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rand_unix.c: Ensure requests to KERN_ARND don't exceed 256 bytes.

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Requests for more than 256 bytes will fail.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11689)
This commit is contained in:
nia 2020-04-30 14:43:04 +01:00 committed by Matt Caswell
parent 0c27ce7322
commit 7421f08500
1 changed files with 1 additions and 1 deletions
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crypto/rand/rand_unix.c
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@ -250,7 +250,7 @@ static ssize_t sysctl_random(char *buf, size_t buflen)
mib[1] = KERN_ARND;
do {
len = buflen;
len = buflen > 256 ? 256 : buflen;
if (sysctl(mib, 2, buf, &len, NULL, 0) == -1)
return done > 0 ? done : -1;
done += len;