62 lines
1.9 KiB
Diff
62 lines
1.9 KiB
Diff
diff --git a/src/mux/muxi.h b/src/mux/muxi.h
|
|
index 6b57eea..14fd6e2 100644
|
|
--- a/src/mux/muxi.h
|
|
+++ b/src/mux/muxi.h
|
|
|
|
@@ -14,6 +14,7 @@
|
|
#ifndef WEBP_MUX_MUXI_H_
|
|
#define WEBP_MUX_MUXI_H_
|
|
|
|
+#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include "src/dec/vp8i_dec.h"
|
|
#include "src/dec/vp8li_dec.h"
|
|
@@ -143,13 +144,13 @@
|
|
|
|
// Returns size of the chunk including chunk header and padding byte (if any).
|
|
static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) {
|
|
+ assert(chunk_size <= MAX_CHUNK_PAYLOAD);
|
|
return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U);
|
|
}
|
|
|
|
// Size of a chunk including header and padding.
|
|
static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) {
|
|
const size_t data_size = chunk->data_.size;
|
|
- assert(data_size < MAX_CHUNK_PAYLOAD);
|
|
return SizeWithPadding(data_size);
|
|
}
|
|
|
|
|
|
diff --git a/src/mux/muxread.c b/src/mux/muxread.c
|
|
index eb5070b..ef50dae 100644
|
|
--- a/src/mux/muxread.c
|
|
+++ b/src/mux/muxread.c
|
|
|
|
@@ -59,6 +59,7 @@
|
|
// Sanity checks.
|
|
if (data_size < CHUNK_HEADER_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA;
|
|
chunk_size = GetLE32(data + TAG_SIZE);
|
|
+ if (chunk_size > MAX_CHUNK_PAYLOAD) return WEBP_MUX_BAD_DATA;
|
|
|
|
{
|
|
const size_t chunk_disk_size = SizeWithPadding(chunk_size);
|
|
@@ -203,9 +204,14 @@
|
|
goto Err; // First chunk should be VP8, VP8L or VP8X.
|
|
}
|
|
|
|
- riff_size = SizeWithPadding(GetLE32(data + TAG_SIZE));
|
|
+ riff_size = GetLE32(data + TAG_SIZE);
|
|
+ if (riff_size > MAX_CHUNK_PAYLOAD) goto Err;
|
|
+
|
|
+ // Note this padding is historical and differs from demux.c which does not
|
|
+ // pad the file size.
|
|
+ riff_size = SizeWithPadding(riff_size);
|
|
if (riff_size < CHUNK_HEADER_SIZE) goto Err;
|
|
- if (riff_size > MAX_CHUNK_PAYLOAD || riff_size > size) goto Err;
|
|
+ if (riff_size > size) goto Err;
|
|
// There's no point in reading past the end of the RIFF chunk.
|
|
if (size > riff_size + CHUNK_HEADER_SIZE) {
|
|
size = riff_size + CHUNK_HEADER_SIZE;
|
|
|
|
|