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lavfi/showinfo: check plane count before dereferencing.

This commit is contained in:
Clément Bœsch 2012-12-12 02:55:10 +01:00
parent 2fb240ddb6
commit 9138f6da4a
1 changed files with 2 additions and 2 deletions
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4
libavfilter/vf_showinfo.c
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@ -50,7 +50,7 @@ static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
uint32_t plane_checksum[4] = {0}, checksum = 0;
int i, plane, vsub = desc->log2_chroma_h;
for (plane = 0; frame->data[plane] && plane < 4; plane++) {
for (plane = 0; plane < 4 && frame->data[plane]; plane++) {
int64_t linesize = av_image_get_linesize(frame->format, frame->video->w, plane);
uint8_t *data = frame->data[plane];
int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
@ -80,7 +80,7 @@ static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
av_get_picture_type_char(frame->video->pict_type),
checksum, plane_checksum[0]);
for (plane = 1; frame->data[plane] && plane < 4; plane++)
for (plane = 1; plane < 4 && frame->data[plane]; plane++)
av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
av_log(ctx, AV_LOG_INFO, "]\n");