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From: Eugen Hristev <eugen.hristev@collabora.com>
To: tytso@mit.edu,
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	Gabriel Krisman Bertazi <krisman@collabora.com>,
	Eric Biggers <ebiggers@google.com>
Subject: [PATCH v12 6/8] ext4: Log error when lookup of encoded dentry fails
Date: Tue, 20 Feb 2024 10:52:33 +0200
Message-Id: <20240220085235.71132-7-eugen.hristev@collabora.com>
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From: Gabriel Krisman Bertazi <krisman@collabora.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.

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

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6e7af8dc4dde..7d357c417475 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