[....] Starting enhanced syslogd: rsyslogd[ 13.111951] audit: type=1400 audit(1516016633.795:5): avc: denied { syslog } for pid=3504 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: [ 18.176893] audit: type=1400 audit(1516016638.860:6): avc: denied { map } for pid=3644 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 '10.128.15.220' (ECDSA) to the list of known hosts. [ 24.401065] audit: type=1400 audit(1516016645.084:7): avc: denied { map } for pid=3658 comm="syzkaller920794" path="/root/syzkaller920794421" 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 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 26.246411] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported 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 RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program executing program executing program executing program executing program executing program executing program [ 28.401158] syzkaller920794 uses obsolete (PF_INET,SOCK_PACKET) [ 28.410368] device lo entered promiscuous mode [ 28.417044] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 28.430411] device lo entered promiscuous mode [ 28.439049] device lo left promiscuous mode [ 28.441962] device lo entered promiscuous mode [ 28.459406] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program [ 28.462365] device lo entered promiscuous mode [ 28.474801] device lo left promiscuous mode [ 28.483247] device lo entered promiscuous mode [ 28.489252] device lo left promiscuous mode [ 28.490361] device lo entered promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.493688] device lo left promiscuous mode [ 28.501237] device lo entered promiscuous mode [ 28.504435] device lo left promiscuous mode executing program executing program executing program executing program [ 28.510690] device lo entered promiscuous mode [ 28.522241] device lo left promiscuous mode [ 28.528089] device lo entered promiscuous mode [ 28.531476] device lo left promiscuous mode [ 28.532697] device lo entered promiscuous mode [ 28.536677] device lo left promiscuous mode [ 28.543856] device lo entered promiscuous mode [ 28.549859] device lo left promiscuous mode [ 28.552542] device lo entered promiscuous mode [ 28.555487] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program [ 28.556549] device lo entered promiscuous mode [ 28.564826] device lo left promiscuous mode [ 28.567123] device lo entered promiscuous mode [ 28.573196] device lo left promiscuous mode [ 28.574404] device lo entered promiscuous mode [ 28.586042] device lo left promiscuous mode [ 28.587045] device lo entered promiscuous mode [ 28.590560] device lo left promiscuous mode [ 28.600690] device lo entered promiscuous mode [ 28.604425] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program [ 28.608869] device lo entered promiscuous mode [ 28.615331] device lo left promiscuous mode [ 28.616662] device lo entered promiscuous mode [ 28.625885] device lo left promiscuous mode [ 28.628635] device lo entered promiscuous mode [ 28.634906] device lo left promiscuous mode [ 28.637370] device lo entered promiscuous mode [ 28.644204] device lo left promiscuous mode [ 28.655721] device lo entered promiscuous mode [ 28.664204] device lo left promiscuous mode [ 28.665587] device lo entered promiscuous mode executing program executing program executing program executing program [ 28.668783] device lo left promiscuous mode [ 28.686412] device lo entered promiscuous mode [ 28.693293] device lo left promiscuous mode [ 