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-rw-r--r--libavformat/aviobuf.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index f374314fba..0b0748e954 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -223,6 +223,9 @@ int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
return offset1;
offset += offset1;
}
+ if (offset < 0)
+ return AVERROR(EINVAL);
+
offset1 = offset - pos;
if (!s->must_flush && (!s->direct || !s->seek) &&
offset1 >= 0 && offset1 <= buffer_size) {