From 24bd01ea65eb5a9902a0ce8e38f82dcec7117f87 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 5 May 2024 03:14:26 +0200 Subject: [PATCH] tools/target_enc_fuzzer: Only read pix_fmts if its set Fixes: null pointer dereference Fixes: rawvideo encoder Signed-off-by: Michael Niedermayer --- tools/target_enc_fuzzer.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/tools/target_enc_fuzzer.c b/tools/target_enc_fuzzer.c index 1749f6905b..0345595ada 100644 --- a/tools/target_enc_fuzzer.c +++ b/tools/target_enc_fuzzer.c @@ -130,10 +130,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { flags64 = bytestream2_get_le64(&gbc); - int npixfmts = 0; - while (c->p.pix_fmts[npixfmts++] != AV_PIX_FMT_NONE) - ; - ctx->pix_fmt = c->p.pix_fmts[bytestream2_get_byte(&gbc) % npixfmts]; + if (c->p.pix_fmts) { + int npixfmts = 0; + while (c->p.pix_fmts[npixfmts++] != AV_PIX_FMT_NONE) + ; + ctx->pix_fmt = c->p.pix_fmts[bytestream2_get_byte(&gbc) % npixfmts]; + } switch (c->p.id) { case AV_CODEC_ID_FFV1:{