linux-kernel - [PATCH v15 6/9] ext4: Log error when lookup of encoded dentry fails

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: <20240402154842.508032-7-eugen.hristev@collabora.com>
Date: Tue,  2 Apr 2024 18:48:39 +0300
From: Eugen Hristev <eugen.hristev@...labora.com>
To: tytso@....edu,
	adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org,
	jaegeuk@...nel.org,
	chao@...nel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	kernel@...labora.com,
	eugen.hristev@...labora.com,
	viro@...iv.linux.org.uk,
	brauner@...nel.org,
	jack@...e.cz,
	krisman@...e.de,
	Gabriel Krisman Bertazi <krisman@...labora.com>
Subject: [PATCH v15 6/9] ext4: Log error when lookup of encoded dentry fails

From: Gabriel Krisman Bertazi <krisman@...labora.com>

If the volume is in strict mode, ext4_ci_compare can report a broken
encoding name.  This will not trigger on a bad lookup, which is caught
earlier, only if the actual disk name is bad.

Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
Signed-off-by: Eugen Hristev <eugen.hristev@...labora.com>
---
 fs/ext4/namei.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2d0ee232fbe7..3268cf45d9db 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1477,6 +1477,9 @@ static bool ext4_match(struct inode *parent,
 			 * only case where it happens is on a disk
 			 * corruption or ENOMEM.
 			 */
+			if (ret == -EINVAL)
+				EXT4_ERROR_INODE(parent,
+					"Directory contains filename that is invalid UTF-8");
 			return false;
 		}
 		return ret;
-- 
2.34.1