hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
==================================================================
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:46 [inline]
BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x23f5/0x24c0 net/xfrm/xfrm_state.c:783
Read of size 4 at addr ffff8801af8279c0 by task syz-executor.4/12302

CPU: 1 PID: 12302 Comm: syz-executor.4 Not tainted 4.4.174+ #4
 0000000000000000[  379.141768] hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
 314ed3fbde2cb256 ffff8801af827180 ffffffff81aad1a1
 0000000000000000 ffffea0006be09c0 ffff8801af8279c0 0000000000000004
 0000000000000002 ffff8801af8271b8 ffffffff81490120 0000000000000000
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81490120>] print_address_description+0x6f/0x21b mm/kasan/report.c:252
 [<ffffffff81490358>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81490358>] kasan_report mm/kasan/report.c:408 [inline]
 [<ffffffff81490358>] kasan_report.cold+0x8c/0x2be mm/kasan/report.c:393
 [<ffffffff81484eb4>] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:428
 [<ffffffff82566ab5>] __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:28 [inline]
 [<ffffffff82566ab5>] __xfrm_dst_hash net/xfrm/xfrm_hash.h:95 [inline]
 [<ffffffff82566ab5>] xfrm_dst_hash net/xfrm/xfrm_state.c:46 [inline]
 [<ffffffff82566ab5>] xfrm_state_find+0x23f5/0x24c0 net/xfrm/xfrm_state.c:783
 [<ffffffff8254d467>] xfrm_tmpl_resolve_one+0x1c7/0x790 net/xfrm/xfrm_policy.c:1455
 [<ffffffff8254dc40>] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1499 [inline]
 [<ffffffff8254dc40>] xfrm_resolve_and_create_bundle+0x210/0x1df0 net/xfrm/xfrm_policy.c:1847
 [<ffffffff82550ba3>] xfrm_lookup+0x203/0xad0 net/xfrm/xfrm_policy.c:2204
 [<ffffffff82552338>] xfrm_lookup_route+0x38/0x140 net/xfrm/xfrm_policy.c:2326
 [<ffffffff823a5a23>] ip_route_output_flow+0x93/0xa0 net/ipv4/route.c:2437
 [<ffffffff8247fa07>] udp_sendmsg+0x1537/0x1c60 net/ipv4/udp.c:1040
 [<ffffffff826137a2>] udpv6_sendmsg+0x12f2/0x24f0 net/ipv6/udp.c:1173
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821dc4f1>] SYSC_sendto net/socket.c:1678 [inline]
 [<ffffffff821dc4f1>] SyS_sendto+0x201/0x340 net/socket.c:1646
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a

The buggy address belongs to the page:
page:ffffea0006be09c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801af827880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
 ffff8801af827900: f1 f1 f1 00 00 00 f2 f2 f2 00 00 00 f2 f2 f2 f2
>ffff8801af827980: f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 00
                                           ^
 ffff8801af827a00: 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00
 ffff8801af827a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================