Commit fa8919fd4a for ffmpeg

commit fa8919fd4ad74912316f294716486ef24af97a93
Author: Michael Niedermayer <michael@niedermayer.cc>
Date:   Wed Nov 11 18:53:22 2026 +0100

    avcodec/iff: allocate the plane buffer zeroed

    Fixes: use of uninitialized memory
    Fixes: FPOEGUObScuK
    Fixes: ilbm-vdat-missing.iff
    Use of uninitialized memory Replicated through UnModified FFmpeg with MSAN

    Found during triage of the security report dLFZWeypJpSK

diff --git a/libavcodec/iff.c b/libavcodec/iff.c
index 329a2d9ce3..71cc8b3c33 100644
--- a/libavcodec/iff.c
+++ b/libavcodec/iff.c
@@ -371,7 +371,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
     if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
         return err;
     s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
-    s->planebuf  = av_malloc(s->planesize * avctx->height + AV_INPUT_BUFFER_PADDING_SIZE);
+    s->planebuf  = av_mallocz(s->planesize * avctx->height + AV_INPUT_BUFFER_PADDING_SIZE);
     if (!s->planebuf)
         return AVERROR(ENOMEM);