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Date: Tue, 12 Jul 2011 10:27:55 -0700 From: greearb@...delatech.com To: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Ben Greear <greearb@...delatech.com> Subject: [PATCH] SUNRPC: Fix use of static variable in rpcb_getport_async From: Ben Greear <greearb@...delatech.com> Because struct rpcbind_args *map was declared static, if two threads entered this method at the same time, the values assigned to map could be sent two two differen tasks. This could cause all sorts of problems, include use-after-free and double-free of memory. Fix this by removing the static declaration so that the map pointer is on the stack. Signed-off-by: Ben Greear <greearb@...delatech.com> --- :100644 100644 353234c... 1695c73... M net/sunrpc/rpcb_clnt.c net/sunrpc/rpcb_clnt.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index 353234c..1695c73 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -600,7 +600,7 @@ void rpcb_getport_async(struct rpc_task *task) u32 bind_version; struct rpc_xprt *xprt; struct rpc_clnt *rpcb_clnt; - static struct rpcbind_args *map; + struct rpcbind_args *map; struct rpc_task *child; struct sockaddr_storage addr; struct sockaddr *sap = (struct sockaddr *)&addr; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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