From 7fc8ba9068abc4c4cb3fbca4a25b53710ec374b6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 4 Mar 2021 13:06:22 +0100 Subject: [PATCH] avcodec/setts_bsf: Check timebase Fixes: Division by 0 Fixes: 30952/clusterfuzz-testcase-minimized-ffmpeg_BSF_SETTS_fuzzer-6601016202100736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/setts_bsf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/setts_bsf.c b/libavcodec/setts_bsf.c index 5b6b256915..2558e38f51 100644 --- a/libavcodec/setts_bsf.c +++ b/libavcodec/setts_bsf.c @@ -152,7 +152,7 @@ static int setts_filter(AVBSFContext *ctx, AVPacket *pkt) s->var_values[VAR_PREV_OUTDTS] = s->prev_outdts; s->var_values[VAR_STARTPTS] = s->start_pts; s->var_values[VAR_STARTDTS] = s->start_dts; - s->var_values[VAR_TB] = av_q2d(ctx->time_base_out); + s->var_values[VAR_TB] = ctx->time_base_out.den ? av_q2d(ctx->time_base_out) : 0; s->var_values[VAR_SR] = ctx->par_in->sample_rate; new_ts = llrint(av_expr_eval(s->ts_expr, s->var_values, NULL));