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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-01-11 12:09:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-01-11 12:09:04 -0800 |
| commit | 93ccb3910ae3dbff6d224aecd22d8eece3d70ce9 (patch) | |
| tree | 9c7ac6bf34675f20a251a455fc33fa46585714c9 | |
| parent | Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux (diff) | |
| parent | SUNRPC: Ensure we release the socket write lock if the rpc_task exits early (diff) | |
| download | linux-dev-93ccb3910ae3dbff6d224aecd22d8eece3d70ce9.tar.xz linux-dev-93ccb3910ae3dbff6d224aecd22d8eece3d70ce9.zip | |
Merge tag 'nfs-for-3.8-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfix from Trond Myklebust:
- Fix a socket lock leak in net/sunrpc/xprt.c
* tag 'nfs-for-3.8-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
SUNRPC: Ensure we release the socket write lock if the rpc_task exits early
| -rw-r--r-- | net/sunrpc/sched.c | 3 | ||||
| -rw-r--r-- | net/sunrpc/xprt.c | 12 |
2 files changed, 11 insertions, 4 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index b4133bd13915..bfa31714581f 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -972,8 +972,7 @@ static void rpc_async_release(struct work_struct *work) static void rpc_release_resources_task(struct rpc_task *task) { - if (task->tk_rqstp) - xprt_release(task); + xprt_release(task); if (task->tk_msg.rpc_cred) { put_rpccred(task->tk_msg.rpc_cred); task->tk_msg.rpc_cred = NULL; diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index bd462a532acf..33811db8788a 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1136,10 +1136,18 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) void xprt_release(struct rpc_task *task) { struct rpc_xprt *xprt; - struct rpc_rqst *req; + struct rpc_rqst *req = task->tk_rqstp; - if (!(req = task->tk_rqstp)) + if (req == NULL) { + if (task->tk_client) { + rcu_read_lock(); + xprt = rcu_dereference(task->tk_client->cl_xprt); + if (xprt->snd_task == task) + xprt_release_write(xprt, task); + rcu_read_unlock(); + } return; + } xprt = req->rq_xprt; if (task->tk_ops->rpc_count_stats != NULL) |