Add check for the return value of av_mallocz() to avoid potential NULL pointer
dereference.
Fixes: 1eeb59a209 ("avfilter/vf_drawtext: improve glyph shaping and
positioning")
Signed-off-by: Jiasheng Jiang <jiashengjiangc...@gmail.com>
---
libavfilter/vf_drawtext.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index 674e1e53c1..2eb144b5bf 100644
--- a/libavfilter/vf_drawtext.c
+++ b/libavfilter/vf_drawtext.c
@@ -1437,6 +1437,11 @@ continue_on_failed:
s->line_count = line_count;
s->lines = av_mallocz(line_count * sizeof(TextLine));
s->tab_clusters = av_mallocz(s->tab_count * sizeof(uint32_t));
+ if (!s->lines || !s->tab_clusters) {
+ ret = AVERROR(ENOMEM);
+ goto done;
+ }
+
for (i = 0; i < s->tab_count; ++i) {
s->tab_clusters[i] = -1;
}
--
2.25.1
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