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-rw-r--r--lib/lzo/lzo1x_decompress.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/lzo/lzo1x_decompress.c b/lib/lzo/lzo1x_decompress.c
index e6ff708f11..35f3793f31 100644
--- a/lib/lzo/lzo1x_decompress.c
+++ b/lib/lzo/lzo1x_decompress.c
@@ -68,13 +68,14 @@ int lzop_decompress(const unsigned char *src, size_t src_len,
unsigned char *start = dst;
const unsigned char *send = src + src_len;
u32 slen, dlen;
- size_t tmp;
+ size_t tmp, remaining;
int r;
src = parse_header(src);
if (!src)
return LZO_E_ERROR;
+ remaining = *dst_len;
while (src < send) {
/* read uncompressed block size */
dlen = get_unaligned_be32(src);
@@ -93,6 +94,10 @@ int lzop_decompress(const unsigned char *src, size_t src_len,
if (slen <= 0 || slen > dlen)
return LZO_E_ERROR;
+ /* abort if buffer ran out of room */
+ if (dlen > remaining)
+ return LZO_E_OUTPUT_OVERRUN;
+
/* decompress */
tmp = dlen;
r = lzo1x_decompress_safe((u8 *) src, slen, dst, &tmp);
@@ -105,6 +110,7 @@ int lzop_decompress(const unsigned char *src, size_t src_len,
src += slen;
dst += dlen;
+ remaining -= dlen;
}
return LZO_E_INPUT_OVERRUN;
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