This is a note to let you know that I've just added the patch titled
SUNRPC: Fix use of static variable in rpcb_getport_async
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
sunrpc-fix-use-of-static-variable-in-rpcb_getport_async.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From ec0dd267bf7d08cb30e321e45a75fd40edd7e528 Mon Sep 17 00:00:00 2001
From: Ben Greear <[email protected]>
Date: Tue, 12 Jul 2011 10:27:55 -0700
Subject: SUNRPC: Fix use of static variable in rpcb_getport_async
From: Ben Greear <[email protected]>
commit ec0dd267bf7d08cb30e321e45a75fd40edd7e528 upstream.
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 <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/sunrpc/rpcb_clnt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -533,7 +533,7 @@ void rpcb_getport_async(struct rpc_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;
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/sunrpc-fix-use-of-static-variable-in-rpcb_getport_async.patch
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/sunrpc-fix-a-race-between-work-queue-and-rpc_killall_tasks.patch
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