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NFS: Fix a double unlock from nfs_match,get_client

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[ Upstream commit c260121a97 ]

Now that nfs_match_client drops the nfs_client_lock, we should be
careful
to always return it in the same condition: locked.

Fixes: 950a578c61 ("NFS: make nfs_match_client killable")
Reported-by: syzbot+228a82b263b5da91883d@syzkaller.appspotmail.com
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benjamin Coddington 2019-05-09 07:25:21 -04:00 committed by Greg Kroah-Hartman
parent 1a686177ac
commit 26433652f0
1 changed files with 1 additions and 1 deletions
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2
fs/nfs/client.c
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@ -305,9 +305,9 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
spin_unlock(&nn->nfs_client_lock);
error = nfs_wait_client_init_complete(clp);
nfs_put_client(clp);
spin_lock(&nn->nfs_client_lock);
if (error < 0)
return ERR_PTR(error);
spin_lock(&nn->nfs_client_lock);
goto again;
}