[FFmpeg-devel] [PATCH 2/5] avcodec/exr: increase vlc depth
Michael Niedermayer
michael at niedermayer.cc
Tue Apr 13 18:45:36 EEST 2021
Fixes: shift exponent -4 is negative
Fixes: 32265/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-465133454137753
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/exr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index 65e5203c31..49c4774145 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -418,7 +418,7 @@ static int huf_decode(VLC *vlc, GetByteContext *gb, int nbits, int run_sym,
init_get_bits(&gbit, gb->buffer, nbits);
while (get_bits_left(&gbit) > 0 && oe < no) {
- uint16_t x = get_vlc2(&gbit, vlc->table, 12, 2);
+ uint16_t x = get_vlc2(&gbit, vlc->table, 12, 3);
if (x == run_sym) {
int run = get_bits(&gbit, 8);
--
2.17.1
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