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Adjust the sopt_val pointer on bigendian systems (e.g. MIPS64EB).

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sooptcopyin() checks if size of data provided by user is <= than we can
accept, else it strips down the size. On bigendian platforms we have to
move pointer as well so we copy the actual data.

Reviewed by:	gnn
Sponsored by:	DARPA, AFRL
Sponsored by:	HEIF5
Differential Revision:	https://reviews.freebsd.org/D7980
This commit is contained in:
Ruslan Bukin 2016-09-22 12:41:53 +00:00
parent 2885e9e8b7
commit 30f3bfe58e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306186
1 changed files with 5 additions and 1 deletions
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6
sys/kern/uipc_socket.c
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@ -2455,8 +2455,12 @@ sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen)
*/
if ((valsize = sopt->sopt_valsize) < minlen)
return EINVAL;
if (valsize > len)
if (valsize > len) {
#if _BYTE_ORDER == _BIG_ENDIAN
sopt->sopt_val = (void *)((uintptr_t)sopt->sopt_val + (valsize - len));
#endif
sopt->sopt_valsize = valsize = len;
}
if (sopt->sopt_td != NULL)
return (copyin(sopt->sopt_val, buf, valsize));