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in repository ffmpeg.

commit 18cc71fc8eb76a541117cfa57b188a7adc0bd980
Author:     Niklas Haas <[email protected]>
AuthorDate: Thu Apr 2 14:03:51 2026 +0200
Commit:     Niklas Haas <[email protected]>
CommitDate: Thu Apr 16 23:25:17 2026 +0200

    swscale/aarch64/ops: fix SWS_OP_LINEAR mask check
    
    The implementation of AARCH64_SWS_OP_LINEAR loops over elements of this mask
    to determine which *output* rows to compute. However, it is being set by 
this
    loop to `op->comps.unused`, which is a mask of unused *input* rows. As such,
    it should be looking at `next->comps.unused` instead.
    
    This did not result in problems in practice, because none of the linear
    matrices happened to trigger this case (more input columns than output 
rows).
    
    Signed-off-by: Niklas Haas <[email protected]>
---
 libswscale/aarch64/ops_impl_conv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libswscale/aarch64/ops_impl_conv.c 
b/libswscale/aarch64/ops_impl_conv.c
index 8f37af0101..19dcf9e3c9 100644
--- a/libswscale/aarch64/ops_impl_conv.c
+++ b/libswscale/aarch64/ops_impl_conv.c
@@ -205,7 +205,7 @@ static int convert_to_aarch64_impl(SwsContext *ctx, const 
SwsOpList *ops, int n,
         out->mask = 0;
         for (int i = 0; i < 4; i++) {
             /* Skip unused or identity rows */
-            if (op->comps.unused[i] || !(op->lin.mask & SWS_MASK_ROW(i)))
+            if (next->comps.unused[i] || !(op->lin.mask & SWS_MASK_ROW(i)))
                 continue;
             MASK_SET(out->mask, i, 1);
             for (int j = 0; j < 5; j++) {

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