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Check error return from sysconf in secure memory code 

We use the sysconf function to provide details about the page size in the
secure memory code. This function can return -1 on error so we should check
for this before proceeding.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
This commit is contained in:
Matt Caswell 2015-11-12 15:11:34 +00:00
parent ae4d0c8d22
commit 9ae720b4dc
1 changed files with 12 additions and 2 deletions
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14
crypto/sec_mem.c
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@ -333,8 +333,18 @@ static int sh_init(size_t size, int minsize)
goto err;
/* Allocate space for heap, and two extra pages as guards */
#ifdef _SC_PAGE_SIZE
pgsize = (size_t)sysconf(_SC_PAGE_SIZE);
#if defined(_SC_PAGE_SIZE) || defined (_SC_PAGESIZE)
{
# if defined(_SC_PAGE_SIZE)
long tmppgsize = sysconf(_SC_PAGE_SIZE);
# else
long tmppgsize = sysconf(_SC_PAGESIZE);
# endif
if (tmppgsize < 1)
pgsize = PAGE_SIZE;
else
pgsize = (size_t)tmppgsize;
}
#else
pgsize = PAGE_SIZE;
#endif