From nobody Sat Feb 7 20:44:01 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 7D9F819D8BC for ; Fri, 9 Jan 2026 02:47:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767926846; cv=none; b=F4wnxTpSFWwVUbk7uxhqSokr6Z0ZL+IaYQW31zQdiAZuxJyWI+poAPZjaYeujlyLwlMyIOHevv3HDBzQJVhanN0Rp4NlKTuDRl3nX7fBQQg19KeqrA1CfKwNoLQzAmhdoVZ3vh4YxByu8Bu1am5VOwc9S5sPKJbjXDGpoyhEPbA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767926846; c=relaxed/simple; bh=eR/mcmTUhW/HJ7Lb31/8v2Nu+WpkjxC3P5rB1CqxdTk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=dlbLzxgF88XsOY7/p+8Zkvi6w3ykdrq2t3P6KCxVFRKSXct4A6mJd1K/j7N5MgKy4Sr4s0YP1R/JcX6UuRgn4wE18WNawYvt4rXcdC+S99AwBuLall5dHa7+tdDW6Ih0DXf8GkZr09+LTA9UguXvQl1eevgL5b4pv/GHrHDhmfw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rP5lKxLT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rP5lKxLT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B52F5C116C6; Fri, 9 Jan 2026 02:47:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767926846; bh=eR/mcmTUhW/HJ7Lb31/8v2Nu+WpkjxC3P5rB1CqxdTk=; h=From:To:Cc:Subject:