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SUNRPC: Fix use of static variable in rpcb_getport_async

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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@candelatech.com>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Ben Greear 2011-07-12 10:27:55 -07:00 committed by Trond Myklebust
parent e5012d1f38
commit ec0dd267bf
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/rpcb_clnt.c
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@ -597,7 +597,7 @@ 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;