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Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renew 

If memory allocation fails for the callback data, we need to put the nfs_client
or we end up with an elevated refcount.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Dave Wysochanski 2017-04-27 10:45:15 -04:00 committed by Trond Myklebust
parent 0048fdd066
commit 5c737cb299
1 changed files with 6 additions and 2 deletions
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8
fs/nfs/nfs4proc.c
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@ -4807,8 +4807,10 @@ static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred,
if (!atomic_inc_not_zero(&clp->cl_count))
return -EIO;
data = kmalloc(sizeof(*data), GFP_NOFS);
if (data == NULL)
if (data == NULL) {
nfs_put_client(clp);
return -ENOMEM;
}
data->client = clp;
data->timestamp = jiffies;
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
@ -7454,8 +7456,10 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
return -EIO;
calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
if (!calldata)
if (!calldata) {
nfs_put_client(clp);
return -ENOMEM;
}
if (!xprt)
nfs4_init_boot_verifier(clp, &verifier);