From nobody Sat Oct 4 19:18:45 2025 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 993343002B3; Wed, 13 Aug 2025 22:37:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.97.179.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755124668; cv=none; b=KjkdzI3MDRJ6FPPzNDdvRXVx2TZ50+tKQFjHUbd91z5wogigxbM7kwhSP9niaspddNJX2O5zXXMG+13vQTXP2CkfS1bbwFAD6gl80KcxBpV/ILWu6W0jy+6PAvzPoG7SdkMCBfRMy2MKGFAqcMAdrJht/iS7/K7WDYFOKgdYRec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755124668; c=relaxed/simple; bh=QHij3AaEqB5Gm/MJ+xxCWHvXRMF3eJjlbymbW1o6oL0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eW+aC6irjlY7tNX4onOvDFS4cvkSg4NmTIAWBENqvvHBRNCNB3lCda5o0BQYRgOs5v3v3HzdXAUQ+3IBeFiGHDgUEW8dm18gjUzhuNStwlPyRgOrfSrxp/40JsrrBSJwfoguzqNrNrDkyVVW234cG2tsbvWmO1LGStk+ikrBnVA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=G2vsXMgx; arc=none smtp.client-ip=213.97.179.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="G2vsXMgx" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Cc:To:In-Reply-To:References:Message-Id: Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date:From:Sender: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=T/YfUC/mXfWI3UBte6AV9vZQ18fOmpiqBAEfdLjA9sg=; b=G2vsXMgxepdjvoBJinbWly9da5 IhbatT2/vAZCAlBve6NTHwurStWBEtwwQsBOTomsak87uy42C4QTkPY9rLN9DCIBDlXbIm2kAqWLb gnC6GxqHYC/kj0zeYKpprNtnp/I3vRGE25QgyhMT6fFZI2xqUCgsZZsN8wSfbkA0tVhNYzJHTa6ZE Nl7RR0epGCqLc1w+9XESQeYln6/lFmfWXqFKNcO7LBGsp6Iqv9jdAx55k8oFVfXaqELw/AqFPxTB/ Spb66QaRCzTcbF2iXmU7WExz8e+UtdjiE4FOPjvESPiA93dqZrSRChMKlOpzEe5B72U+458OuJOZL 4KJP+R1g==; Received: from [152.250.7.37] (helo=[192.168.15.100]) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1umK6H-00Ds0c-Mz; Thu, 14 Aug 2025 00:37:41 +0200 From: =?utf-8?q?Andr=C3=A9_Almeida?= Date: Wed, 13 Aug 2025 19:36:44 -0300 Subject: [PATCH v4 8/9] ovl: Check for casefold consistency when creating new dentries Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250813-tonyk-overlayfs-v4-8-357ccf2e12ad@igalia.com> References: <20250813-tonyk-overlayfs-v4-0-357ccf2e12ad@igalia.com> In-Reply-To: <20250813-tonyk-overlayfs-v4-0-357ccf2e12ad@igalia.com> To: Miklos Szeredi , Amir Goldstein , Theodore Tso , Gabriel Krisman Bertazi Cc: linux-unionfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Alexander Viro , Christian Brauner , Jan Kara , kernel-dev@igalia.com, =?utf-8?q?Andr=C3=A9_Almeida?= X-Mailer: b4 0.14.2 In a overlayfs with casefold enabled, all new dentries should have casefold enabled as well. Check this at ovl_create_real() Signed-off-by: Andr=C3=A9 Almeida --- Changes from v3: - New patch --- fs/overlayfs/dir.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c index 70b8687dc45e8e33079c865ae302ac58464224a6..be8c5d02302de7a3ee63220a69f= 99a808fde3128 100644 --- a/fs/overlayfs/dir.c +++ b/fs/overlayfs/dir.c @@ -187,6 +187,11 @@ struct dentry *ovl_create_real(struct ovl_fs *ofs, str= uct dentry *parent, /* mkdir is special... */ newdentry =3D ovl_do_mkdir(ofs, dir, newdentry, attr->mode); err =3D PTR_ERR_OR_ZERO(newdentry); + /* expect to inherit casefolding from workdir/upperdir */ + if (!err && ofs->casefold !=3D ovl_dentry_casefolded(newdentry)) { + dput(newdentry); + err =3D -EINVAL; + } break; =20 case S_IFCHR: --=20 2.50.1