linux-kernel - [PATCH] 9p bug fix: return non-zero error value in p9_put

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Message-Id: <1219771831.16125.12.camel@blender>
Date:	Tue, 26 Aug 2008 11:30:31 -0600
From:	Abhishek Kulkarni <kulkarni@...l.gov>
To:	v9fs-developer@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, ericvh@...il.com
Subject: [PATCH] 9p bug fix: return non-zero error value in p9_put_data

p9_put_data is called by p9_create_twrite which expects it to return a
non-zero value on error. This was the reason why every p9_client_write
was failing. This patch also adds a check for buffer overflow in
p9_put_data.

Signed-off-by: Abhishek Kulkarni <kulkarni@...l.gov>
---
 net/9p/conv.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/net/9p/conv.c b/net/9p/conv.c
index 4454720..7f6db15 100644
--- a/net/9p/conv.c
+++ b/net/9p/conv.c
@@ -451,8 +451,11 @@ p9_put_data(struct cbuf *bufp, const char *data,
int count,
 		   unsigned char **pdata)
 {
 	*pdata = buf_alloc(bufp, count);
+	if (buf_check_overflow(bufp))
+		return -EIO;
+
 	memmove(*pdata, data, count);
-	return count;
+	return 0;
 }
 
 static int


Thanks,
 -- Abhishek

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