BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x303d/0x3170 net/xfrm/xfrm_state.c:1042 Read of size 4 at addr ffff8801c1507af8 by task syzkaller374319/2917 CPU: 0 PID: 2917 Comm: syzkaller374319 Not tainted 4.13.0-rc4+ #30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x7f/0x260 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x24e/0x340 mm/kasan/report.c:409 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 xfrm_state_find+0x303d/0x3170 net/xfrm/xfrm_state.c:1042 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1470 [inline] xfrm_tmpl_resolve+0x309/0xbf0 net/xfrm/xfrm_policy.c:1514 xfrm_resolve_and_create_bundle+0x102/0x2080 net/xfrm/xfrm_policy.c:1855 xfrm_lookup+0xd39/0x11c0 net/xfrm/xfrm_policy.c:2216 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2337 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2543 raw_sendmsg+0xc4b/0x38b0 net/ipv4/raw.c:627 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 SYSC_sendto+0x352/0x5a0 net/socket.c:1736 SyS_sendto+0x40/0x50 net/socket.c:1704 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x43ff69 RSP: 002b:00007ffc452f0068 EFLAGS: 00000217 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff69 RDX: 0000000000000000 RSI: 0000000020fdbfc0 RDI: 0000000000000003 RBP: 0000000000000086 R08: 0000000020fdbff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018d0 R13: 0000000000401960 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0006249988 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 ffffea00062499a8 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c1507980: f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 ffff8801c1507a00: f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 >ffff8801c1507a80: 00 00 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 ^ ffff8801c1507b00: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 ffff8801c1507b80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1 ==================================================================