[....] Starting enhanced syslogd: rsyslogd[ 16.793751] audit: type=1400 audit(1517936292.883:5): avc: denied { syslog } for pid=3926 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 periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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: [ 22.703490] audit: type=1400 audit(1517936298.793:6): avc: denied { map } for pid=4067 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 '10.128.15.207' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 28.978234] audit: type=1400 audit(1517936305.068:7): avc: denied { map } for pid=4081 comm="syzkaller338215" path="/root/syzkaller338215405" 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 [ 29.380740] 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 [ 29.742871] WARNING: CPU: 0 PID: 4081 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 29.750851] Kernel panic - not syncing: panic_on_warn set ... [ 29.750851] [ 29.758204] CPU: 0 PID: 4081 Comm: syzkaller338215 Not tainted 4.15.0+ #210 [ 29.765278] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.774602] Call Trace: [ 29.777167] dump_stack+0x194/0x257 [ 29.780768] ? arch_local_irq_restore+0x53/0x53 [ 29.785413] ? vsnprintf+0x1ed/0x1900 [ 29.789222] panic+0x1e4/0x41c [ 29.792389] ? refcount_error_report+0x214/0x214 [ 29.797147] ? show_regs_print_info+0x18/0x18 [ 29.801621] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.806611] ? __warn+0x1c1/0x200 [ 29.810042] ? kmalloc_slab+0x5d/0x70 [ 29.813813] __warn+0x1dc/0x200 [ 29.817065] ? kmalloc_slab+0x5d/0x70 [ 29.820840] report_bug+0x211/0x2d0 [ 29.824450] fixup_bug.part.11+0x37/0x80 [ 29.828483] do_error_trap+0x2d7/0x3e0 [ 29.832345] ? netlink_sendmsg+0xa4a/0xe60 [ 29.836556] ? sock_sendmsg+0xca/0x110 [ 29.840415] ? ___sys_sendmsg+0x767/0x8b0 [ 29.844536] ? math_error+0x400/0x400 [ 29.848310] ? find_held_lock+0x35/0x1d0 [ 29.852346] ? print_irqtrace_events+0x270/0x270 [ 29.857076] ? check_noncircular+0x20/0x20 [ 29.861284] ? __lock_is_held+0xb6/0x140 [ 29.865947] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.870771] do_invalid_op+0x1b/0x20 [ 29.874460] invalid_op+0x22/0x40 [ 29.877887] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 29.882262] RSP: 0018:ffff8801b633e980 EFLAGS: 00010246 [ 29.887599] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83b8feed [ 29.894840] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000400000008 [ 29.902086] RBP: ffff8801b633e980 R08: 1ffff10036c67ca3 R09: 0000000000000000 [ 29.909333] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000400000008 [ 29.916574] R13: dffffc0000000000 R14: 00000000014080c0 R15: ffff8801d80c2480 [ 29.923836] ? tun_device_event+0x45d/0xec0 [ 29.928145] __kmalloc+0x25/0x760 [ 29.931582] ? tun_device_event+0x471/0xec0 [ 29.935879] tun_device_event+0x471/0xec0 [ 29.939999] ? dev_map_notification+0x9a/0x600 [ 29.944568] ? inetdev_init+0x530/0x530 [ 29.948514] ? bond_open+0xe20/0xe20 [ 29.952203] ? sel_netif_netdev_notifier_handler+0x86/0x420 [ 29.957882] ? igmp_netdev_event+0x87/0x760 [ 29.962179] ? tun_net_xmit+0x19e0/0x19e0 [ 29.966313] ? lockdep_rtnl_is_held+0x1a/0x30 [ 29.970779] ? fib_netdev_event+0xf0/0x300 [ 29.974991] notifier_call_chain+0x136/0x2c0 [ 29.979378] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 29.984803] ? print_irqtrace_events+0x270/0x270 [ 29.989542] ? rtnl_is_locked+0x54/0xb0 [ 29.993489] ? rtnl_kfree_skbs+0x70/0x70 [ 29.997531] raw_notifier_call_chain+0x2d/0x40 [ 30.002087] call_netdevice_notifiers_info+0x32/0x70 [ 30.007165] dev_change_tx_queue_len+0x117/0x220 [ 30.011902] ? __lock_acquire+0x664/0x3e00 [ 30.016111] ? dev_change_flags+0x140/0x140 [ 30.020408] ? print_irqtrace_events+0x270/0x270 [ 30.025154] do_setlink+0xba7/0x3bb0 [ 30.028842] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.034003] ? __lock_acquire+0x664/0x3e00 [ 30.038222] ? rtnl_fdb_del+0xb20/0xb20 [ 30.042173] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.047336] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.052504] ? __lock_acquire+0x664/0x3e00 [ 30.056719] ? print_irqtrace_events+0x270/0x270 [ 30.061457] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.066630] ? print_irqtrace_events+0x270/0x270 [ 30.071362] ? print_irqtrace_events+0x270/0x270 [ 30.076093] ? __lock_acquire+0x664/0x3e00 [ 30.080304] ? check_noncircular+0x20/0x20 [ 30.084515] ? rtnl_is_locked+0x54/0xb0 [ 30.088462] ? validate_linkmsg+0x5f0/0x8e0 [ 30.092759] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 30.097314] ? netdev_master_upper_dev_get+0x15b/0x220 [ 30.102564] ? __dev_get_by_flags+0x1a0/0x1a0 [ 30.107044] rtnl_newlink+0xf1c/0x1a20 [ 30.110908] ? __mutex_lock+0x16f/0x1a80 [ 30.114951] ? rtnl_link_unregister+0x330/0x330 [ 30.119600] ? avc_has_perm_noaudit+0x37e/0x520 [ 30.124255] ? avc_has_extended_perms+0x12c0/0x12c0 [ 30.129294] ? rtnl_get_link+0x124/0x2b0 [ 30.133337] ? rtnl_dump_all+0x460/0x460 [ 30.137374] ? ns_capable_common+0xcf/0x160 [ 30.141679] rtnetlink_rcv_msg+0x57f/0xb10 [ 30.145889] ? rtnl_link_unregister+0x330/0x330 [ 30.150536] ? validate_linkmsg+0x8e0/0x8e0 [ 30.154844] ? __might_fault+0x110/0x1d0 [ 30.158886] netlink_rcv_skb+0x14b/0x380 [ 30.162919] ? validate_linkmsg+0x8e0/0x8e0 [ 30.167223] ? netlink_ack+0xa10/0xa10 [ 30.171098] ? netlink_skb_destructor+0x1d0/0x1d0 [ 30.175921] rtnetlink_rcv+0x1c/0x20 [ 30.179608] netlink_unicast+0x4c4/0x6b0 [ 30.183648] ? netlink_attachskb+0x8a0/0x8a0 [ 30.188037] ? security_netlink_send+0x81/0xb0 [ 30.192594] netlink_sendmsg+0xa4a/0xe60 [ 30.196635] ? netlink_unicast+0x6b0/0x6b0 [ 30.200845] ? security_socket_sendmsg+0x89/0xb0 [ 30.205572] ? netlink_unicast+0x6b0/0x6b0 [ 30.209791] sock_sendmsg+0xca/0x110 [ 30.213481] ___sys_sendmsg+0x767/0x8b0 [ 30.217428] ? SyS_membarrier+0x600/0x600 [ 30.221553] ? copy_msghdr_from_user+0x590/0x590 [ 30.226295] ? __pmd_alloc+0x4e0/0x4e0 [ 30.230156] ? check_noncircular+0x20/0x20 [ 30.234368] ? __fget_light+0x2b2/0x3c0 [ 30.238325] ? fget_raw+0x20/0x20 [ 30.241757] ? handle_mm_fault+0x2a0/0x930 [ 30.245969] ? find_held_lock+0x35/0x1d0 [ 30.250038] __sys_sendmsg+0xe5/0x210 [ 30.253814] ? __sys_sendmsg+0xe5/0x210 [ 30.257760] ? SyS_shutdown+0x290/0x290 [ 30.261715] ? handle_mm_fault+0x476/0x930 [ 30.265924] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.270485] ? vmacache_find+0x5f/0x280 [ 30.274456] compat_SyS_sendmsg+0x2a/0x40 [ 30.278587] ? compat_SyS_getsockopt+0x420/0x420 [ 30.283318] do_fast_syscall_32+0x3ee/0xfa1 [ 30.287618] ? do_int80_syscall_32+0x9d0/0x9d0 [ 30.292175] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.296918] ? syscall_return_slowpath+0x550/0x550 [ 30.301820] ? syscall_return_slowpath+0x2ac/0x550 [ 30.306723] ? prepare_exit_to_usermode+0x350/0x350 [ 30.311712] ? retint_user+0x18/0x18 [ 30.315402] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.320224] entry_SYSENTER_compat+0x54/0x63 [ 30.324607] RIP: 0023:0xf7ff4c79 [ 30.327942] RSP: 002b:00000000fff0d4fc EFLAGS: 00000207 ORIG_RAX: 0000000000000172 [ 30.335622] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020504000 [ 30.342864] RDX: 0000000000000000 RSI: 0000000000000167 RDI: 0000000000000010 [ 30.350108] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 30.357350] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.364591] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.372589] Dumping ftrace buffer: [ 30.376290] (ftrace buffer empty) [ 30.379992] Kernel Offset: disabled [ 30.383601] Rebooting in 86400 seconds..