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| author | Vincent Sanders <vince@kyllikki.org> | 2017-01-27 14:06:58 +0000 |
|---|---|---|
| committer | Vincent Sanders <vince@kyllikki.org> | 2017-01-27 14:06:58 +0000 |
| commit | f4ccd56c717d4ee3f2f2a0791b5f8134d8a1645e (patch) | |
| tree | 70c00eeb25d62d8c5e322afecac25213a3a09e5b /src | |
| parent | a1617883903bf102af5d6712c9812261efe1ccb9 (diff) | |
| download | libnsgif-f4ccd56c717d4ee3f2f2a0791b5f8134d8a1645e.tar.gz libnsgif-f4ccd56c717d4ee3f2f2a0791b5f8134d8a1645e.tar.bz2 | |
fix the colour table size check to be correct
Diffstat (limited to 'src')
| -rw-r--r-- | src/libnsgif.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libnsgif.c b/src/libnsgif.c index 8422563..9f9bd8d 100644 --- a/src/libnsgif.c +++ b/src/libnsgif.c @@ -62,6 +62,8 @@ #define GIF_BLOCK_TERMINATOR 0x00 #define GIF_TRAILER 0x3b +#define GIF_STANDARD_HEADER_SIZE 13 + /* Internal GIF routines */ static gif_result gif_initialise_sprite(gif_animation *gif, unsigned int width, unsigned int height); static gif_result gif_initialise_frame(gif_animation *gif); @@ -1310,7 +1312,7 @@ gif_result gif_initialise(gif_animation *gif, size_t size, unsigned char *data) if (gif->global_colour_table[0] == GIF_PROCESS_COLOURS) { /* Check for a global colour map signified by bit 7 */ if (gif->global_colours) { - if (gif->buffer_size < (gif->colour_table_size * 3 + 12)) { + if (gif->buffer_size < (gif->colour_table_size * 3 + GIF_STANDARD_HEADER_SIZE)) { return GIF_INSUFFICIENT_DATA; } for (index = 0; index < gif->colour_table_size; index++) { |