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From:   Jeff Layton <jlayton@kernel.org>
To:     linux-fsdevel@vger.kernel.org
Cc:     linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org,
        linux-cifs@vger.kernel.org, chuck.lever@oracle.com,
        viro@zeniv.linux.org.uk, hch@lst.de,
        Steve French <smfrench@samba.org>
Subject: [PATCH 3/7] cifs: use locks_inode_context helper
Date:   Wed, 16 Nov 2022 10:17:22 -0500
Message-Id: <20221116151726.129217-4-jlayton@kernel.org>
In-Reply-To: <20221116151726.129217-1-jlayton@kernel.org>
References: <20221116151726.129217-1-jlayton@kernel.org>
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cifs currently doesn't access i_flctx safely. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).

Cc: Steve French <smfrench@samba.org>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/cifs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index cd9698209930..6c1431979495 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1413,7 +1413,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
 	struct inode *inode = d_inode(cfile->dentry);
 	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
 	struct file_lock *flock;
-	struct file_lock_context *flctx = inode->i_flctx;
+	struct file_lock_context *flctx = locks_inode_context(inode);
 	unsigned int count = 0, i;
 	int rc = 0, xid, type;
 	struct list_head locks_to_send, *el;
-- 
2.38.1