28.694821] device lo entered promiscuous mode [ 28.708962] device lo left promiscuous mode [ 28.711961] device lo entered promiscuous mode [ 28.717629] device lo left promiscuous mode [ 28.722222] device lo entered promiscuous mode [ 28.735916] device lo left promiscuous mode [ 28.752217] device lo entered promiscuous mode [ 28.768981] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program [ 28.776158] device lo entered promiscuous mode [ 28.786903] device lo left promiscuous mode [ 28.791366] device lo entered promiscuous mode [ 28.796133] device lo left promiscuous mode [ 28.804701] device lo entered promiscuous mode [ 28.827772] device lo left promiscuous mode [ 28.833994] device lo entered promiscuous mode [ 28.839783] device lo left promiscuous mode [ 28.844810] device lo entered promiscuous mode executing program executing program executing program executing program [ 28.847727] device lo left promiscuous mode [ 28.848784] device lo entered promiscuous mode [ 28.861411] device lo left promiscuous mode [ 28.877105] device lo entered promiscuous mode [ 28.884505] device lo left promiscuous mode [ 28.885696] device lo entered promiscuous mode [ 28.893436] device lo left promiscuous mode [ 28.897280] device lo entered promiscuous mode [ 28.903179] device lo left promiscuous mode [ 28.905420] device lo entered promiscuous mode executing program executing program executing program executing program executing program executing program [ 28.921319] device lo left promiscuous mode [ 28.927358] device lo entered promiscuous mode [ 28.935387] device lo left promiscuous mode [ 28.946640] device lo entered promiscuous mode [ 28.955387] device lo left promiscuous mode [ 28.962343] device lo entered promiscuous mode executing program executing program executing program executing program executing program executing program executing program [ 28.972210] device lo left promiscuous mode [ 28.977704] device lo entered promiscuous mode [ 28.984658] device lo left promiscuous mode [ 28.993095] device lo entered promiscuous mode [ 29.001525] device lo left promiscuous mode [ 29.013212] device lo entered promiscuous mode executing program executing program executing program executing program executing program executing program executing program [ 29.024285] device lo left promiscuous mode [ 29.030295] device lo entered promiscuous mode [ 29.037252] device lo left promiscuous mode [ 29.046436] device lo entered promiscuous mode [ 29.054192] device lo left promiscuous mode [ 29.059810] device lo entered promiscuous mode [ 29.068922] device lo left promiscuous mode executing program executing program executing program [ 29.081756] device lo entered promiscuous mode [ 29.093806] device lo left promiscuous mode [ 29.099550] device lo entered promiscuous mode [ 29.106703] device lo left promiscuous mode [ 29.112468] device lo entered promiscuous mode [ 29.121498] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 29.131389] device lo entered promiscuous mode [ 29.139152] device lo left promiscuous mode [ 29.145343] device lo entered promiscuous mode [ 29.155256] device lo left promiscuous mode [ 29.165049] device lo entered promiscuous mode [ 29.175932] device lo left promiscuous mode executing program executing program executing program executing program executing program [ 29.181252] device lo entered promiscuous mode [ 29.189649] device lo left promiscuous mode [ 29.197518] device lo entered promiscuous mode [ 29.204616] device lo left promiscuous mode [ 29.210124] device