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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-16 00:31:23 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | e79c52ad014fa94327a50cf4d90bd9aa7221d8c9 (patch) | |
| tree | 2787130a2e9da93627cb662048ea76c243d378c0 | |
| parent | 340ac128a2b941eb55c228d64bffbafcd0e00c74 (diff) | |
| download | ffmpeg-e79c52ad014fa94327a50cf4d90bd9aa7221d8c9.tar.gz | |
avcodec/pnmdec: Use unsigned for maxval rescaling
Fixes: signed integer overflow: 65535 * 55335 cannot be represented in type 'int'
Fixes: 21955/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PGMYUV_fuzzer-5669206981083136
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 49459aca47d4803b2188fbf12b758bd2b01e91d7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pnmdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c index 958c5e43b0..2c98e26934 100644 --- a/libavcodec/pnmdec.c +++ b/libavcodec/pnmdec.c @@ -132,7 +132,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data, init_put_bits(&pb, ptr, linesize); for(j=0; j<avctx->width * components; j++){ unsigned int c=0; - int v=0; + unsigned v=0; if(s->type < 4) while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' )) s->bytestream++; |