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>
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index c20ef27..c7e0a70 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -446,8 +446,11 @@
const u8 *buff = sg_virt(sg);
int len = sg->length;
- while (len-- && !*buff++)
+ while (len && !*buff) {
lzeros++;
+ len--;
+ buff++;
+ }
if (len && *buff)
break;