From e85ea8baaa6681a4181cf81703ee726317a5878a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 1 Apr 2024 02:15:07 +0200 Subject: [PATCH] avcodec/exr: Check for remaining bits in huf_unpack_enc_table() Fixes: Timeout Fixes: 67645/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-6308760977997824 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 589fa8a027f3b1707d78d7c45335acc498a5e887) Signed-off-by: Michael Niedermayer --- libavcodec/exr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index b30d3b7404..9f8a015a45 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -334,7 +334,10 @@ static int huf_unpack_enc_table(GetByteContext *gb, return ret; for (; im <= iM; im++) { - uint64_t l = freq[im] = get_bits(&gbit, 6); + uint64_t l; + if (get_bits_left(&gbit) < 6) + return AVERROR_INVALIDDATA; + l = freq[im] = get_bits(&gbit, 6); if (l == LONG_ZEROCODE_RUN) { int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;