diff options
author | Michael Niedermayer <michaelni@gmx.at> | 2006-05-13 15:37:56 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2006-05-13 15:37:56 +0400 |
commit | a443a2530d00b7019269202ac0f5ca8ba0a021c7 (patch) | |
tree | 9dfe3c9388c09a10ef32b64a871d3dac45495cb5 /libavformat/rm.c | |
parent | 3a1a7e32ace7af47de74e8ae779cb4e04c89aa97 (diff) |
sanity checks some might have been exploitable
Originally committed as revision 5370 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/rm.c')
-rw-r--r-- | libavformat/rm.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libavformat/rm.c b/libavformat/rm.c index c9c1b2aaa4..f195aa3d1d 100644 --- a/libavformat/rm.c +++ b/libavformat/rm.c @@ -555,6 +555,12 @@ static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, st->codec->extradata_size= 0; rm->audio_framesize = st->codec->block_align; st->codec->block_align = coded_framesize; + + if(rm->audio_framesize >= UINT_MAX / sub_packet_h){ + av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); + return -1; + } + rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); } else if (!strcmp(buf, "cook")) { int codecdata_length, i; @@ -562,6 +568,11 @@ static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, if (((version >> 16) & 0xff) == 5) get_byte(pb); codecdata_length = get_be32(pb); + if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ + av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); + return -1; + } + st->codec->codec_id = CODEC_ID_COOK; st->codec->extradata_size= codecdata_length; st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); @@ -569,6 +580,12 @@ static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, ((uint8_t*)st->codec->extradata)[i] = get_byte(pb); rm->audio_framesize = st->codec->block_align; st->codec->block_align = rm->sub_packet_size; + + if(rm->audio_framesize >= UINT_MAX / sub_packet_h){ + av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); + return -1; + } + rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); } else { st->codec->codec_id = CODEC_ID_NONE; @@ -715,6 +732,12 @@ static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) get_be16(pb); st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos); + + if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){ + //check is redundant as get_buffer() will catch this + av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n"); + return -1; + } st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); get_buffer(pb, st->codec->extradata, st->codec->extradata_size); |