From: jvrao <jvrao@linux.vnet.ibm.com>
Date: Wed, 25 Aug 2010 16:27:06 +0000 (+0000)
Subject: net/9p: Add a Warning to catch NULL fids passed to p9_client_clunk().
X-Git-Tag: v2.6.37-rc1~68^2~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8e44a0805fc9d77475060280136aa491aa7d7060;p=thirdparty%2Fkernel%2Flinux.git

net/9p: Add a Warning to catch NULL fids passed to p9_client_clunk().

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
---

diff --git a/net/9p/client.c b/net/9p/client.c
index c155cc45eff96..e50ec802937a2 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1168,6 +1168,12 @@ int p9_client_clunk(struct p9_fid *fid)
 	struct p9_client *clnt;
 	struct p9_req_t *req;
 
+	if (!fid) {
+		P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n");
+		dump_stack();
+		return 0;
+	}
+
 	P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
 	err = 0;
 	clnt = fid->clnt;