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-rw-r--r--crypto/xcbc.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/crypto/xcbc.c b/crypto/xcbc.c
index 86727403e5a..2feb0f239c3 100644
--- a/crypto/xcbc.c
+++ b/crypto/xcbc.c
@@ -124,6 +124,11 @@ static int crypto_xcbc_digest_update2(struct hash_desc *pdesc,
unsigned int offset = sg[i].offset;
unsigned int slen = sg[i].length;
+ if (unlikely(slen > nbytes))
+ slen = nbytes;
+
+ nbytes -= slen;
+
while (slen > 0) {
unsigned int len = min(slen, ((unsigned int)(PAGE_SIZE)) - offset);
char *p = crypto_kmap(pg, 0) + offset;
@@ -177,7 +182,6 @@ static int crypto_xcbc_digest_update2(struct hash_desc *pdesc,
offset = 0;
pg++;
}
- nbytes-=sg[i].length;
i++;
} while (nbytes>0);