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The following commit(s) were added to refs/heads/master by this push:
new fb3012269e avcodec/golomb: Fix get_ur_golomb_jpegls() with esclen = 0
fb3012269e is described below
commit fb3012269e3d768e17f6fc1ebec984648e62910a
Author: Michael Niedermayer <[email protected]>
AuthorDate: Sun Feb 15 23:57:49 2026 +0100
Commit: Michael Niedermayer <[email protected]>
CommitDate: Mon Mar 2 18:41:13 2026 +0100
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);
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