From: trondmy@kernel.org
To: linux-nfs@vger.kernel.org
Subject: [PATCH] NFS: Fix a race in nfs_call_unlink()
Date: Thu, 17 Nov 2022 08:47:13 -0500 [thread overview]
Message-ID: <20221117134713.9069-2-trondmy@kernel.org> (raw)
From: Trond Myklebust <trond.myklebust@hammerspace.com>
We should check that the filehandles match before transferring the
sillyrename data to the newly looked-up dentry in case the name was
reused on the server.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
fs/nfs/unlink.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 9697cd5d2561..150a953a8be9 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -139,6 +139,7 @@ static int nfs_call_unlink(struct dentry *dentry, struct inode *inode, struct nf
*/
spin_lock(&alias->d_lock);
if (d_really_is_positive(alias) &&
+ !nfs_compare_fh(NFS_FH(inode), NFS_FH(d_inode(alias))) &&
!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
devname_garbage = alias->d_fsdata;
alias->d_fsdata = data;
--
2.38.1
reply other threads:[~2022-11-17 13:53 UTC|newest]
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