diff options
Diffstat (limited to 'ext/gd/libgd/gd_gif_in.c')
| -rw-r--r-- | ext/gd/libgd/gd_gif_in.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/ext/gd/libgd/gd_gif_in.c b/ext/gd/libgd/gd_gif_in.c index 491e9422db..f41ec8460a 100644 --- a/ext/gd/libgd/gd_gif_in.c +++ b/ext/gd/libgd/gd_gif_in.c @@ -400,14 +400,14 @@ GetCode_(gdIOCtx *fd, CODE_STATIC_DATA *scd, int code_size, int flag, int *ZeroD scd->lastbit = (2+count)*8 ; } - ret = 0; - for (i = scd->curbit, j = 0; j < code_size; ++i, ++j) - if (i < CSD_BUF_SIZE * 8) { + if ((scd->curbit + code_size - 1) >= (CSD_BUF_SIZE * 8)) { + ret = -1; + } else { + ret = 0; + for (i = scd->curbit, j = 0; j < code_size; ++i, ++j) { ret |= ((scd->buf[i / 8] & (1 << (i % 8))) != 0) << j; - } else { - ret = -1; - break; } + } scd->curbit += code_size; return ret; |