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nfs: nfs4clinet: check the return value of kstrdup()

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[ Upstream commit fbd2057e5329d3502a27491190237b6be52a1cb6 ]

kstrdup() returns NULL when some internal memory errors happen, it is
better to check the return value of it so to catch the memory error in
time.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaoke Wang 2021-12-17 01:01:33 +08:00 committed by Greg Kroah-Hartman
parent 2acac498a5
commit 6efe396140
1 changed files with 4 additions and 1 deletions
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5
fs/nfs/nfs4client.c
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@ -1293,8 +1293,11 @@ int nfs4_update_server(struct nfs_server *server, const char *hostname,
} }
nfs_put_client(clp); nfs_put_client(clp);
if (server->nfs_client->cl_hostname == NULL) if (server->nfs_client->cl_hostname == NULL) {
server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL);
if (server->nfs_client->cl_hostname == NULL)
return -ENOMEM;
}
nfs_server_insert_lists(server); nfs_server_insert_lists(server);
return nfs_probe_destination(server); return nfs_probe_destination(server);