lo entered promiscuous mode [ 29.227125] device lo left promiscuous mode executing program executing program executing program executing program executing program [ 29.232868] device lo entered promiscuous mode [ 29.240452] device lo left promiscuous mode [ 29.249425] device lo entered promiscuous mode [ 29.257193] device lo left promiscuous mode [ 29.269050] device lo entered promiscuous mode [ 29.277781] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 29.283749] device lo entered promiscuous mode [ 29.292778] device lo left promiscuous mode [ 29.304855] device lo entered promiscuous mode [ 29.313592] device lo left promiscuous mode [ 29.320028] device lo entered promiscuous mode [ 29.327903] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 29.337926] device lo entered promiscuous mode [ 29.349409] device lo left promiscuous mode [ 29.355146] device lo entered promiscuous mode [ 29.366707] device lo left promiscuous mode [ 29.371909] device lo entered promiscuous mode [ 29.379791] device lo left promiscuous mode executing program executing program executing program executing program [ 29.388102] device lo entered promiscuous mode [ 29.396099] device lo left promiscuous mode [ 29.401842] device lo entered promiscuous mode [ 29.411581] device lo left promiscuous mode [ 29.417484] device lo entered promiscuous mode [ 29.425359] device lo left promiscuous mode executing program executing program executing program [ 29.435971] device lo entered promiscuous mode [ 29.446214] device lo left promiscuous mode [ 29.451978] device lo entered promiscuous mode [ 29.460142] device lo left promiscuous mode [ 29.465486] device lo entered promiscuous mode [ 29.475332] device lo left promiscuous mode [ 29.480750] device lo entered promiscuous mode executing program executing program executing program executing program executing program executing program executing program [ 29.489879] device lo left promiscuous mode [ 29.503389] device lo entered promiscuous mode [ 29.514751] device lo left promiscuous mode [ 29.520223] device lo entered promiscuous mode [ 29.528096] device lo left promiscuous mode [ 29.534564] device lo entered promiscuous mode executing program executing program executing program executing program executing program [ 29.542232] device lo left promiscuous mode [ 29.555136] device lo entered promiscuous mode [ 29.564878] device lo left promiscuous mode [ 29.570499] device lo entered promiscuous mode [ 29.578610] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program [ 29.588984] device lo entered promiscuous mode [ 29.596525] device lo left promiscuous mode [ 29.602231] device lo entered promiscuous mode [ 29.612312] device lo left promiscuous mode [ 29.624948] device lo entered promiscuous mode [ 29.632786] device lo left promiscuous mode executing program [ 29.638619] device lo entered promiscuous mode [ 29.647653] device lo left promiscuous mode [ 29.652993] device lo entered promiscuous mode [ 29.660772] device lo left promiscuous mode [ 29.666914] device lo entered promiscuous mode [ 29.674773] device lo left promiscuous mode [ 29.680143] device lo entered promiscuous mode [ 29.688133] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 29.693690] device lo entered promiscuous mode [ 29.701341] device lo left promiscuous mode [ 29.710940] device lo entered promiscuous mode [ 29.720598] device lo left promiscuous mode [ 29.730491] device lo entered promiscuous mode [ 29.738078] device lo left promiscuous mode executing program