================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x2453/0x2830 net/xfrm/xfrm_state.c:822 Read of size 4 at addr ffff8801c0d17850 by task syzkaller959366/3346 CPU: 0 PID: 3346 Comm: syzkaller959366 Not tainted 4.9.72-gcb7518e #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c0d16ea0 ffffffff81d922b9 ffffea00070345c0 ffff8801c0d17850 0000000000000000 ffff8801c0d17850 ffff8801c9f5b420 ffff8801c0d16ed8 ffffffff8153bab3 ffff8801c0d17850 0000000000000004 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x73/0x280 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report+0x275/0x360 mm/kasan/report.c:408 [] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:428 [] xfrm_state_find+0x2453/0x2830 net/xfrm/xfrm_state.c:822 [] xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1476 [inline] [] xfrm_tmpl_resolve+0x298/0xa90 net/xfrm/xfrm_policy.c:1520 [] xfrm_resolve_and_create_bundle+0xd7/0x1d90 net/xfrm/xfrm_policy.c:1868 [] xfrm_lookup+0x984/0xbf0 net/xfrm/xfrm_policy.c:2222 [] xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2344 [] ip_route_output_flow+0x7f/0xa0 net/ipv4/route.c:2435 [] udp_sendmsg+0xe36/0x1c10 net/ipv4/udp.c:1023 [] udpv6_sendmsg+0x588/0x2540 net/ipv6/udp.c:1086 [] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:770 [] sock_sendmsg_nosec net/socket.c:635 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:645 [] SYSC_sendto+0x2c8/0x340 net/socket.c:1670 [] SyS_sendto+0x40/0x50 net/socket.c:1638 [] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline] [] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384 [] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 The buggy address belongs to the page: page:ffffea00070345c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c0d17700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 ffff8801c0d17780: f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 f2 >ffff8801c0d17800: f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 ^ ffff8801c0d17880: 00 00 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 00 ffff8801c0d17900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================