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Date:   Tue, 13 Sep 2022 19:41:48 -0400
From:   Gabriel Krisman Bertazi <>
        Gabriel Krisman Bertazi <>,, Eric Biggers <>
Subject: [PATCH v9 6/8] ext4: Log error when lookup of encoded dentry fails

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 <>
Signed-off-by: Gabriel Krisman Bertazi <>


changes since v4:
  - Reword error message (Eric)

Changes since v1:
  - reword error message "file in directory" -> "filename" (Eric)
 fs/ext4/namei.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 9c892c58abf2..959346950b3c 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1452,6 +1452,9 @@ 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;

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