[....] Starting enhanced syslogd: rsyslogd[ 12.413120] audit: type=1400 audit(1516972024.672:5): avc: denied { syslog } for pid=3510 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: [ 19.380044] audit: type=1400 audit(1516972031.639:6): avc: denied { map } for pid=3650 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 '10.128.0.31' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 34.312230] audit: type=1400 audit(1516972046.572:7): avc: denied { map } for pid=3667 comm="syzkaller454330" path="/root/syzkaller454330828" 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 [ 34.605927] 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 [ 34.967706] WARNING: CPU: 0 PID: 3667 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 34.975639] Kernel panic - not syncing: panic_on_warn set ... [ 34.975639] [ 34.982988] CPU: 0 PID: 3667 Comm: syzkaller454330 Not tainted 4.15.0-rc9+ #281 [ 34.990408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.999745] Call Trace: [ 35.002316] dump_stack+0x194/0x257 [ 35.005920] ? arch_local_irq_restore+0x53/0x53 [ 35.010564] ? vsnprintf+0x1ed/0x1900 [ 35.014352] panic+0x1e4/0x41c [ 35.017515] ? refcount_error_report+0x214/0x214 [ 35.022244] ? show_regs_print_info+0x18/0x18 [ 35.026734] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.031722] ? __warn+0x1c1/0x200 [ 35.035238] ? kmalloc_slab+0x5d/0x70 [ 35.039007] __warn+0x1dc/0x200 [ 35.042260] ? kmalloc_slab+0x5d/0x70 [ 35.046037] report_bug+0x211/0x2d0 [ 35.049652] fixup_bug.part.11+0x37/0x80 [ 35.053687] do_error_trap+0x2d7/0x3e0 [ 35.057576] ? netlink_sendmsg+0xa4a/0xe60 [ 35.061797] ? sock_sendmsg+0xca/0x110 [ 35.065664] ? ___sys_sendmsg+0x767/0x8b0 [ 35.069792] ? math_error+0x400/0x400 [ 35.073569] ? check_noncircular+0x20/0x20 [ 35.077786] ? print_irqtrace_events+0x270/0x270 [ 35.082514] ? __lock_is_held+0xb6/0x140 [ 35.086553] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.091372] do_invalid_op+0x1b/0x20 [ 35.095058] invalid_op+0x22/0x40 [ 35.098483] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 35.102868] RSP: 0018:ffff8801bbf86940 EFLAGS: 00010246 [ 35.108205] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 35.115451] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 35.122691] RBP: ffff8801bbf86940 R08: 1ffff100377f0c9b R09: 0000000000000000 [ 35.129932] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 35.137173] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d4edae40 [ 35.144442] ? tun_device_event+0x3bf/0xcb0 [ 35.148741] __kmalloc+0x25/0x760 [ 35.152171] ? tun_device_event+0x3d3/0xcb0 [ 35.156466] tun_device_event+0x3d3/0xcb0 [ 35.161110] ? sel_netif_destroy+0x250/0x250 [ 35.165585] ? lockdep_rtnl_is_held+0x1a/0x30 [ 35.170058] notifier_call_chain+0x136/0x2c0 [ 35.174445] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 35.179870] ? bpf_prog_kallsyms_find+0xbd/0x440 [ 35.184598] ? rtnl_is_locked+0x54/0xb0 [ 35.188554] ? rtnl_kfree_skbs+0x70/0x70 [ 35.192591] raw_notifier_call_chain+0x2d/0x40 [ 35.197148] call_netdevice_notifiers_info+0x32/0x60 [ 35.202235] call_netdevice_notifiers+0xac/0x100 [ 35.206961] ? __free_insn_slot+0x5c0/0x5c0 [ 35.211264] ? call_netdevice_notifiers_info+0x60/0x60 [ 35.216532] do_setlink+0xc10/0x3b30 [ 35.220303] ? is_bpf_text_address+0xa4/0x120 [ 35.224782] ? print_irqtrace_events+0x270/0x270 [ 35.229513] ? rtnl_fdb_del+0xb20/0xb20 [ 35.233461] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 35.238641] ? print_irqtrace_events+0x270/0x270 [ 35.243375] ? print_irqtrace_events+0x270/0x270 [ 35.248106] ? print_irqtrace_events+0x270/0x270 [ 