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avformat/ape: more bits in size for less overflows 

Fixes: signed integer overflow: 2147483647 + 3 cannot be represented in type 'int'
Fixes: 46184/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-4678059519770624

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-04-02 22:18:49 +02:00
parent b97e58da44
commit e5f6707a7b
1 changed files with 5 additions and 4 deletions
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9
libavformat/ape.c
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@ -42,8 +42,8 @@
typedef struct APEFrame {
int64_t pos;
int64_t size;
int nblocks;
int size;
int skip;
int64_t pts;
} APEFrame;
@ -128,7 +128,7 @@ static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
for (i = 0; i < ape_ctx->totalframes; i++)
av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
ape_ctx->frames[i].nblocks);
@ -146,7 +146,8 @@ static int ape_read_header(AVFormatContext * s)
AVStream *st;
uint32_t tag;
int i, ret;
int total_blocks, final_size = 0;
int total_blocks;
int64_t final_size = 0;
int64_t pts, file_size;
/* Skip any leading junk such as id3v2 tags */
@ -387,7 +388,7 @@ static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
if (ape->frames[ape->currentframe].size <= 0 ||
ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
ape->frames[ape->currentframe].size);
ape->currentframe++;
return AVERROR(EIO);