[....] Starting enhanced syslogd: rsyslogd[ 13.164425] audit: type=1400 audit(1516837893.234:5): avc: denied { syslog } for pid=3507 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: [ 18.074947] audit: type=1400 audit(1516837898.144:6): 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 '10.128.0.52' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 24.322540] audit: type=1400 audit(1516837904.392:7): avc: denied { map } for pid=3661 comm="syzkaller776388" path="/root/syzkaller776388380" 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 [ 24.716263] 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 [ 25.065504] WARNING: CPU: 0 PID: 3661 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 25.073408] Kernel panic - not syncing: panic_on_warn set ... [ 25.073408] [ 25.080742] CPU: 0 PID: 3661 Comm: syzkaller776388 Not tainted 4.15.0-rc9+ #188 [ 25.088252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.097579] Call Trace: [ 25.100144] dump_stack+0x194/0x257 [ 25.103747] ? arch_local_irq_restore+0x53/0x53 [ 25.108396] ? vsnprintf+0x1ed/0x1900 [ 25.112195] panic+0x1e4/0x41c [ 25.115820] ? refcount_error_report+0x214/0x214 [ 25.120558] ? show_regs_print_info+0x18/0x18 [ 25.125054] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.130054] ? __warn+0x1c1/0x200 [ 25.133486] ? kmalloc_slab+0x5d/0x70 [ 25.137260] __warn+0x1dc/0x200 [ 25.140512] ? kmalloc_slab+0x5d/0x70 [ 25.144288] report_bug+0x211/0x2d0 [ 25.147896] fixup_bug.part.11+0x37/0x80 [ 25.151931] do_error_trap+0x2d7/0x3e0 [ 25.155789] ? netlink_sendmsg+0xa4a/0xe60 [ 25.159995] ? sock_sendmsg+0xca/0x110 [ 25.163857] ? ___sys_sendmsg+0x767/0x8b0 [ 25.167982] ? math_error+0x400/0x400 [ 25.171756] ? check_noncircular+0x20/0x20 [ 25.175971] ? print_irqtrace_events+0x270/0x270 [ 25.180700] ? __lock_is_held+0xb6/0x140 [ 25.184739] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.189558] do_invalid_op+0x1b/0x20 [ 25.193254] invalid_op+0x22/0x40 [ 25.196680] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 25.201059] RSP: 0018:ffff8801bb76e7a0 EFLAGS: 00010246 [ 25.206397] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 25.213641] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 25.220885] RBP: ffff8801bb76e7a0 R08: 1ffff100376edc67 R09: 0000000000000000 [ 25.228129] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 25.235381] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d4e942c0 [ 25.242650] ? tun_device_event+0x3bf/0xcb0 [ 25.246954] __kmalloc+0x25/0x760 [ 25.250388] ? tun_device_event+0x3d3/0xcb0 [ 25.254692] tun_device_event+0x3d3/0xcb0 [ 25.258816] ? sel_netif_destroy+0x250/0x250 [ 25.263209] ? lockdep_rtnl_is_held+0x1a/0x30 [ 25.267683] notifier_call_chain+0x136/0x2c0 [ 25.272071] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 25.277505] ? print_irqtrace_events+0x270/0x270 [ 25.282238] ? rtnl_is_locked+0x54/0xb0 [ 25.286189] ? rtnl_kfree_skbs+0x70/0x70 [ 25.290230] raw_notifier_call_chain+0x2d/0x40 [ 25.294791] call_netdevice_notifiers_info+0x32/0x60 [ 25.299869] call_netdevice_notifiers+0xac/0x100 [ 25.304602] ? call_netdevice_notifiers_info+0x60/0x60 [ 25.309861] do_setlink+0xc10/0x3b30 [ 25.313557] ? bpf_prog_kallsyms_find+0xbd/0x440 [ 25.318295] ? rtnl_fdb_del+0xb20/0xb20 [ 25.322245] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.327417] ? print_irqtrace_events+0x270/0x270 [ 25.332151] ? print_irqtrace_events+0x270/0x270 [ 25.336888] ? __free_insn_slot+0x5c0/0x5c0 [ 25.341193] ? print_irqtrace_events+0x270/0x270 [ 25.345925] ? print_irqtrace_events+0x270/0x270 [ 25.350658] ? lock_pin_lock+0x360/0x360 [ 25.354696] ? print_irqtrace_events+0x270/0x270 [ 25.359435] ? __lock_acquire+0x664/0x3e00 [ 25.363648] ? print_irqtrace_events+0x270/0x270 [ 25.368382] ? print_irqtrace_events+0x270/0x270 [ 25.373116] ? print_irqtrace_events+0x270/0x270 [ 25.377846] ? __lock_acquire+0x664/0x3e00 [ 25.382070] ? rtnl_is_locked+0x54/0xb0 [ 25.386037] ? validate_linkmsg+0x5f0/0x8e0 [ 25.390336] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 25.394893] ? netdev_master_upper_dev_get+0x157/0x200 [ 25.400145] ? __dev_get_by_flags+0x180/0x180 [ 25.404630] rtnl_newlink+0xf5a/0x1ab0 [ 25.408494] ? __mutex_lock+0x16f/0x1a80 [ 25.412542] ? rtnl_link_unregister+0x330/0x330 [ 25.417189] ? avc_has_extended_perms+0x12c0/0x12c0 [ 25.422190] ? check_noncircular+0x20/0x20 [ 25.426441] ? __lock_is_held+0xb6/0x140 [ 25.430484] ? rtnl_link_unregister+0x330/0x330 [ 25.435135] rtnetlink_rcv_msg+0x733/0x1020 [ 25.439437] ? validate_linkmsg+0x8e0/0x8e0 [ 25.443737] ? check_noncircular+0x20/0x20 [ 25.447949] ? find_held_lock+0x35/0x1d0 [ 25.451990] ? netlink_lookup+0x5f7/0xa90 [ 25.456122] ? lock_downgrade+0x980/0x980 [ 25.460244] ? find_held_lock+0x35/0x1d0 [ 25.464284] ? rtnl_link_unregister+0x330/0x330 [ 25.468923] ? netlink_deliver_tap+0x148/0xcf0 [ 25.473480] ? lock_downgrade+0x980/0x980 [ 25.477605] ? lock_release+0xa40/0xa40 [ 25.481565] ? netlink_lookup+0x620/0xa90 [ 25.485696] ? rtnl_link_unregister+0x330/0x330 [ 25.490356] ? netlink_deliver_tap+0x171/0xcf0 [ 25.494916] netlink_rcv_skb+0x14b/0x380 [ 25.499043] ? validate_linkmsg+0x8e0/0x8e0 [ 25.503347] ? netlink_ack+0xa10/0xa10 [ 25.507223] ? netlink_skb_destructor+0x1d0/0x1d0 [ 25.512053] rtnetlink_rcv+0x1c/0x20 [ 25.515742] netlink_unicast+0x4ee/0x700 [ 25.519779] ? netlink_attachskb+0x8a0/0x8a0 [ 25.524170] netlink_sendmsg+0xa4a/0xe60 [ 25.528212] ? netlink_unicast+0x700/0x700 [ 25.532422] ? security_socket_sendmsg+0x89/0xb0 [ 25.537151] ? netlink_unicast+0x700/0x700 [ 25.541360] sock_sendmsg+0xca/0x110 [ 25.545052] ___sys_sendmsg+0x767/0x8b0 [ 25.548998] ? SyS_membarrier+0x600/0x600 [ 25.553128] ? copy_msghdr_from_user+0x590/0x590 [ 25.557855] ? check_noncircular+0x20/0x20 [ 25.562081] ? check_noncircular+0x20/0x20 [ 25.566294] ? __pmd_alloc+0x4e0/0x4e0 [ 25.570161] ? __fget_light+0x297/0x380 [ 25.574108] ? fget_raw+0x20/0x20 [ 25.577542] ? handle_mm_fault+0x248/0x8d0 [ 25.581766] ? find_held_lock+0x35/0x1d0 [ 25.585816] __sys_sendmsg+0xe5/0x210 [ 25.589590] ? __sys_sendmsg+0xe5/0x210 [ 25.593537] ? SyS_shutdown+0x290/0x290 [ 25.597482] ? handle_mm_fault+0x410/0x8d0 [ 25.601690] ? __do_page_fault+0x32d/0xc90 [ 25.605899] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.610454] ? vmacache_find+0x5f/0x280 [ 25.614425] compat_SyS_sendmsg+0x2a/0x40 [ 25.618550] ? compat_SyS_getsockopt+0x420/0x420 [ 25.623278] do_fast_syscall_32+0x3ee/0xf9d [ 25.627592] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.632158] ? kasan_check_read+0x11/0x20 [ 25.636286] ? syscall_return_slowpath+0x550/0x550 [ 25.641197] ? SyS_rt_sigaction+0x94/0x1b0 [ 25.645404] ? SyS_sigprocmask+0x4b0/0x4b0 [ 25.649620] ? SyS_read+0x184/0x220 [ 25.653220] ? retint_user+0x18/0x18 [ 25.656909] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.661728] entry_SYSENTER_compat+0x54/0x63 [ 25.666108] RIP: 0023:0xf7fa5c79 [ 25.669444] RSP: 002b:00000000ffe9b4ec EFLAGS: 00000207 ORIG_RAX: 0000000000000172 [ 25.677124] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020504000 [ 25.684368] RDX: 0000000000000000 RSI: 0000000000000167 RDI: 0000000000000010 [ 25.691612] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 25.698854] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.706099] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.714059] Dumping ftrace buffer: [ 25.717664] (ftrace buffer empty) [ 25.721358] Kernel Offset: disabled [ 25.724969] Rebooting in 86400 seconds..