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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-09-21 16:52:40 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-09-21 16:52:40 -0400
commitf7732d6573c4f29fc1ca5d384bbf82ddfa115030 (patch)
treee0f94b8406908e4e3081afa436a2aa8eed06773d /fs/nfs/unlink.c
parentd3d4152a5d59af9e13a73efa9e9c24383fbe307f (diff)
downloadlinux-stericsson-f7732d6573c4f29fc1ca5d384bbf82ddfa115030.tar.gz
NFS: Fix a use-after-free case in nfs_async_rename()
The call to nfs_async_rename_release() after rpc_run_task() is incorrect. The rpc_run_task() is always guaranteed to call the ->rpc_release() method. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/unlink.c')
-rw-r--r--fs/nfs/unlink.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 698b3e6367ff..47530aacebfd 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -426,7 +426,6 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
.rpc_client = NFS_CLIENT(old_dir),
.flags = RPC_TASK_ASYNC,
};
- struct rpc_task *task;
data = kmalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
@@ -435,7 +434,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
data->cred = rpc_lookup_cred();
if (IS_ERR(data->cred)) {
- task = (struct rpc_task *)data->cred;
+ struct rpc_task *task = ERR_CAST(data->cred);
kfree(data);
return task;
}
@@ -468,11 +467,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
NFS_PROTO(data->old_dir)->rename_setup(&msg, old_dir);
- task = rpc_run_task(&task_setup_data);
- if (IS_ERR(task))
- nfs_async_rename_release(data);
-
- return task;
+ return rpc_run_task(&task_setup_data);
}
/**