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authorMichael Niedermayer <michael@niedermayer.cc>2020-06-06 17:50:21 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2020-06-08 20:45:56 +0200
commit8e21379da110ca78f41ff2fe074fd771a1bcd1d0 (patch)
treeeedafe3f0a5fb522e27dd34d1979a446cab40dd3
parent3e651eeac4001820a4b1ac6a31974753288bb9ed (diff)
downloadffmpeg-8e21379da110ca78f41ff2fe074fd771a1bcd1d0.tar.gz
avcodec/pnm: Check scale
Fixes: division by zero Fixes: 22974/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PFM_fuzzer-6270027077779456 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r--libavcodec/pnm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/pnm.c b/libavcodec/pnm.c
index a6ae01b494..aad23c7ae2 100644
--- a/libavcodec/pnm.c
+++ b/libavcodec/pnm.c
@@ -179,7 +179,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32) {
pnm_get(s, buf1, sizeof(buf1));
- if (av_sscanf(buf1, "%f", &s->scale) != 1) {
+ if (av_sscanf(buf1, "%f", &s->scale) != 1 || s->scale == 0.0 || !isfinite(s->scale)) {
av_log(avctx, AV_LOG_ERROR, "Invalid scale.\n");
return AVERROR_INVALIDDATA;
}