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NFSv4: Fix a potentially Oopsable condition in __nfs_idmap_unregister 

Ensure that __nfs_idmap_unregister can be called twice without
consequences.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-26 17:26:51 -04:00
parent 6b2fddd3e7
commit d7631250b2
1 changed files with 3 additions and 1 deletions
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4
fs/nfs/idmap.c
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@ -404,8 +404,10 @@ static struct key_type key_type_id_resolver_legacy = {
static void __nfs_idmap_unregister(struct rpc_pipe *pipe) static void __nfs_idmap_unregister(struct rpc_pipe *pipe)
{ {
if (pipe->dentry) if (pipe->dentry) {
rpc_unlink(pipe->dentry); rpc_unlink(pipe->dentry);
pipe->dentry = NULL;
}
} }
static int __nfs_idmap_register(struct dentry *dir, static int __nfs_idmap_register(struct dentry *dir,