IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready ================================================================== BUG: KASAN: slab-out-of-bounds in ip6_dst_idev include/net/ip6_fib.h:192 [inline] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 net/ipv6/ip6_output.c:264 Read of size 8 at addr ffff8801b738d818 by task syzkaller426748/4242 CPU: 0 PID: 4242 Comm: syzkaller426748 Not tainted 4.16.0-rc4+ #346 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 ip6_dst_idev include/net/ip6_fib.h:192 [inline] ip6_xmit+0x1f76/0x2260 net/ipv6/ip6_output.c:264 inet6_csk_xmit+0x2fc/0x580 net/ipv6/inet6_connection_sock.c:139 l2tp_xmit_core net/l2tp/l2tp_core.c:1053 [inline] l2tp_xmit_skb+0x105f/0x1410 net/l2tp/l2tp_core.c:1148 pppol2tp_sendmsg+0x470/0x670 net/l2tp/l2tp_ppp.c:341 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 SYSC_sendmsg net/socket.c:2091 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2087 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4418d9 RSP: 002b:00007ffc928778a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00000000004418d9 RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 RBP: 00000000004a343c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 00007ffc92877970 R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801b738d800 which belongs to the cache ip_dst_cache of size 168 The buggy address is located 24 bytes inside of 168-byte region [ffff8801b738d800, ffff8801b738d8a8) The buggy address belongs to the page: page:ffffea0006dce340 count:1 mapcount:0 mapping:ffff8801b738d000 index:0xffff8801b738d000 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801b738d000 ffff8801b738d000 0000000100000009 raw: ffff8801d5bac838 ffffea00072b8f20 ffff8801d5bad680 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b738d700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b738d780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc >ffff8801b738d800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801b738d880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801b738d900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================