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avutil/frame: Reimplement av_frame_new_side_data() without size=0 special case

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The size 0 special case causes side data to be created which is
different and a special case if for any reasons size = 0 is passed

Fixes: multiple runtime error: null pointer passed as argument 1, which is declared to never be null
Fixes: 653/clusterfuzz-testcase-5773837415219200

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-02-23 15:19:31 +01:00
parent 58f3469cc6
commit 5804201cba
1 changed files with 29 additions and 26 deletions
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55
libavutil/frame.c
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@ -26,6 +26,11 @@
#include "mem.h"
#include "samplefmt.h"
static AVFrameSideData *frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
AVBufferRef *buf);
MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
@ -344,20 +349,11 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
memcpy(sd_dst->data, sd_src->data, sd_src->size);
} else {
sd_dst = av_frame_new_side_data(dst, sd_src->type, 0);
sd_dst = frame_new_side_data(dst, sd_src->type, av_buffer_ref(sd_src->buf));
if (!sd_dst) {
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
if (sd_src->buf) {
sd_dst->buf = av_buffer_ref(sd_src->buf);
if (!sd_dst->buf) {
wipe_side_data(dst);
return AVERROR(ENOMEM);
}
sd_dst->data = sd_dst->buf->data;
sd_dst->size = sd_dst->buf->size;
}
}
av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
}
@ -633,40 +629,47 @@ AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
return NULL;
}
AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
int size)
static AVFrameSideData *frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
AVBufferRef *buf)
{
AVFrameSideData *ret, **tmp;
if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
if (!buf)
return NULL;
if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
goto fail;
tmp = av_realloc(frame->side_data,
(frame->nb_side_data + 1) * sizeof(*frame->side_data));
if (!tmp)
return NULL;
goto fail;
frame->side_data = tmp;
ret = av_mallocz(sizeof(*ret));
if (!ret)
return NULL;
goto fail;
if (size > 0) {
ret->buf = av_buffer_alloc(size);
if (!ret->buf) {
av_freep(&ret);
return NULL;
}
ret->data = ret->buf->data;
ret->size = size;
}
ret->buf = buf;
ret->data = ret->buf->data;
ret->size = buf->size;
ret->type = type;
frame->side_data[frame->nb_side_data++] = ret;
return ret;
fail:
av_buffer_unref(&buf);
return NULL;
}
AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
enum AVFrameSideDataType type,
int size)
{
return frame_new_side_data(frame, type, av_buffer_alloc(size));
}
AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,