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nutdec: abort if EOF is reached in decode_info_header/read_sm_data 

These loops can take a lot of time if count is very large.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-05-20 00:34:42 +02:00
parent 265d884eb0
commit bb23a15df5
1 changed files with 12 additions and 4 deletions
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16
libavformat/nutdec.c
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@ -492,7 +492,7 @@ static int decode_info_header(NUTContext *nut)
AVIOContext *bc = s->pb;
uint64_t tmp, chapter_start, chapter_len;
unsigned int stream_id_plus1, count;
int chapter_id, i;
int chapter_id, i, ret;
int64_t value, end;
char name[256], str_value[1024], type_str[256];
const char *type;
@ -534,7 +534,11 @@ static int decode_info_header(NUTContext *nut)
}
for (i = 0; i < count; i++) {
get_str(bc, name, sizeof(name));
ret = get_str(bc, name, sizeof(name));
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "get_str failed while decoding info header\n");
return ret;
}
value = get_s(bc);
str_value[0] = 0;
@ -852,14 +856,18 @@ static int read_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int
int sample_rate = 0;
int width = 0;
int height = 0;
int i;
int i, ret;
for (i=0; i<count; i++) {
uint8_t name[256], str_value[256], type_str[256];
int value;
if (avio_tell(bc) >= maxpos)
return AVERROR_INVALIDDATA;
get_str(bc, name, sizeof(name));
ret = get_str(bc, name, sizeof(name));
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "get_str failed while reading sm data\n");
return ret;
}
value = get_s(bc);
if (value == -1) {