X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fmem.c;h=b40a94ce1c6b99596d215c124a04c0d21dd4e422;hb=03c1d9f99d95e19d4940aae8587808924cab486a;hp=73d68b5f0bf84e423b705916d8740c46f4fc8bc2;hpb=364ce53cef64bc00176f864db444a086fc4f6e4f;p=oweals%2Fopenssl.git

diff --git a/crypto/mem.c b/crypto/mem.c
index 73d68b5f0b..b40a94ce1c 100644
--- a/crypto/mem.c
+++ b/crypto/mem.c
@@ -364,6 +364,10 @@ void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
 
 	if (num <= 0) return NULL;
 
+	/* We don't support shrinking the buffer. Note the memcpy that copies
+	 * |old_len| bytes to the new buffer, below. */
+	if (num < old_len) return NULL;
+
 	if (realloc_debug_func != NULL)
 		realloc_debug_func(str, NULL, num, file, line, 0);
 	ret=malloc_ex_func(num,file,line);