Commit 4369bd1258 for aom

commit 4369bd1258dc99fa759916d9aba6509cdda9d877
Author: James Zern <jzern@google.com>
Date:   Fri Mar 27 10:56:13 2026 -0700

    av1_nonrd_pick_inter_mode_sb: add missing ref_frame_flags check

    Before calling `set_block_source_sad()` ensure `LAST_FRAME` is
    available. Fixes a crash that may present as a use after free (UAF).

    Bug: 495477995, 495996858
    Change-Id: I61452ce412fb9071c3370b4350ed8878013a8355

diff --git a/av1/encoder/nonrd_pickmode.c b/av1/encoder/nonrd_pickmode.c
index f201006232..0f2a1c780a 100644
--- a/av1/encoder/nonrd_pickmode.c
+++ b/av1/encoder/nonrd_pickmode.c
@@ -3440,6 +3440,7 @@ void av1_nonrd_pick_inter_mode_sb(AV1_COMP *cpi, TileDataEnc *tile_data,
       !x->force_zeromv_skip_for_blk &&
       x->content_state_sb.source_sad_nonrd != kZeroSad &&
       x->source_variance == 0 && bsize < cm->seq_params->sb_size &&
+      (cpi->ref_frame_flags & AOM_LAST_FLAG) &&
       search_state.yv12_mb[LAST_FRAME][0].width == cm->width &&
       search_state.yv12_mb[LAST_FRAME][0].height == cm->height) {
     set_block_source_sad(cpi, x, bsize, &search_state.yv12_mb[LAST_FRAME][0]);