From: Eric Biggers <ebiggers3@gmail.com>
Date: Sat, 30 May 2015 20:48:06 +0000 (-0500)
Subject: write.c: handle empty buffers in write_wim_resource_from_buffer()
X-Git-Tag: v1.8.2~114
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=bc5975b86ee34a4784dc38f37028ea783dfa45da

write.c: handle empty buffers in write_wim_resource_from_buffer()
---

diff --git a/src/write.c b/src/write.c
index d0ede8bb..5bd8db91 100644
--- a/src/write.c
+++ b/src/write.c
@@ -1747,6 +1747,13 @@ write_wim_resource_from_buffer(const void *buf,
 	int ret;
 	struct blob_descriptor blob;
 
+	if (unlikely(buf_size == 0)) {
+		zero_reshdr(out_reshdr);
+		if (hash_ret)
+			copy_hash(hash_ret, zero_hash);
+		return 0;
+	}
+
 	blob_set_is_located_in_attached_buffer(&blob, (void *)buf, buf_size);
 	sha1_buffer(buf, buf_size, blob.hash);
 	blob.unhashed = 0;