From 90ff3ae9769dc79fd18400eedc97c352fa73926d Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 30 Nov 2024 02:37:44 +0100 Subject: [PATCH] tools/target_swr_fuzzer: do not use negative numbers of samples Fixes: signed integer overflow: -277109688 * 8 cannot be represented in type 'int' Fixes: 376118159/clusterfuzz-testcase-minimized-ffmpeg_SWR_fuzzer-5884436320681984 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- tools/target_swr_fuzzer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/target_swr_fuzzer.c b/tools/target_swr_fuzzer.c index 9192d4bed5..f154a11632 100644 --- a/tools/target_swr_fuzzer.c +++ b/tools/target_swr_fuzzer.c @@ -98,7 +98,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { av_channel_layout_copy(& in_ch_layout, &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]); av_channel_layout_copy(&out_ch_layout, &layouts[bytestream2_get_byte(&gbc) % FF_ARRAY_ELEMS(layouts)]); - out_sample_nb = bytestream2_get_le32(&gbc); + out_sample_nb = bytestream2_get_le32(&gbc) & 0x7FFFFFFF; flags64 = bytestream2_get_le64(&gbc); if (flags64 & 0x10)