[PATCH 1/3] Decompressors: Check for write errors in decompress_unlzo.c

[Lasse Collin]

From: Lasse Collin <lasse.collin@xxxxxxxxxxx>

The return value of flush() is not checked in unlzo().
This means that the decompressor won't stop even if the
caller doesn't want more data. This can happen e.g. with
a corrupt LZO-compressed initramfs image.

Signed-off-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>
---

--- linux-2.6.37-rc3/lib/decompress_unlzo.c.orig	2010-10-20 23:30:22.000000000 +0300
+++ linux-2.6.37-rc3/lib/decompress_unlzo.c	2010-11-23 12:57:46.000000000 +0200
@@ -190,8 +190,8 @@ STATIC inline int INIT unlzo(u8 *input,
 			}
 		}
 
-		if (flush)
-			flush(out_buf, dst_len);
+		if (flush && flush(out_buf, dst_len) != dst_len)
+			goto exit_2;
 		if (output)
 			out_buf += dst_len;
 		if (posp)
--
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