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-rw-r--r--crypto/evp/bio_b64.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/evp/bio_b64.c b/crypto/evp/bio_b64.c
index f12eac1b55..6e550f6a43 100644
--- a/crypto/evp/bio_b64.c
+++ b/crypto/evp/bio_b64.c
@@ -165,6 +165,7 @@ static int b64_read(BIO *b, char *out, int outl)
{
i=ctx->buf_len-ctx->buf_off;
if (i > outl) i=outl;
+ OPENSSL_assert(ctx->buf_off+i < sizeof ctx->buf);
memcpy(out,&(ctx->buf[ctx->buf_off]),i);
ret=i;
out+=i;