Commit c9bb7fb642 for ffmpeg

commit c9bb7fb6428757dfbe270e92cc91f75723de8f74
Author: Michael Niedermayer <michael@niedermayer.cc>
Date:   Sat Nov 7 22:08:08 2026 +0100

    avutil/frame: count the trailing zeros of the whole cropping offset

    Fixes: passing zero to __builtin_ctz()
    Fixes: bHs7sJdzdvhW

    Found during the review of https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25020

    Passing zero to __builtin_ctz() Replicated through API with UBSAN

diff --git a/libavutil/frame.c b/libavutil/frame.c
index 81b77ba569..c79c1b76d5 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -802,7 +802,7 @@ int av_frame_apply_cropping(AVFrame *frame, int flags)
         int min_log2_align = INT_MAX;

         for (int i = 0; frame->data[i]; i++) {
-            int log2_align = offsets[i] ? ff_ctz(offsets[i]) : INT_MAX;
+            int log2_align = offsets[i] ? ff_ctzll(offsets[i]) : INT_MAX;
             min_log2_align = FFMIN(log2_align, min_log2_align);
         }