virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

avcodec/webp: add assert to ensure palette is not larger than 256

Browse Source 
it should not be possible to be larger as its stored as 8bit value
but we would be overwriting a stack buffer if it is ...

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-10-05 13:00:40 +02:00
parent 19fb476841
commit 436206c175
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
libavcodec/webp.c
View File

@ -1065,6 +1065,7 @@ static int apply_color_indexing_transform(WebPContext *s)
if (img->frame->height * img->frame->width > 300) {
uint8_t palette[256 * 4];
const int size = pal->frame->width * 4;
av_assert0(size <= 1024U);
memcpy(palette, GET_PIXEL(pal->frame, 0, 0), size); // copy palette
// set extra entries to transparent black
memset(palette + size, 0, 256 * 4 - size);