[....] Starting enhanced syslogd: rsyslogd[ 13.777323] audit: type=1400 audit(1516837914.732:5): avc: denied { syslog } for pid=3520 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: [ 18.020009] audit: type=1400 audit(1516837918.975:6): avc: denied { map } for pid=3661 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 '10.128.0.23' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 26.279196] audit: type=1400 audit(1516837927.234:7): avc: denied { map } for pid=3675 comm="syzkaller097473" path="/root/syzkaller097473137" 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 [ 26.685909] 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 [ 27.048300] WARNING: CPU: 0 PID: 3675 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 27.056213] Kernel panic - not syncing: panic_on_warn set ... [ 27.056213] [ 27.065207] CPU: 0 PID: 3675 Comm: syzkaller097473 Not tainted 4.15.0-rc9+ #278 [ 27.072623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.081948] Call Trace: [ 27.084515] dump_stack+0x194/0x257 [ 27.088116] ? arch_local_irq_restore+0x53/0x53 [ 27.092762] ? vsnprintf+0x1ed/0x1900 [ 27.096540] panic+0x1e4/0x41c [ 27.099708] ? refcount_error_report+0x214/0x214 [ 27.104446] ? show_regs_print_info+0x18/0x18 [ 27.108917] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.113909] ? __warn+0x1c1/0x200 [ 27.117337] ? kmalloc_slab+0x5d/0x70 [ 27.121110] __warn+0x1dc/0x200 [ 27.125104] ? kmalloc_slab+0x5d/0x70 [ 27.128899] report_bug+0x211/0x2d0 [ 27.132507] fixup_bug.part.11+0x37/0x80 [ 27.136542] do_error_trap+0x2d7/0x3e0 [ 27.140399] ? netlink_sendmsg+0xa4a/0xe60 [ 27.144605] ? sock_sendmsg+0xca/0x110 [ 27.148462] ? ___sys_sendmsg+0x767/0x8b0 [ 27.152585] ? math_error+0x400/0x400 [ 27.156360] ? check_noncircular+0x20/0x20 [ 27.160567] ? print_irqtrace_events+0x270/0x270 [ 27.165296] ? __lock_is_held+0xb6/0x140 [ 27.169334] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.174153] do_invalid_op+0x1b/0x20 [ 27.177837] invalid_op+0x22/0x40 [ 27.181262] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 27.185637] RSP: 0018:ffff8801c5aae940 EFLAGS: 00010246 [ 27.190971] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 27.198212] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 27.205452] RBP: ffff8801c5aae940 R08: 1ffff10038b55c9b R09: 0000000000000000 [ 27.212692] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 27.219933] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d8016f80 [ 27.227190] ? tun_device_event+0x3bf/0xcb0 [ 27.231492] __kmalloc+0x25/0x760 [ 27.234924] ? tun_device_event+0x3d3/0xcb0 [ 27.239223] tun_device_event+0x3d3/0xcb0 [ 27.243345] ? sel_netif_destroy+0x250/0x250 [ 27.247736] ? lockdep_rtnl_is_held+0x1a/0x30 [ 27.252208] notifier_call_chain+0x136/0x2c0 [ 27.256594] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 27.262023] ? __lock_acquire+0x664/0x3e00 [ 27.266238] ? rtnl_is_locked+0x54/0xb0 [ 27.270186] ? rtnl_kfree_skbs+0x70/0x70 [ 27.274222] raw_notifier_call_chain+0x2d/0x40 [ 27.278785] call_netdevice_notifiers_info+0x32/0x60 [ 27.283875] call_netdevice_notifiers+0xac/0x100 [ 27.288605] ? call_netdevice_notifiers_info+0x60/0x60 [ 27.293865] do_setlink+0xc10/0x3b30 [ 27.297551] ? __lock_acquire+0x664/0x3e00 [ 27.301763] ? print_irqtrace_events+0x270/0x270 [ 27.306501] ? rtnl_fdb_del+0xb20/0xb20 [ 27.310452] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 27.315616] ? print_irqtrace_events+0x270/0x270 [ 27.320357] ? print_irqtrace_events+0x270/0x270 [ 27.325088] ? print_irqtrace_events+0x270/0x270 [ 