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From:   trondmy@kernel.org
To:     linux-nfs@vger.kernel.org
Subject: [PATCH v2 5/8] NFS: Ensure rpc_run_task() cannot fail in nfs_async_rename()
Date:   Thu,  7 Apr 2022 14:45:58 -0400
Message-Id: <20220407184601.1064640-5-trondmy@kernel.org>
In-Reply-To: <20220407184601.1064640-4-trondmy@kernel.org>
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 <20220407184601.1064640-2-trondmy@kernel.org>
 <20220407184601.1064640-3-trondmy@kernel.org>
 <20220407184601.1064640-4-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

Ensure the call to rpc_run_task() cannot fail by preallocating the
rpc_task.

Fixes: 910ad38697d9 ("NFS: Fix memory allocation in rpc_alloc_task()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/unlink.c         | 1 +
 include/linux/nfs_xdr.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 5fa11e1aca4c..6f325e10056c 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -347,6 +347,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (data == NULL)
 		return ERR_PTR(-ENOMEM);
+	task_setup_data.task = &data->task;
 	task_setup_data.callback_data = data;
 
 	data->cred = get_current_cred();
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 49ba486aea5f..2863e5a69c6a 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1694,6 +1694,7 @@ struct nfs_unlinkdata {
 struct nfs_renamedata {
 	struct nfs_renameargs	args;
 	struct nfs_renameres	res;
+	struct rpc_task		task;
 	const struct cred	*cred;
 	struct inode		*old_dir;
 	struct dentry		*old_dentry;
-- 
2.35.1