From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "J. Bruce Fields" <bfields@redhat.com>,
Chuck Lever <chuck.lever@oracle.com>,
Sasha Levin <sashal@kernel.org>,
linux-nfs@vger.kernel.org
Subject: [PATCH AUTOSEL 5.13 200/219] nfsd: fix crash on LOCKT on reexported NFSv3
Date: Thu, 9 Sep 2021 07:46:16 -0400 [thread overview]
Message-ID: <20210909114635.143983-200-sashal@kernel.org> (raw)
In-Reply-To: <20210909114635.143983-1-sashal@kernel.org>
From: "J. Bruce Fields" <bfields@redhat.com>
[ Upstream commit 0bcc7ca40bd823193224e9f38bafbd8325aaf566 ]
Unlike other filesystems, NFSv3 tries to use fl_file in the GETLK case.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfsd/nfs4state.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 323d57e72d25..60fd9daf6b3b 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6932,8 +6932,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
/*
* The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
* so we do a temporary open here just to get an open file to pass to
- * vfs_test_lock. (Arguably perhaps test_lock should be done with an
- * inode operation.)
+ * vfs_test_lock.
*/
static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
{
@@ -6948,7 +6947,9 @@ static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct
NFSD_MAY_READ));
if (err)
goto out;
+ lock->fl_file = nf->nf_file;
err = nfserrno(vfs_test_lock(nf->nf_file, lock));
+ lock->fl_file = NULL;
out:
fh_unlock(fhp);
nfsd_file_put(nf);
--
2.30.2
prev parent reply other threads:[~2021-09-09 12:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210909114635.143983-1-sashal@kernel.org>
2021-09-09 11:45 ` [PATCH AUTOSEL 5.13 148/219] rpc: fix gss_svc_init cleanup on failure Sasha Levin
2021-09-09 11:45 ` [PATCH AUTOSEL 5.13 161/219] lockd: lockd server-side shouldn't set fl_ops Sasha Levin
2021-09-09 11:46 ` [PATCH AUTOSEL 5.13 199/219] nfs: don't atempt blocking locks on nfs reexports Sasha Levin
2021-09-09 11:46 ` Sasha Levin [this message]
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