================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_flowi_dport include/net/xfrm.h:932 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm6_selector_match net/xfrm/xfrm_policy.c:91 [inline] BUG: KASAN: stack-out-of-bounds in xfrm_selector_match+0xcdc/0xe00 net/xfrm/xfrm_policy.c:104 Read of size 2 at addr ffff8801d0fdf5e4 by task syz-executor1/11437 CPU: 1 PID: 11437 Comm: syz-executor1 Not tainted 4.15.0-rc5+ #177 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_load2_noabort+0x14/0x20 mm/kasan/report.c:428 xfrm_flowi_dport include/net/xfrm.h:932 [inline] __xfrm6_selector_match net/xfrm/xfrm_policy.c:91 [inline] xfrm_selector_match+0xcdc/0xe00 net/xfrm/xfrm_policy.c:104 xfrm_state_look_at.constprop.30+0x113/0x360 net/xfrm/xfrm_state.c:909 xfrm_state_find+0x1595/0x3210 net/xfrm/xfrm_state.c:977 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1394 [inline] xfrm_tmpl_resolve+0x2ee/0xc40 net/xfrm/xfrm_policy.c:1438 xfrm_resolve_and_create_bundle+0x184/0x28d0 net/xfrm/xfrm_policy.c:1829 xfrm_lookup+0x15b2/0x24f0 net/xfrm/xfrm_policy.c:2155 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2273 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2559 udp_sendmsg+0x19d3/0x2ce0 net/ipv4/udp.c:999 udpv6_sendmsg+0x757/0x3400 net/ipv6/udp.c:1156 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fd27aef8c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 00000000201f1000 RDI: 0000000000000013 RBP: 00000000000004a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5060 R13: 00000000ffffffff R14: 00007fd27aef96d4 R15: 0000000000000000 The buggy address belongs to the page: page:00000000673cd29a 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: ffff8801d0fdf480: f1 f1 f1 04 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 ffff8801d0fdf500: f2 f2 f2 f8 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 f2 >ffff8801d0fdf580: f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 ^ ffff8801d0fdf600: 00 00 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 00 ffff8801d0fdf680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================