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Wed, 18 Feb 2026 14:49:01 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Wed, 18 Feb 2026 12:49:00 -0000 Message-ID: <177141894124.25.9365851382002424239@29965ddac10e> Message-ID-Hash: DFSBJY6LGMUE3NUIXO43VGUD77ZIY47A X-Message-ID-Hash: DFSBJY6LGMUE3NUIXO43VGUD77ZIY47A X-MailFrom: code@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PR] avcodec/golomb: Fix get_ur_golomb_jpegls() with esclen = 0 (PR #21782) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: michaelni via ffmpeg-devel Cc: michaelni Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: 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 >>From ed010c928ec25a0a14252968d497baa299c236f7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer 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 --- 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 -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org