diff --git a/tools/target_swr_fuzzer.c b/tools/target_swr_fuzzer.c
index b6cdb72a56..9192d4bed5 100644
--- a/tools/target_swr_fuzzer.c
+++ b/tools/target_swr_fuzzer.c
@@ -129,6 +129,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
      in_sample_nb = size / (in_ch_count * av_get_bytes_per_sample(in_sample_fmt));
     out_sample_nb = out_sample_nb % (av_rescale(in_sample_nb, 2*out_sample_rate, in_sample_rate) + 1);
 
+    if (in_sample_nb > 1000*1000 || out_sample_nb > 1000*1000)
+        goto end;
+
     out_data = av_malloc(out_sample_nb * out_ch_count * av_get_bytes_per_sample(out_sample_fmt));
     if (!out_data)
         goto end;