linux-kernel - [PATCH 5.4 121/309] f2fs: fix dcache lookup of !casefolded directories

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Date:   Mon, 10 Feb 2020 04:31:17 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 5.4 121/309] f2fs: fix dcache lookup of !casefolded directories

From: Eric Biggers <ebiggers@...gle.com>

commit 5515eae647426169e4b7969271fb207881eba7f6 upstream.

Do the name comparison for non-casefolded directories correctly.

This is analogous to ext4's commit 66883da1eee8 ("ext4: fix dcache
lookup of !casefolded directories").

Fixes: 2c2eb7a300cd ("f2fs: Support case-insensitive file name lookups")
Cc: <stable@...r.kernel.org> # v5.4+
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/f2fs/dir.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -1072,7 +1072,7 @@ static int f2fs_d_compare(const struct d
 	if (!IS_CASEFOLDED(dentry->d_parent->d_inode)) {
 		if (len != name->len)
 			return -1;
-		return memcmp(str, name, len);
+		return memcmp(str, name->name, len);
 	}
 
 	return f2fs_ci_compare(dentry->d_parent->d_inode, name, &qstr, false);