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commit 200e0cba677b0d478576081ecf12af92b7a4a2d2 Author: Michael Niedermayer <[email protected]> AuthorDate: Sat Jun 6 21:02:16 2026 +0200 Commit: michaelni <[email protected]> CommitDate: Sat Jun 13 21:41:05 2026 +0000 avfilter/estdif: avoid signed overflow in slice boundary calculation deinterlace_slice() computed per-thread row boundaries with int multiplication height * (jobnr + 1). With a tall frame and many filter threads the product overflows signed int before the division by nb_jobs. Use int64_t for the intermediate product before converting back to int row indices. Found-by: Kery (Qi Kery <[email protected]>) Signed-off-by: Michael Niedermayer <[email protected]> --- libavfilter/vf_estdif.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavfilter/vf_estdif.c b/libavfilter/vf_estdif.c index b8289a6e96..6fdfe19e7e 100644 --- a/libavfilter/vf_estdif.c +++ b/libavfilter/vf_estdif.c @@ -354,8 +354,8 @@ static int deinterlace_slice(AVFilterContext *ctx, void *arg, const int height = s->planeheight[plane]; const int src_linesize = in->linesize[plane]; const int dst_linesize = out->linesize[plane]; - const int start = (height * jobnr) / nb_jobs; - const int end = (height * (jobnr+1)) / nb_jobs; + const int start = (int)((int64_t)height * jobnr / nb_jobs); + const int end = (int)((int64_t)height * (jobnr + 1) / nb_jobs); const uint8_t *prev_line, *prev2_line, *next_line, *next2_line, *in_line; const uint8_t *prev3_line, *next3_line; uint8_t *out_line; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
