From 0474614e6cf8edcd0077b95772c29fae894a7db9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 5 Jul 2024 02:21:56 +0200 Subject: [PATCH] avcodec/pixlet: Simplify pfx computation Found by reviewing code related to CID1604365 Overflowed constant Sponsored-by: Sovereign Tech Fund Signed-off-by: Michael Niedermayer --- libavcodec/pixlet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index 6b6e39f275..e9c561d70d 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -231,8 +231,8 @@ static int read_high_coeffs(AVCodecContext *avctx, const uint8_t *src, int16_t * if (cnt1 >= length) { cnt1 = get_bits(bc, nbits); } else { - pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14)); - if (pfx < 1 || pfx > 25) + pfx = FFMIN(value, 14); + if (pfx < 1) return AVERROR_INVALIDDATA; cnt1 *= (1 << pfx) - 1; shbits = show_bits(bc, pfx);