35.252833] ? lock_pin_lock+0x360/0x360 [ 35.256868] ? print_irqtrace_events+0x270/0x270 [ 35.261595] ? __lock_acquire+0x664/0x3e00 [ 35.265802] ? __put_compound_page+0xb0/0xb0 [ 35.270185] ? print_irqtrace_events+0x270/0x270 [ 35.274926] ? print_irqtrace_events+0x270/0x270 [ 35.279652] ? __lock_acquire+0x664/0x3e00 [ 35.283868] ? rtnl_is_locked+0x54/0xb0 [ 35.287814] ? validate_linkmsg+0x5f0/0x8e0 [ 35.292122] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 35.296678] ? netdev_master_upper_dev_get+0x157/0x200 [ 35.301926] ? __dev_get_by_flags+0x180/0x180 [ 35.306400] rtnl_newlink+0xf5a/0x1ab0 [ 35.310357] ? __mutex_lock+0x16f/0x1a80 [ 35.314395] ? lock_downgrade+0x980/0x980 [ 35.318526] ? rtnl_link_unregister+0x330/0x330 [ 35.323175] ? avc_has_extended_perms+0x12c0/0x12c0 [ 35.328180] ? check_noncircular+0x20/0x20 [ 35.332431] ? __lock_is_held+0xb6/0x140 [ 35.336469] ? rtnl_link_unregister+0x330/0x330 [ 35.341109] rtnetlink_rcv_msg+0x733/0x1020 [ 35.345406] ? validate_linkmsg+0x8e0/0x8e0 [ 35.349704] ? check_noncircular+0x20/0x20 [ 35.353914] ? find_held_lock+0x35/0x1d0 [ 35.357955] ? netlink_lookup+0x5f7/0xa90 [ 35.362082] ? lock_downgrade+0x980/0x980 [ 35.366218] ? find_held_lock+0x35/0x1d0 [ 35.370267] ? rtnl_link_unregister+0x330/0x330 [ 35.374916] ? netlink_deliver_tap+0x148/0xcf0 [ 35.379469] ? lock_downgrade+0x980/0x980 [ 35.383591] ? lock_release+0xa40/0xa40 [ 35.387535] ? netlink_lookup+0x620/0xa90 [ 35.391660] ? rtnl_link_unregister+0x330/0x330 [ 35.396310] ? netlink_deliver_tap+0x171/0xcf0 [ 35.400870] netlink_rcv_skb+0x14b/0x380 [ 35.404917] ? validate_linkmsg+0x8e0/0x8e0 [ 35.409213] ? netlink_ack+0xa10/0xa10 [ 35.413079] ? netlink_skb_destructor+0x1d0/0x1d0 [ 35.417911] rtnetlink_rcv+0x1c/0x20 [ 35.421596] netlink_unicast+0x4ee/0x700 [ 35.425643] ? netlink_attachskb+0x8a0/0x8a0 [ 35.430028] ? security_netlink_send+0x81/0xb0 [ 35.434583] netlink_sendmsg+0xa4a/0xe60 [ 35.438619] ? netlink_unicast+0x700/0x700 [ 35.442842] ? security_socket_sendmsg+0x89/0xb0 [ 35.447580] ? netlink_unicast+0x700/0x700 [ 35.451787] sock_sendmsg+0xca/0x110 [ 35.455474] ___sys_sendmsg+0x767/0x8b0 [ 35.459422] ? copy_msghdr_from_user+0x590/0x590 [ 35.464160] ? __do_page_fault+0x5f7/0xc90 [ 35.468366] ? lock_downgrade+0x980/0x980 [ 35.472491] ? __fget_light+0x297/0x380 [ 35.476437] ? fget_raw+0x20/0x20 [ 35.479862] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 35.484415] ? vmacache_find+0x5f/0x280 [ 35.488367] ? up_read+0x1a/0x40 [ 35.491716] ? __do_page_fault+0x3d6/0xc90 [ 35.495922] ? get_unused_fd_flags+0x190/0x190 [ 35.500483] ? __fdget+0x18/0x20 [ 35.503827] __sys_sendmsg+0xe5/0x210 [ 35.507599] ? __sys_sendmsg+0xe5/0x210 [ 35.511547] ? SyS_shutdown+0x290/0x290 [ 35.515515] ? __do_page_fault+0xc90/0xc90 [ 35.519726] ? fd_install+0x4d/0x60 [ 35.523344] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.528352] SyS_sendmsg+0x2d/0x50 [ 35.531866] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 35.536593] RIP: 0033:0x4451a9 [ 35.539754] RSP: 002b:00007fff741d77d8 EFLAGS: 00000207 ORIG_RAX: 000000000000002e [ 35.547432] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004451a9 [ 35.554673] RDX: 0000000000000004 RSI: 0000000020504000 RDI: 0000000000000004 [ 35.561914] RBP: 00007fff741d7918 R08: 0000000000000000 R09: 0000000000000000 [ 35.569156] R10: 0000000000000000 R11: 0000000000000207 R12: 00007fff741d7918 [ 35.576400] R13: 0000000000402670 R14: 0000000000000000 R15: 0000000000000000 [ 35.584269] Dumping ftrace buffer: [ 35.587921] (ftrace buffer empty) [ 35.591604] Kernel Offset: disabled [ 35.595220] Rebooting in 86400 seconds..