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authorMichael Niedermayer <michael@niedermayer.cc>2022-09-18 14:47:25 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2022-10-21 22:19:37 +0200
commitf8074b797fc392a32a11bff098417358b1a8abe6 (patch)
tree61b56dc3c24f6650f4b496e6c8f26f158c139d9d
parentc91ed5ee63aac0c5e5af6ce365704a38994ac386 (diff)
downloadffmpeg-f8074b797fc392a32a11bff098417358b1a8abe6.tar.gz
avformat/nutdec: Check fields
Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int' Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_NUT_fuzzer-6566001610719232 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 2c146406eac06f3d3cd3d981c29e7affd834cb4d) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r--libavformat/nutdec.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 3d07eb250a..bc2ee7bcd5 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -280,6 +280,11 @@ static int decode_main_header(NUTContext *nut)
for (i = 0; i < 256;) {
int tmp_flags = ffio_read_varlen(bc);
int tmp_fields = ffio_read_varlen(bc);
+ if (tmp_fields < 0) {
+ av_log(s, AV_LOG_ERROR, "fields %d is invalid\n", tmp_fields);
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
+ }
if (tmp_fields > 0)
tmp_pts = get_s(bc);