Set buffer to NULL to prevent double free (Kamil Dudka at redhat)

Based on the upstream patch d13204e8da43f1d8a98cf3f74591cde02ecdb2f7.

diff --git a/ext/fileinfo/libmagic/buffer.c b/ext/fileinfo/libmagic/buffer.c
index 30cef1acbd50fc0bc2de742e127dd7bb207ed6a7..e6a9c706a95da0b3a68a60cdd4c196ac084617da 100644 (file)
--- a/ext/fileinfo/libmagic/buffer.c
+++ b/ext/fileinfo/libmagic/buffer.c
@@ -83,6 +83,7 @@ buffer_fill(const struct buffer *bb)
                FINFO_READ_FUNC(b->fd, b->ebuf, b->elen) != (ssize_t)b->elen)
        {
                efree(b->ebuf);
+               b->ebuf = NULL;
                goto out;
        }