PR #21782 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21782 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21782.patch
If there is no escape case then reaching that branch is an error Fixes: shift exponent 32 is too large for 32-bit type 'uint32_t' (aka 'unsigned int') Fixes: 472335543/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DST_fuzzer-6682453243920384 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> >From ed010c928ec25a0a14252968d497baa299c236f7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <[email protected]> Date: Sun, 15 Feb 2026 23:57:49 +0100 Subject: [PATCH] avcodec/golomb: Fix get_ur_golomb_jpegls() with esclen = 0 If there is no escape case then reaching that branch is an error Fixes: shift exponent 32 is too large for 32-bit type 'uint32_t' (aka 'unsigned int') Fixes: 472335543/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DST_fuzzer-6682453243920384 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> --- libavcodec/golomb.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/golomb.h b/libavcodec/golomb.h index 742334978d..5169a5a4c0 100644 --- a/libavcodec/golomb.h +++ b/libavcodec/golomb.h @@ -455,7 +455,7 @@ static inline int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, buf = get_bits_long(gb, k); return buf + (i << k); - } else if (i == limit - 1) { + } else if (esc_len && i == limit - 1) { buf = get_bits_long(gb, esc_len); return buf + 1; @@ -512,7 +512,7 @@ static inline int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, } buf += ((SUINT)i << k); - } else if (i == limit - 1) { + } else if (esc_len && i == limit - 1) { buf = SHOW_UBITS(re, gb, esc_len); LAST_SKIP_BITS(re, gb, esc_len); -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
