Commit 63349d02 authored Oct 18, 2015 by Stephan Mueller Committed by Herbert Xu Oct 20, 2015

lib/mpi: fix off by one in mpi_read_raw_from_sgl



The patch fixes the analysis of the input data which contains an off
by one.

The issue is visible when the SGL contains one byte per SG entry.
The code for checking for zero bytes does not operate on the data byte.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 4a4b0bad

lib/mpi/mpicoder.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -446,8 +446,11 @@ MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int len)
		const u8 *buff = sg_virt(sg);
		int len = sg->length;

		while (len-- && !*buff++)
		while (len && !*buff) {
		lzeros++;
		len--;
		buff++;
		}

		if (len && *buff)
		break;

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