executing program executing program executing program executing program [ 29.744191] device lo entered promiscuous mode [ 29.753523] device lo left promiscuous mode [ 29.765931] device lo entered promiscuous mode [ 29.774046] device lo left promiscuous mode [ 29.779878] device lo entered promiscuous mode [ 29.787295] device lo left promiscuous mode executing program executing program executing program executing program executing program [ 29.792758] device lo entered promiscuous mode [ 29.800287] device lo left promiscuous mode [ 29.811008] device lo entered promiscuous mode [ 29.820578] device lo left promiscuous mode [ 29.826139] device lo entered promiscuous mode [ 29.835246] device lo left promiscuous mode executing program executing program executing program executing program executing program [ 29.843670] device lo entered promiscuous mode [ 29.854425] device lo left promiscuous mode [ 29.860549] device lo entered promiscuous mode [ 29.869852] device lo left promiscuous mode [ 29.876114] device lo entered promiscuous mode [ 29.885238] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.892903] device lo entered promiscuous mode [ 29.900423] device lo left promiscuous mode [ 29.911791] device lo entered promiscuous mode [ 29.920151] device lo left promiscuous mode [ 29.925924] device lo entered promiscuous mode [ 29.934313] device lo left promiscuous mode executing program executing program executing program executing program executing program executing program [ 29.946445] device lo entered promiscuous mode [ 29.957947] device lo left promiscuous mode [ 29.964616] device lo entered promiscuous mode [ 29.972755] device lo left promiscuous mode [ 29.982175] device lo entered promiscuous mode executing program executing program [ 29.999824] device lo left promiscuous mode [ 30.008079] device lo entered promiscuous mode [ 30.016500] device lo left promiscuous mode [ 30.022271] device lo entered promiscuous mode [ 30.030410] device lo left promiscuous mode [ 30.035801] device lo entered promiscuous mode [ 30.043779] device lo left promiscuous mode executing program [ 30.049717] device lo entered promiscuous mode [ 30.057797] ================================================================== [ 30.065205] BUG: KASAN: use-after-free in fib6_ifup+0x212/0x220 [ 30.071241] Read of size 8 at addr ffff8801c83b2000 by task syzkaller920794/4756 [ 30.078747] [ 30.080351] CPU: 1 PID: 4756 Comm: syzkaller920794 Not tainted 4.15.0-rc7+ #189 [ 30.087769] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.097105] Call Trace: executing program executing program executing program executing program executing program [ 30.099677] dump_stack+0x194/0x257 [ 30.103296] ? arch_local_irq_restore+0x53/0x53 [ 30.107992] ? show_regs_print_info+0x18/0x18 [ 30.112480] ? fib6_ifup+0x212/0x220 [ 30.116174] print_address_description+0x73/0x250 [ 30.120994] ? fib6_ifup+0x212/0x220 [ 30.124695] kasan_report+0x25b/0x340 [ 30.128496] __asan_report_load8_noabort+0x14/0x20 [ 30.133417] fib6_ifup+0x212/0x220 [ 30.136935] ? fib6_ifdown+0x8b0/0x8b0 [ 30.140806] fib6_clean_node+0x389/0x580 [ 30.144855] ? fib6_del+0x12c0/0x12c0 [ 30.148637] ? fib6_walker_link+0x180/0x210 [ 30.152939] fib6_walk_continue+0x46c/0x8a0 [ 30.157238] ? fib6_ifdown+0x8b0/0x8b0 [ 30.161099] fib6_walk+0x91/0xf0 [ 30.164441] fib6_clean_tree+0x1e6/0x340 [ 30.168479] ? fib6_walk+0xf0/0xf0 [ 30.172000] ? fib6_del+0x12c0/0x12c0 [ 30.175780] ? fib6_ifdown+0x8b0/0x8b0 [ 30.179650] ? __fib6_clean_all+0x1d0/0x3a0 [ 