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Code Issues Releases Activity

fftools/ffmpeg_mux_init: improve error handling in of_add_attachments()

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* return error codes instead of aborting
* avoid leaking the AVIOContext on failure
* check the return code of avio_read()
This commit is contained in:
Anton Khirnov 2023-07-12 13:22:10 +02:00
parent b3eedca5e5
commit eee09cdf39
1 changed files with 35 additions and 9 deletions
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44
fftools/ffmpeg_mux_init.c
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@ -1514,7 +1514,7 @@ loop_end:
}
}
static void of_add_attachments(Muxer *mux, const OptionsContext *o)
static int of_add_attachments(Muxer *mux, const OptionsContext *o)
{
OutputStream *ost;
int err;
@ -1528,20 +1528,42 @@ static void of_add_attachments(Muxer *mux, const OptionsContext *o)
if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
av_log(mux, AV_LOG_FATAL, "Could not open attachment file %s.\n",
o->attachments[i]);
exit_program(1);
return err;
}
if ((len = avio_size(pb)) <= 0) {
av_log(mux, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
o->attachments[i]);
exit_program(1);
err = len ? len : AVERROR_INVALIDDATA;
goto read_fail;
}
if (len > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE ||
!(attachment = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE))) {
if (len > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
av_log(mux, AV_LOG_FATAL, "Attachment %s too large.\n",
o->attachments[i]);
exit_program(1);
err = AVERROR(ERANGE);
goto read_fail;
}
avio_read(pb, attachment, len);
attachment = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE);
if (!attachment) {
err = AVERROR(ENOMEM);
goto read_fail;
}
err = avio_read(pb, attachment, len);
if (err < 0)
av_log(mux, AV_LOG_FATAL, "Error reading attachment file %s: %s\n",
o->attachments[i], av_err2str(err));
else if (err != len) {
av_log(mux, AV_LOG_FATAL, "Could not read all %"PRId64" bytes for "
"attachment file %s\n", len, o->attachments[i]);
err = AVERROR(EIO);
}
read_fail:
avio_closep(&pb);
if (err < 0)
return err;
memset(attachment + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
av_log(mux, AV_LOG_VERBOSE, "Creating attachment stream from file %s\n",
@ -1554,8 +1576,9 @@ static void of_add_attachments(Muxer *mux, const OptionsContext *o)
p = strrchr(o->attachments[i], '/');
av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
avio_closep(&pb);
}
return 0;
}
static int create_streams(Muxer *mux, const OptionsContext *o)
@ -1565,6 +1588,7 @@ static int create_streams(Muxer *mux, const OptionsContext *o)
int auto_disable_a = o->audio_disable;
int auto_disable_s = o->subtitle_disable;
int auto_disable_d = o->data_disable;
int ret;
/* create streams for all unlabeled output pads */
for (int i = 0; i < nb_filtergraphs; i++) {
@ -1611,7 +1635,9 @@ static int create_streams(Muxer *mux, const OptionsContext *o)
map_manual(mux, o, &o->stream_maps[i]);
}
of_add_attachments(mux, o);
ret = of_add_attachments(mux, o);
if (ret < 0)
return ret;
if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
av_dump_format(oc, nb_output_files - 1, oc->url, 1);