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trusted-keys: check for NULL before using it

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TSS_rawhmac() checks for data != NULL before using it.
We should do the same thing for TSS_authhmac().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2011-01-17 09:25:34 +09:00 committed by James Morris
parent 35576eab39
commit 0e7491f685
1 changed files with 5 additions and 0 deletions
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5
security/keys/trusted_defined.c
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@ -148,6 +148,11 @@ static int TSS_authhmac(unsigned char *digest, const unsigned char *key,
if (dlen == 0)
break;
data = va_arg(argp, unsigned char *);
if (!data) {
ret = -EINVAL;
va_end(argp);
goto out;
}
ret = crypto_shash_update(&sdesc->shash, data, dlen);
if (ret < 0) {
va_end(argp);