30.184041] __fib6_clean_all+0x1f4/0x3a0 [ 30.188169] ? fib6_ifdown+0x8b0/0x8b0 [ 30.192047] ? fib6_repair_tree.part.21+0xf10/0xf10 [ 30.197052] ? addrconf_notify+0x1472/0x2310 [ 30.201442] ? lock_downgrade+0x980/0x980 [ 30.205567] ? fib6_ifdown+0x8b0/0x8b0 [ 30.209428] fib6_clean_all+0x27/0x30 [ 30.213203] rt6_sync_up+0x15e/0x1c0 [ 30.216890] ? rt6_multipath_rebalance+0xa0/0xa0 [ 30.221622] ? addrconf_notify+0x1472/0x2310 [ 30.226002] ? trace_hardirqs_on+0xd/0x10 [ 30.230129] ? __local_bh_enable_ip+0x121/0x230 [ 30.234777] addrconf_notify+0x3f6/0x2310 [ 30.238913] ? inet6_ifinfo_notify+0x130/0x130 [ 30.243467] ? fib_magic.isra.19+0x49b/0x820 [ 30.247853] ? fib_new_table+0x460/0x460 [ 30.251892] ? nfqnl_rcv_dev_event+0x9a/0x600 [ 30.256361] ? bond_netdev_event+0x131/0xb70 [ 30.260745] ? fib_sync_up+0x350/0x900 [ 30.264604] ? ip6mr_device_event+0x8c/0x340 [ 30.268983] ? instance_destroy_rcu+0x30/0x30 [ 30.273450] ? igmp_netdev_event+0x87/0x750 [ 30.277745] ? tun_device_event+0x73/0xcb0 [ 30.281950] ? mif6_delete+0x620/0x620 [ 30.285809] ? fib_sync_down_dev+0x930/0x930 [ 30.290370] ? nf_tables_flowtable_event+0x27/0x410 [ 30.295365] ? ip_vs_dst_event+0x24c/0x650 [ 30.299571] ? rt_cache_flush+0xd/0x20 [ 30.303439] notifier_call_chain+0x136/0x2c0 [ 30.307819] ? notifier_call_chain+0x136/0x2c0 [ 30.312376] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 30.317810] ? rtnl_is_locked+0x54/0xb0 [ 30.321755] ? rtnl_kfree_skbs+0x70/0x70 [ 30.325794] raw_notifier_call_chain+0x2d/0x40 [ 30.330352] call_netdevice_notifiers_info+0x32/0x70 [ 30.335432] __dev_notify_flags+0x15d/0x430 [ 30.339726] ? __dev_change_flags+0x643/0x9b0 [ 30.344195] ? dev_change_name+0xbe0/0xbe0 [ 30.348410] ? dev_get_by_name_rcu+0x1c8/0x270 [ 30.352975] ? __lock_is_held+0xb6/0x140 [ 30.357024] dev_change_flags+0xf5/0x140 [ 30.361061] ? dev_change_flags+0xf5/0x140 [ 30.366086] devinet_ioctl+0x125b/0x19e0 [ 30.370121] ? avc_has_extended_perms+0x7fa/0x12c0 [ 30.375027] ? find_held_lock+0x35/0x1d0 [ 30.379070] ? inet_ifa_byprefix+0x1f0/0x1f0 [ 30.383451] ? avc_ss_reset+0x110/0x110 [ 30.387402] ? lock_downgrade+0x980/0x980 [ 30.391533] ? __lock_is_held+0xb6/0x140 [ 30.395573] inet_ioctl+0x117/0x1c0 [ 30.399172] ? inet_ioctl+0x117/0x1c0 [ 30.402952] packet_ioctl+0x1ff/0x310 [ 30.406727] ? prb_retire_rx_blk_timer_expired+0x810/0x810 [ 30.412336] sock_do_ioctl+0x65/0xb0 [ 30.416028] sock_ioctl+0x2c2/0x440 [ 30.419630] ? dlci_ioctl_set+0x40/0x40 [ 30.423577] do_vfs_ioctl+0x1b1/0x1520 [ 30.427434] ? _cond_resched+0x14/0x30 [ 30.431301] ? ioctl_preallocate+0x2b0/0x2b0 [ 30.435684] ? selinux_capable+0x40/0x40 [ 30.439722] ? SyS_futex+0x269/0x390 [ 30.443408] ? __fd_install+0x70b/0x740 [ 30.447367] ? security_file_ioctl+0x89/0xb0 [ 30.451752] SyS_ioctl+0x8f/0xc0 [ 30.455098] entry_SYSCALL_64_fastpath+0x23/0x9a [ 30.459832] RIP: 0033:0x44ceb9 [ 30.462992] RSP: 002b:00007f40cf03fce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 30.470679] RAX: ffffffffffffffda RBX: 00000000006dfc24 RCX: 000000000044ceb9 [ 30.477920] RDX: 00000000208a3fe0 RSI: 0000000000008914 RDI: 000000000000005c [ 30.485161] RBP: 00000000006dfc20 R08: 0000000000000000 R09: 0000000000000000 [ 30.492404] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 30.499661] R13: 00007ffeedfab01f R14: 00007f40cf0409c0 R15: 0000000000000001 [ 30.506921] [ 30.508532] Allocated by task 4767: [ 30.512131] save_stack+0x43/0xd0 [ 30.515554] kasan_kmalloc+0xad/0xe0 [ 30.519242] kasan_slab_alloc+0x12/0x20 [ 30.523190] kmem_cache_alloc+0x12e/0x760 [ 