linux-kernel - [PATCH 22/35] union-mount: Call do_whiteout() on unlink and rmdir in unions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1271372682-21225-23-git-send-email-vaurora@redhat.com>
Date:	Thu, 15 Apr 2010 16:04:29 -0700
From:	Valerie Aurora <vaurora@...hat.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Jan Blunck <jblunck@...e.de>,
	Valerie Aurora <vaurora@...hat.com>
Subject: [PATCH 22/35] union-mount: Call do_whiteout() on unlink and rmdir in unions

From: Jan Blunck <jblunck@...e.de>

Call do_whiteout() when removing files and directories from a union
mounted file system.

Signed-off-by: Valerie Aurora <vaurora@...hat.com>
---
 fs/namei.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index b179062..900df0f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2670,6 +2670,10 @@ static long do_rmdir(int dfd, const char __user *pathname)
 	error = mnt_want_write(nd.path.mnt);
 	if (error)
 		goto exit3;
+	if (IS_UNIONED_DIR(&nd.path)) {
+		error = do_whiteout(&nd, &path, 1);
+		goto exit4;
+	}
 	error = security_path_rmdir(&nd.path, path.dentry);
 	if (error)
 		goto exit4;
@@ -2759,6 +2763,10 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 		error = mnt_want_write(nd.path.mnt);
 		if (error)
 			goto exit2;
+		if (IS_UNIONED_DIR(&nd.path)) {
+			error = do_whiteout(&nd, &path, 0);
+			goto exit3;
+		}
 		error = security_path_unlink(&nd.path, path.dentry);
 		if (error)
 			goto exit3;
-- 
1.6.3.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/