BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x2453/0x2830 net/xfrm/xfrm_state.c:822 at addr ffff8801cdb3fb50
Read of size 4 by task syzkaller159177/3245
page:ffffea000736cfc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected
CPU: 1 PID: 3245 Comm: syzkaller159177 Not tainted 4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cdb3f198 ffffffff81d93149 ffffed0039b67f6a 0000000000000004
 0000000000000000 ffffed0039b67f6a ffff8801cdb3fb50 ffff8801cdb3f220
 ffffffff8153d143 0000000000000000 0000000000000002 ffffffff833d3373
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d143>] print_address_description mm/kasan/report.c:208 [inline]
 [<ffffffff8153d143>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153d143>] kasan_report.part.1+0x4c3/0x500 mm/kasan/report.c:309
 [<ffffffff8153d209>] kasan_report mm/kasan/report.c:329 [inline]
 [<ffffffff8153d209>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329
 [<ffffffff833d3373>] xfrm_state_find+0x2453/0x2830 net/xfrm/xfrm_state.c:822
 [<ffffffff833b8778>] xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1475 [inline]
 [<ffffffff833b8778>] xfrm_tmpl_resolve+0x298/0xa90 net/xfrm/xfrm_policy.c:1519
 [<ffffffff833b9147>] xfrm_resolve_and_create_bundle+0xd7/0x1d50 net/xfrm/xfrm_policy.c:1866
 [<ffffffff833be9c4>] xfrm_lookup+0x984/0xbf0 net/xfrm/xfrm_policy.c:2220
 [<ffffffff833bfb29>] xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2342
 [<ffffffff831da0bf>] ip_route_output_flow+0x7f/0xa0 net/ipv4/route.c:2431
 [<ffffffff832b6cd6>] udp_sendmsg+0xe36/0x1c10 net/ipv4/udp.c:1026
 [<ffffffff832e9fec>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753
 [<ffffffff82ecfb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ecfb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed0af8>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82ed2fa0>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Memory state around the buggy address:
 ffff8801cdb3fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
 ffff8801cdb3fa80: f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 f2
>ffff8801cdb3fb00: f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00
                                                 ^
 ffff8801cdb3fb80: 00 00 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 00
 ffff8801cdb3fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
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BUG: KASAN: stack-out-of-bounds in __xfrm_dst_hash net/xfrm/xfrm_hash.h:90 [inline] at addr ffff8801cdb3fb50
BUG: KASAN: stack-out-of-bounds in xfrm_dst_hash net/xfrm/xfrm_state.c:60 [inline] at addr ffff8801cdb3fb50
BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0xc9b/0x2830 net/xfrm/xfrm_state.c:822 at addr ffff8801cdb3fb50
Read of size 4 by task syzkaller159177/3245
page:ffffea000736cfc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected