syzbot

random: sshd: uninitialized urandom read (32 bytes read)
urandom_read: 1 callbacks suppressed
random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1546400560.893:7): avc:  denied  { map } for  pid=1783 comm="syz-executor044" path="/root/syz-executor044447084" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
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BUG: KASAN: stack-out-of-bounds in __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline]
BUG: KASAN: stack-out-of-bounds in __xfrm_dst_hash net/xfrm/xfrm_hash.h:96 [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+0x2519/0x25a0 net/xfrm/xfrm_state.c:953
Read of size 4 at addr ffff8881d07e76d0 by task syz-executor044/1783

CPU: 0 PID: 1783 Comm: syz-executor044 Not tainted 4.14.91+ #1
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 print_address_description+0x60/0x226 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0x88/0x2a5 mm/kasan/report.c:393

The buggy address belongs to the page:
page:ffffea000741f9c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea000741f9e0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d07e7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d07e7600: 00 f1 f1 f1 f1 00 00 00 f2 f2 f2 00 00 00 00 f2
>ffff8881d07e7680: f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00
                                                 ^
 ffff8881d07e7700: 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00
 ffff8881d07e7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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