================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x30de/0x3210 net/xfrm/xfrm_state.c:1051 Read of size 4 at addr ffff8801ae7ff480 by task syzkaller122003/4444 CPU: 1 PID: 4444 Comm: syzkaller122003 Not tainted 4.16.0-rc6+ #290 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_load4_noabort+0x14/0x20 mm/kasan/report.c:432 xfrm_state_find+0x30de/0x3210 net/xfrm/xfrm_state.c:1051 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1393 [inline] xfrm_tmpl_resolve+0x2ee/0xc40 net/xfrm/xfrm_policy.c:1437 xfrm_resolve_and_create_bundle+0x184/0x28d0 net/xfrm/xfrm_policy.c:1833 xfrm_lookup+0xfcb/0x25c0 net/xfrm/xfrm_policy.c:2163 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2283 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2574 udp_sendmsg+0x19bd/0x2f70 net/ipv4/udp.c:1006 udpv6_sendmsg+0x757/0x3400 net/ipv6/udp.c:1175 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xca/0x110 net/socket.c:639 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2047 __sys_sendmsg+0xe5/0x210 net/socket.c:2081 SYSC_sendmsg net/socket.c:2092 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2088 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x440139 RSP: 002b:00007ffd33a65558 EFLAGS: 00000217 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440139 RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000000000e8 R11: 0000000000000217 R12: 0000000000401a60 R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0006b9ffc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 ffffea0006b90101 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ae7ff380: f2 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2 f2 ffff8801ae7ff400: f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 00 >ffff8801ae7ff480: f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 f2 f2 ^ ffff8801ae7ff500: f2 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ae7ff580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 ==================================================================