linux-kernel - [PATCH] afs: fix possible null pointer dereference in afs_alloc

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Message-ID: <20100530075927.GA4912@hera.kernel.org>
Date:	Sun, 30 May 2010 07:59:27 +0000
From:	Denis Kirjanov <dkirjanov@...a.kernel.org>
To:	dhowells@...hat.com
Cc:	linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] afs: fix possible null pointer dereference in
	afs_alloc_server

Fix possible null pointer dereference since kzalloc can return null

Signed-off-by: Denis Kirjanov <dkirjanov@...nel.org>
---
fs/afs/server.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/fs/afs/server.c b/fs/afs/server.c
index f490995..32e2a91 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -93,7 +93,10 @@ static struct afs_server *afs_alloc_server(struct afs_cell *cell,
 		server->addr.s_addr = addr->s_addr;
 	}
 
-	_leave(" = %p{%d}", server, atomic_read(&server->usage));
+	if (likely(server))
+		_leave(" = %p{%d}", server, atomic_read(&server->usage));
+	else
+		_leave(" = -ENOMEM");
 	return server;
 }
 
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