BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x30fc/0x3230 net/xfrm/xfrm_state.c:1051 Read of size 4 at addr ffff8801ccc6faf8 by task syzkaller766000/3043 CPU: 1 PID: 3043 Comm: syzkaller766000 Not tainted 4.14.0+ #190 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+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 xfrm_state_find+0x30fc/0x3230 net/xfrm/xfrm_state.c:1051 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1388 [inline] xfrm_tmpl_resolve+0x2fb/0xbd0 net/xfrm/xfrm_policy.c:1432 xfrm_resolve_and_create_bundle+0x11b/0x2600 net/xfrm/xfrm_policy.c:1821 xfrm_lookup+0x1574/0x23f0 net/xfrm/xfrm_policy.c:2146 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2264 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2559 raw_sendmsg+0xc4f/0x3920 net/ipv4/raw.c:633 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763 sock_sendmsg_nosec net/socket.c:632 [inline] sock_sendmsg+0xca/0x110 net/socket.c:642 SYSC_sendto+0x358/0x5a0 net/socket.c:1749 SyS_sendto+0x40/0x50 net/socket.c:1717 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x43ff09 RSP: 002b:00007fffba8d08a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff09 RDX: 0000000000000000 RSI: 0000000020098000 RDI: 0000000000000003 RBP: 0000000000000086 R08: 0000000020c24000 R09: 0000000000000010 R10: fffffffffffffffe R11: 0000000000000217 R12: 0000000000401870 R13: 0000000000401900 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0007331bc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ccc6f980: f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 ffff8801ccc6fa00: f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 >ffff8801ccc6fa80: 00 00 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 ^ ffff8801ccc6fb00: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 ffff8801ccc6fb80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1 ==================================================================