================================================================== BUG: KASAN: stack-out-of-bounds in __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:28 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm_dst_hash net/xfrm/xfrm_hash.h:95 [inline] BUG: KASAN: stack-out-of-bounds in xfrm_dst_hash net/xfrm/xfrm_state.c:60 [inline] BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x26a0/0x2910 net/xfrm/xfrm_state.c:807 Read of size 4 at addr ffff88017f11f6b0 by task syz-executor.2/4975 CPU: 0 PID: 4975 Comm: syz-executor.2 Not tainted 4.9.155+ #27 ffff88017f11ee60 ffffffff81b47871 0000000000000000 ffffea0005fc47c0 ffff88017f11f6b0 0000000000000004 ffffffff82656ae0 ffff88017f11ee98 ffffffff81502825 0000000000000000 ffff88017f11f6b0 ffff88017f11f6b0 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] print_address_description+0x6f/0x238 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report mm/kasan/report.c:412 [inline] [] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:397 [] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 [] __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:28 [inline] [] __xfrm_dst_hash net/xfrm/xfrm_hash.h:95 [inline] [] xfrm_dst_hash net/xfrm/xfrm_state.c:60 [inline] [] xfrm_state_find+0x26a0/0x2910 net/xfrm/xfrm_state.c:807 [] xfrm_tmpl_resolve_one+0x1c7/0x7a0 net/xfrm/xfrm_policy.c:1500 [] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1544 [inline] [] xfrm_resolve_and_create_bundle+0x210/0x1e80 net/xfrm/xfrm_policy.c:1896 [] xfrm_lookup+0x200/0xaf0 net/xfrm/xfrm_policy.c:2257 [] xfrm_lookup_route+0x38/0x140 net/xfrm/xfrm_policy.c:2382 [] ip_route_output_flow+0x93/0xa0 net/ipv4/route.c:2448 [] udp_sendmsg+0x1494/0x1c60 net/ipv4/udp.c:1025 [] udpv6_sendmsg+0x12af/0x2430 net/ipv6/udp.c:1086 [] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:770 [] sock_sendmsg_nosec net/socket.c:648 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:658 [] ___sys_sendmsg+0x387/0x8b0 net/socket.c:1982 [] __sys_sendmmsg+0x164/0x3d0 net/socket.c:2072 [] SYSC_sendmmsg net/socket.c:2103 [inline] [] SyS_sendmmsg+0x35/0x60 net/socket.c:2098 [] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb The buggy address belongs to the page: page:ffffea0005fc47c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x4000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88017f11f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 ffff88017f11f600: f1 00 00 00 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 >ffff88017f11f680: 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 ^ ffff88017f11f700: 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 ffff88017f11f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================