linux-kernel - [PATCH 5.4 159/183] afs: Revert "afs: Hide silly-rename files from userspace"

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Message-ID: <20240324234638.1355609-160-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:46:12 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: David Howells <dhowells@...hat.com>,
	Markus Suvanto <markus.suvanto@...il.com>,
	Jeffrey E Altman <jaltman@...istor.com>,
	Marc Dionne <marc.dionne@...istor.com>,
	linux-afs@...ts.infradead.org,
	Christian Brauner <brauner@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 159/183] afs: Revert "afs: Hide silly-rename files from userspace"

From: David Howells <dhowells@...hat.com>

[ Upstream commit 0aec3847d044273733285dcff90afda89ad461d2 ]

This reverts commit 57e9d49c54528c49b8bffe6d99d782ea051ea534.

This undoes the hiding of .__afsXXXX silly-rename files.  The problem with
hiding them is that rm can't then manually delete them.

This also reverts commit 5f7a07646655fb4108da527565dcdc80124b14c4 ("afs: Fix
endless loop in directory parsing") as that's a bugfix for the above.

Fixes: 57e9d49c5452 ("afs: Hide silly-rename files from userspace")
Reported-by: Markus Suvanto <markus.suvanto@...il.com>
Link: https://lists.infradead.org/pipermail/linux-afs/2024-February/008102.html
Signed-off-by: David Howells <dhowells@...hat.com>
Link: https://lore.kernel.org/r/3085695.1710328121@warthog.procyon.org.uk
Reviewed-by: Jeffrey E Altman <jaltman@...istor.com>
cc: Marc Dionne <marc.dionne@...istor.com>
cc: linux-afs@...ts.infradead.org
Signed-off-by: Christian Brauner <brauner@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/afs/dir.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 1ada9b9cb21ec..43f5b972fcead 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -421,16 +421,6 @@ static int afs_dir_iterate_block(struct afs_vnode *dvnode,
 			continue;
 		}
 
-		/* Don't expose silly rename entries to userspace. */
-		if (nlen > 6 &&
-		    dire->u.name[0] == '.' &&
-		    ctx->actor != afs_lookup_filldir &&
-		    ctx->actor != afs_lookup_one_filldir &&
-		    memcmp(dire->u.name, ".__afs", 6) == 0) {
-			ctx->pos = blkoff + next * sizeof(union afs_xdr_dirent);
-			continue;
-		}
-
 		/* found the next entry */
 		if (!dir_emit(ctx, dire->u.name, nlen,
 			      ntohl(dire->u.vnode),
-- 
2.43.0