27.329818] ? lock_pin_lock+0x360/0x360 [ 27.333853] ? print_irqtrace_events+0x270/0x270 [ 27.338584] ? __lock_acquire+0x664/0x3e00 [ 27.342792] ? __put_compound_page+0xb0/0xb0 [ 27.347176] ? print_irqtrace_events+0x270/0x270 [ 27.352516] ? print_irqtrace_events+0x270/0x270 [ 27.358379] ? __lock_acquire+0x664/0x3e00 [ 27.362599] ? rtnl_is_locked+0x54/0xb0 [ 27.366548] ? validate_linkmsg+0x5f0/0x8e0 [ 27.370846] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 27.375402] ? netdev_master_upper_dev_get+0x157/0x200 [ 27.380651] ? __dev_get_by_flags+0x180/0x180 [ 27.385126] rtnl_newlink+0xf5a/0x1ab0 [ 27.388986] ? __mutex_lock+0x16f/0x1a80 [ 27.393030] ? lock_downgrade+0x980/0x980 [ 27.397166] ? rtnl_link_unregister+0x330/0x330 [ 27.401813] ? avc_has_extended_perms+0x12c0/0x12c0 [ 27.406814] ? check_noncircular+0x20/0x20 [ 27.411073] ? __lock_is_held+0xb6/0x140 [ 27.415114] ? rtnl_link_unregister+0x330/0x330 [ 27.419757] rtnetlink_rcv_msg+0x733/0x1020 [ 27.424064] ? validate_linkmsg+0x8e0/0x8e0 [ 27.428366] ? check_noncircular+0x20/0x20 [ 27.432579] ? find_held_lock+0x35/0x1d0 [ 27.436624] ? netlink_lookup+0x5f7/0xa90 [ 27.440749] ? lock_downgrade+0x980/0x980 [ 27.444878] ? find_held_lock+0x35/0x1d0 [ 27.448924] ? rtnl_link_unregister+0x330/0x330 [ 27.453567] ? netlink_deliver_tap+0x148/0xcf0 [ 27.458123] ? lock_downgrade+0x980/0x980 [ 27.462250] ? lock_release+0xa40/0xa40 [ 27.466198] ? netlink_lookup+0x620/0xa90 [ 27.470327] ? rtnl_link_unregister+0x330/0x330 [ 27.474977] ? netlink_deliver_tap+0x171/0xcf0 [ 27.479538] netlink_rcv_skb+0x14b/0x380 [ 27.483574] ? validate_linkmsg+0x8e0/0x8e0 [ 27.487870] ? netlink_ack+0xa10/0xa10 [ 27.491734] ? netlink_skb_destructor+0x1d0/0x1d0 [ 27.496555] rtnetlink_rcv+0x1c/0x20 [ 27.500241] netlink_unicast+0x4ee/0x700 [ 27.504278] ? netlink_attachskb+0x8a0/0x8a0 [ 27.508666] netlink_sendmsg+0xa4a/0xe60 [ 27.512705] ? netlink_unicast+0x700/0x700 [ 27.516915] ? security_socket_sendmsg+0x89/0xb0 [ 27.521642] ? netlink_unicast+0x700/0x700 [ 27.525854] sock_sendmsg+0xca/0x110 [ 27.529541] ___sys_sendmsg+0x767/0x8b0 [ 27.533495] ? copy_msghdr_from_user+0x590/0x590 [ 27.538232] ? __do_page_fault+0x5f7/0xc90 [ 27.542439] ? lock_downgrade+0x980/0x980 [ 27.546567] ? __fget_light+0x297/0x380 [ 27.550517] ? fget_raw+0x20/0x20 [ 27.553943] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 27.558497] ? vmacache_find+0x5f/0x280 [ 27.562452] ? up_read+0x1a/0x40 [ 27.565792] ? __do_page_fault+0x3d6/0xc90 [ 27.569997] ? get_unused_fd_flags+0x190/0x190 [ 27.574563] ? __fdget+0x18/0x20 [ 27.577906] __sys_sendmsg+0xe5/0x210 [ 27.581677] ? __sys_sendmsg+0xe5/0x210 [ 27.585625] ? SyS_shutdown+0x290/0x290 [ 27.589573] ? __do_page_fault+0xc90/0xc90 [ 27.593783] ? fd_install+0x4d/0x60 [ 27.597393] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.602386] SyS_sendmsg+0x2d/0x50 [ 27.605902] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 27.610629] RIP: 0033:0x445119 [ 27.615355] RSP: 002b:00007fff3cb61858 EFLAGS: 00000207 ORIG_RAX: 000000000000002e [ 27.624426] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445119 [ 27.631667] RDX: 0000000000000000 RSI: 0000000020504000 RDI: 0000000000000004 [ 27.638908] RBP: 00007fff3cb61968 R08: 0000000000000000 R09: 0000000000000000 [ 27.646150] R10: 0000000000000000 R11: 0000000000000207 R12: 00007fff3cb61968 [ 27.653392] R13: 00000000004025e0 R14: 0000000000000000 R15: 0000000000000000 [ 27.661458] Dumping ftrace buffer: [ 27.665089] (ftrace buffer empty) [ 27.668775] Kernel Offset: disabled [ 27.672379] Rebooting in 86400 seconds..