From: Scott Mayhew smayhew@redhat.com
[ Upstream commit 18b9a895e652979b70f9c20565394a69354dfebc ]
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: 6ee95d1c8991 ("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: Sasha Levin sashal@kernel.org --- fs/nfsd/nfs4recover.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index cdc75ad4438b..c35c0ebaf722 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -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)