================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x30de/0x3210 net/xfrm/xfrm_state.c:1051 Read of size 4 at addr ffff8801cf4bfaf8 by task syz-executor0/12027 CPU: 0 PID: 12027 Comm: syz-executor0 Not tainted 4.14.0-rc7+ #114 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+0x30de/0x3210 net/xfrm/xfrm_state.c:1051 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1387 [inline] xfrm_tmpl_resolve+0x309/0xc00 net/xfrm/xfrm_policy.c:1431 xfrm_resolve_and_create_bundle+0x186/0x24a0 net/xfrm/xfrm_policy.c:1829 xfrm_lookup+0x1574/0x23f0 net/xfrm/xfrm_policy.c:2139 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2257 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2555 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:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 SYSC_sendto+0x352/0x5a0 net/socket.c:1750 SyS_sendto+0x40/0x50 net/socket.c:1718 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x452879 RSP: 002b:00007fc813d5cbe8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 0000000020859000 RDI: 0000000000000016 RBP: 00000000000005a1 R08: 0000000020c24000 R09: 0000000000000010 R10: fffffffffffffffe R11: 0000000000000212 R12: 00000000006f67b8 R13: 00000000ffffffff R14: 00007fc813d5d6d4 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea00073d2fc0 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: ffff8801cf4bf980: f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 ffff8801cf4bfa00: f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 >ffff8801cf4bfa80: 00 00 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 ^ ffff8801cf4bfb00: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 ffff8801cf4bfb80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1 ==================================================================