Commit 6e050778 authored Dec 14, 2007 by Herbert Xu

[CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy



It's better to return silently than crash and burn when someone feeds us
a zero length.  In particular the null digest algorithm when used as part
of authenc will do that to us.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent ce5bd4ac

crypto/scatterwalk.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -105,6 +105,9 @@ void scatterwalk_map_and_copy(void buf, struct scatterlist sg,
		struct scatter_walk walk;
		unsigned int offset = 0;

		if (!nbytes)
		return;

		for (;;) {
		scatterwalk_start(&walk, sg);