30.527307] dst_alloc+0x11f/0x1a0 [ 30.530819] __ip6_dst_alloc+0x35/0x90 [ 30.534677] ip6_dst_alloc+0x29/0xb0 [ 30.538361] ip6_route_info_create+0x4ff/0x2e20 [ 30.543007] ip6_route_add+0xa2/0x190 [ 30.546780] ipv6_route_ioctl+0x4db/0x6b0 [ 30.550901] inet6_ioctl+0xef/0x1e0 [ 30.554498] sock_do_ioctl+0x65/0xb0 [ 30.558183] sock_ioctl+0x2c2/0x440 [ 30.561781] do_vfs_ioctl+0x1b1/0x1520 [ 30.565636] SyS_ioctl+0x8f/0xc0 [ 30.568975] entry_SYSCALL_64_fastpath+0x23/0x9a [ 30.573699] [ 30.575297] Freed by task 4756: [ 30.578546] save_stack+0x43/0xd0 [ 30.581971] kasan_slab_free+0x71/0xc0 [ 30.585831] kmem_cache_free+0x83/0x2a0 [ 30.589777] dst_destroy+0x257/0x370 [ 30.593460] dst_destroy_rcu+0x16/0x20 [ 30.597318] rcu_process_callbacks+0xd6c/0x17f0 [ 30.601959] __do_softirq+0x2d7/0xb85 [ 30.605728] [ 30.607332] The buggy address belongs to the object at ffff8801c83b2000 [ 30.607332] which belongs to the cache ip6_dst_cache of size 320 [ 30.620134] The buggy address is located 0 bytes inside of [ 30.620134] 320-byte region [ffff8801c83b2000, ffff8801c83b2140) [ 30.631802] The buggy address belongs to the page: [ 30.636702] page:ffffea000720ec80 count:1 mapcount:0 mapping:ffff8801c83b2000 index:0x0 [ 30.644816] flags: 0x2fffc0000000100(slab) [ 30.649026] raw: 02fffc0000000100 ffff8801c83b2000 0000000000000000 000000010000000a [ 30.656878] raw: ffffea000730d720 ffffea00071e4160 ffff8801d32c9240 0000000000000000 [ 30.664725] page dumped because: kasan: bad access detected [ 30.670403] [ 30.672003] Memory state around the buggy address: [ 30.676905] ffff8801c83b1f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.684237] ffff8801c83b1f80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.691565] >ffff8801c83b2000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.698891] ^ executing program [ 30.702232] ffff8801c83b2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.709561] ffff8801c83b2100: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.716886] ================================================================== [ 30.724214] Disabling lock debugging due to kernel taint [ 30.729680] Kernel panic - not syncing: panic_on_warn set ... [ 30.729680] [ 30.737030] CPU: 1 PID: 4756 Comm: syzkaller920794 Tainted: G B 4.15.0-rc7+ #189 [ 30.745763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.755115] Call Trace: [ 30.757691] dump_stack+0x194/0x257 [ 30.761300] ? arch_local_irq_restore+0x53/0x53 [ 30.766642] ? kasan_end_report+0x32/0x50 [ 30.770776] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.775506] ? vsnprintf+0x1ed/0x1900 [ 30.779284] ? fib6_ifup+0x210/0x220 [ 30.782981] panic+0x1e4/0x41c [ 30.786174] ? refcount_error_report+0x214/0x214 [ 30.790915] ? add_taint+0x1c/0x50 [ 30.794449] ? add_taint+0x1c/0x50 [ 30.797975] ? fib6_ifup+0x212/0x220 executing program executing program executing program [ 30.801658] kasan_end_report+0x50/0x50 [ 30.805600] kasan_report+0x144/0x340 [ 30.809383] __asan_report_load8_noabort+0x14/0x20 [ 30.814293] fib6_ifup+0x212/0x220 [ 30.817829] ? fib6_ifdown+0x8b0/0x8b0 [ 30.821711] fib6_clean_node+0x389/0x580 [ 30.825758] ? fib6_del+0x12c0/0x12c0 [ 30.829543] ? fib6_walker_link+0x180/0x210 [ 30.833843] fib6_walk_continue+0x46c/0x8a0 [ 30.838143] ? fib6_ifdown+0x8b0/0x8b0 [ 30.842014] fib6_walk+0x91/0xf0 [ 30.845356] fib6_clean_tree+0x1e6/0x340 [ 30.849395] ? fib6_walk+0xf0/0xf0 executing program executing program executing program executing program [ 30.852926] ? fib6_del+0x12c0/0x12c0 [ 30.856699] ? fib6_ifdown+0x8b0/0x8b0 [ 30.860577] ? __fib6_clean_all+0x1d0/0x3a0 [ 30.864898] __fib6_clean_all+0x1f4/0x3a0 [ 30.869033] ? fib6_ifdown+0x8b0/0x8b0 [ 30.872907] ? fib6_repair_tree.part.21+0xf10/0xf10 [ 30.877911] ? addrconf_notify+0x1472/0x2310 [ 30.882305] ? lock_downgrade+0x980/0x980 [ 30.886429] ? fib6_ifdown+0x8b0/0x8b0 [ 30.890292] fib6_clean_all+0x27/0x30 [ 30.894068] rt6_sync_up+0x15e/0x1c0 [ 30.897752] ? rt6_multipath_rebalance+0xa0/0xa0 [ 30.902478] ? addrconf_notify+0x1472/0x2310 [ 30.906858] ? trace_hardirqs_on+0xd/0x10 [ 30.910977] ? __local_bh_enable_ip+0x121/0x230 [ 30.915620] addrconf_notify+0x3f6/0x2310 [ 30.919748] ? inet6_ifinfo_notify+0x130/0x130 [ 30.924304] ? fib_magic.isra.19+0x49b/0x820 [ 30.928694] ? fib_new_table+0x460/0x460 [ 30.932727] ? nfqnl_rcv_dev_event+0x9a/0x600 [ 30.937196] ? bond_netdev_event+0x131/0xb70 [ 30.941578] ? fib_sync_up+0x350/0x900 [ 30.945444] ? ip6mr_device_event+0x8c/0x340 [ 30.949822] ? instance_destroy_rcu+0x30/0x30 [ 30.954285] ? igmp_netdev_event+0x87/0x750 [ 30.958580] ? tun_device_event+0x73/0xcb0 [ 30.962786] ? mif6_delete+0x620/0x620 [ 30.966643] ? fib_sync_down_dev+0x930/0x930 [ 30.971029] ? nf_tables_flowtable_event+0x27/0x410 [ 30.976022] ? ip_vs_dst_event+0x24c/0x650 [ 30.980236] ? rt_cache_flush+0xd/0x20 [ 30.984099] notifier_call_chain+0x136/0x2c0 [ 30.988478] ? notifier_call_chain+0x136/0x2c0 [ 30.993034] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 30.998463] ? rtnl_is_locked+0x54/0xb0 [ 31.002417] ? rtnl_kfree_skbs+0x70/0x70 [ 31.006459] raw_notifier_call_chain+0x2d/0x40 [ 31.011016] call_netdevice_notifiers_info+0x32/0x70 [ 31.016090] __dev_notify_flags+0x15d/0x430 [ 31.020382] ? __dev_change_flags+0x643/0x9b0 [ 31.024847] ? dev_change_name+0xbe0/0xbe0 [ 31.029059] ? dev_get_by_name_rcu+0x1c8/0x270 [ 31.033629] ? __lock_is_held+0xb6/0x140 [ 31.037664] dev_change_flags+0xf5/0x140 [ 31.041695] ? dev_change_flags+0xf5/0x140 [ 31.045907] devinet_ioctl+0x125b/0x19e0 [ 31.049940] ? avc_has_extended_perms+0x7fa/0x12c0 [ 31.054840] ? find_held_lock+0x35/0x1d0 [ 31.058875] ? inet_ifa_byprefix+0x1f0/0x1f0 [ 31.063256] ? avc_ss_reset+0x110/0x110 [ 31.067199] ? lock_downgrade+0x980/0x980 [ 31.071322] ? __lock_is_held+0xb6/0x140 [ 31.075357] inet_ioctl+0x117/0x1c0 [ 31.078956] ? inet_ioctl+0x117/0x1c0 [ 31.082729] packet_ioctl+0x1ff/0x310 [ 31.086500] ? prb_retire_rx_blk_timer_expired+0x810/0x810 [ 31.092114] sock_do_ioctl+0x65/0xb0 [ 31.095802] sock_ioctl+0x2c2/0x440 [ 31.099407] ? dlci_ioctl_set+0x40/0x40 [ 31.103354] do_vfs_ioctl+0x1b1/0x1520 [ 31.107213] ? _cond_resched+0x14/0x30 [ 31.111076] ? ioctl_preallocate+0x2b0/0x2b0 [ 31.115460] ? selinux_capable+0x40/0x40 [ 31.119494] ? SyS_futex+0x269/0x390 [ 31.123179] ? __fd_install+0x70b/0x740 [ 31.127131] ? security_file_ioctl+0x89/0xb0 [ 31.131512] SyS_ioctl+0x8f/0xc0 [ 31.134852] entry_SYSCALL_64_fastpath+0x23/0x9a [ 31.139579] RIP: 0033:0x44ceb9 [ 31.142743] RSP: 002b:00007f40cf03fce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 31.150424] RAX: ffffffffffffffda RBX: 00000000006dfc24 RCX: 000000000044ceb9 [ 31.157667] RDX: 00000000208a3fe0 RSI: 0000000000008914 RDI: 000000000000005c [ 31.164909] RBP: 00000000006dfc20 R08: 0000000000000000 R09: 0000000000000000 [ 31.172151] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 31.179394] R13: 00007ffeedfab01f R14: 00007f40cf0409c0 R15: 0000000000000001 [ 31.187106] Dumping ftrace buffer: [ 31.190624] (ftrace buffer empty) [ 31.194305] Kernel Offset: disabled [ 31.197902] Rebooting in 86400 seconds..