 24.977357] ? __lock_acquire+0x664/0x3e00 [ 24.981561] ? __put_compound_page+0xb0/0xb0 [ 24.985944] ? print_irqtrace_events+0x270/0x270 [ 24.990677] ? print_irqtrace_events+0x270/0x270 [ 24.995403] ? __lock_acquire+0x664/0x3e00 [ 24.999620] ? rtnl_is_locked+0x54/0xb0 [ 25.003567] ? validate_linkmsg+0x5f0/0x8e0 [ 25.007864] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 25.012420] ? netdev_master_upper_dev_get+0x157/0x200 [ 25.017668] ? __dev_get_by_flags+0x180/0x180 [ 25.022134] ? rcu_note_context_switch+0x710/0x710 [ 25.027036] ? avc_has_perm_noaudit+0x355/0x520 [ 25.031683] rtnl_newlink+0xf5a/0x1ab0 [ 25.035554] ? __mutex_lock+0x16f/0x1a80 [ 25.039587] ? lock_downgrade+0x980/0x980 [ 25.043719] ? rtnl_link_unregister+0x330/0x330 [ 25.048362] ? avc_has_extended_perms+0x12c0/0x12c0 [ 25.053361] ? check_noncircular+0x20/0x20 [ 25.057614] ? lock_release+0xa40/0xa40 [ 25.061565] ? __lock_is_held+0xb6/0x140 [ 25.065604] ? rtnl_link_unregister+0x330/0x330 [ 25.070244] rtnetlink_rcv_msg+0x733/0x1020 [ 25.074541] ? validate_linkmsg+0x8e0/0x8e0 [ 25.078837] ? check_noncircular+0x20/0x20 [ 25.083056] ? find_held_lock+0x35/0x1d0 [ 25.087096] ? netlink_lookup+0x5f7/0xa90 [ 25.091214] ? lock_downgrade+0x980/0x980 [ 25.095336] ? find_held_lock+0x35/0x1d0 [ 25.099374] ? rtnl_link_unregister+0x330/0x330 [ 25.104021] ? netlink_deliver_tap+0x148/0xcf0 [ 25.108580] ? lock_downgrade+0x980/0x980 [ 25.112703] ? lock_release+0xa40/0xa40 [ 25.116647] ? netlink_lookup+0x620/0xa90 [ 25.120771] ? rtnl_link_unregister+0x330/0x330 [ 25.125419] ? netlink_deliver_tap+0x171/0xcf0 [ 25.129976] netlink_rcv_skb+0x14b/0x380 [ 25.134015] ? validate_linkmsg+0x8e0/0x8e0 [ 25.138316] ? netlink_ack+0xa10/0xa10 [ 25.142181] ? netlink_skb_destructor+0x1d0/0x1d0 [ 25.147002] rtnetlink_rcv+0x1c/0x20 [ 25.150694] netlink_unicast+0x4ee/0x700 [ 25.154733] ? netlink_attachskb+0x8a0/0x8a0 [ 25.159118] ? security_netlink_send+0x81/0xb0 [ 25.163673] netlink_sendmsg+0xa4a/0xe60 [ 25.167712] ? netlink_unicast+0x700/0x700 [ 25.171921] ? security_socket_sendmsg+0x89/0xb0 [ 25.176648] ? netlink_unicast+0x700/0x700 [ 25.180855] sock_sendmsg+0xca/0x110 [ 25.184543] ___sys_sendmsg+0x767/0x8b0 [ 25.188494] ? copy_msghdr_from_user+0x590/0x590 [ 25.193230] ? __do_page_fault+0x5f7/0xc90 [ 25.197439] ? lock_downgrade+0x980/0x980 [ 25.201565] ? __fget_light+0x297/0x380 [ 25.205512] ? fget_raw+0x20/0x20 [ 25.208939] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.213492] ? vmacache_find+0x5f/0x280 [ 25.217442] ? up_read+0x1a/0x40 [ 25.220780] ? __do_page_fault+0x3d6/0xc90 [ 25.224993] ? __fdget+0x18/0x20 [ 25.228340] __sys_sendmsg+0xe5/0x210 [ 25.232111] ? __sys_sendmsg+0xe5/0x210 [ 25.236057] ? SyS_shutdown+0x290/0x290 [ 25.240007] ? __do_page_fault+0xc90/0xc90 [ 25.244224] ? __fd_install+0x6cb/0x740 [ 25.248197] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.253192] SyS_sendmsg+0x2d/0x50 [ 25.256707] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.261434] RIP: 0033:0x445309 [ 25.264597] RSP: 002b:00007ffff52b95c8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 25.272277] RAX: ffffffffffffffda RBX: 000000000000003e RCX: 0000000000445309 [ 25.279519] RDX: 0000000000000000 RSI: 0000000020bf6000 RDI: 0000000000000004 [ 25.286762] RBP: 00007ffff52b96d8 R08: 000000000000834c R09: 000000000000834c [ 25.294004] R10: 000000000000834c R11: 0000000000000213 R12: 00007ffff52b96d8 [ 25.301252] R13: 00000000004027d0 R14: 0000000000000000 R15: 0000000000000000 [ 25.309141] Dumping ftrace buffer: [ 25.312727] (ftrace buffer empty) [ 25.316409] Kernel Offset: disabled [ 25.320009] Rebooting in 86400 seconds..