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avformat/flvdec: Check for avio_read() failure in amf_get_string()

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Suggested-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-26 17:41:28 +01:00
parent 2ef522c918
commit cb31667611
1 changed files with 6 additions and 1 deletions
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7
libavformat/flvdec.c
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@ -384,13 +384,18 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream,
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
{ {
int ret;
int length = avio_rb16(ioc); int length = avio_rb16(ioc);
if (length >= buffsize) { if (length >= buffsize) {
avio_skip(ioc, length); avio_skip(ioc, length);
return -1; return -1;
} }
avio_read(ioc, buffer, length); ret = avio_read(ioc, buffer, length);
if (ret < 0)
return ret;
if (ret < length)
return AVERROR_INVALIDDATA;
buffer[length] = '\0'; buffer[length] = '\0';