Merge cherrypicks of [2890126, 2889507, 2890138, 2890127, 2890128, 2891029, 2891030, 2891031, 2891032, 2891033, 2891034, 2891036, 2891037, 2891038, 2891039, 2891040, 2890763, 2890764, 2890765, 2890766, 2890767, 2890768, 2891129, 2891130, 2891131, 2890139, 2890140, 2890141, 2890142, 2890143, 2890144, 2890145, 2890536, 2891066, 2890146, 2891133, 2891134, 2891135, 2891452, 2891453, 2891454, 2891455, 2891456, 2891457, 2891458, 2890150, 2890151, 2891459, 2891460, 2891461, 2891462, 2891633, 2891638, 2891639, 2891790, 2891808, 2891849, 2891850, 2891759, 2891760, 2891929, 2891930, 2891643, 2891743, 2891716] into nyc-bugfix-release
Change-Id: I1da8552e27abba581d3433e85a5e929fd25ba269
diff --git a/src/crypto/asn1/a_d2i_fp.c b/src/crypto/asn1/a_d2i_fp.c
index 97ec75b..af03bc0 100644
--- a/src/crypto/asn1/a_d2i_fp.c
+++ b/src/crypto/asn1/a_d2i_fp.c
@@ -140,6 +140,7 @@
#endif
#define HEADER_SIZE 8
+#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
{
BUF_MEM *b;
@@ -231,6 +232,7 @@
want=c.slen;
if (want > (len-off))
{
+ size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE;
want-=(len-off);
if (want > INT_MAX /* BIO_read takes an int length */ ||
len+want < len)
@@ -238,23 +240,37 @@
OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG);
goto err;
}
- if (!BUF_MEM_grow_clean(b,len+want))
- {
- OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
- goto err;
- }
while (want > 0)
{
- i=BIO_read(in,&(b->data[len]),want);
- if (i <= 0)
- {
- OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA);
- goto err;
- }
- /* This can't overflow because
- * |len+want| didn't overflow. */
- len+=i;
- want-=i;
+
+ /*
+ * Read content in chunks of increasing size
+ * so we can return an error for EOF without
+ * having to allocate the entire content length
+ * in one go.
+ */
+ size_t chunk = want > chunk_max ? chunk_max : want;
+
+ if (!BUF_MEM_grow_clean(b, len + chunk)) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ want -= chunk;
+ while (chunk > 0) {
+ i = BIO_read(in, &(b->data[len]), chunk);
+ if (i <= 0) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA);
+ goto err;
+ }
+ /*
+ * This can't overflow because |len+want| didn't
+ * overflow.
+ */
+ len += i;
+ chunk -= i;
+ }
+ if (chunk_max < INT_MAX/2)
+ chunk_max *= 2;
}
}
if (off + c.slen < off)
