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lib/mpi: fix off by one in mpi_read_raw_from_sgl

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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>
This commit is contained in:
Stephan Mueller 2015-10-18 12:45:18 +02:00 committed by Herbert Xu
parent 4a4b0bad06
commit 63349d02c1
1 changed files with 4 additions and 1 deletions
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5
lib/mpi/mpicoder.c
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@ -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;