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nfsd: Fix cld_net->cn_tfm initialization 

commit 18b9a895e6 upstream.

Don't assign an error pointer to cld_net->cn_tfm, otherwise an oops will
occur in nfsd4_remove_cld_pipe().

Also, move the initialization of cld_net->cn_tfm so that it occurs after
the check to see if nfsdcld is running.  This is necessary because
nfsd4_client_tracking_init() looks for -ETIMEDOUT to determine whether
to use the "old" nfsdcld tracking ops.

Fixes: 6ee95d1c89 ("nfsd: add support for upcall version 2")
Reported-by: Jamie Heilman <jamie@audible.transient.net>
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Scott Mayhew 2019-11-12 14:01:43 -05:00 committed by Greg Kroah-Hartman
parent 2455e1b819
commit 0efb7388f0
1 changed files with 7 additions and 5 deletions
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12
fs/nfsd/nfs4recover.c
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@ -1578,6 +1578,7 @@ nfsd4_cld_tracking_init(struct net *net)
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
bool running;
int retries = 10;
struct crypto_shash *tfm;
status = nfs4_cld_state_init(net);
if (status)
@ -1586,11 +1587,6 @@ nfsd4_cld_tracking_init(struct net *net)
status = __nfsd4_init_cld_pipe(net);
if (status)
goto err_shutdown;
nn->cld_net->cn_tfm = crypto_alloc_shash("sha256", 0, 0);
if (IS_ERR(nn->cld_net->cn_tfm)) {
status = PTR_ERR(nn->cld_net->cn_tfm);
goto err_remove;
}
/*
* rpc pipe upcalls take 30 seconds to time out, so we don't want to
@ -1607,6 +1603,12 @@ nfsd4_cld_tracking_init(struct net *net)
status = -ETIMEDOUT;
goto err_remove;
}
tfm = crypto_alloc_shash("sha256", 0, 0);
if (IS_ERR(tfm)) {
status = PTR_ERR(tfm);
goto err_remove;
}
nn->cld_net->cn_tfm = tfm;
status = nfsd4_cld_get_version(nn);
if (status == -EOPNOTSUPP)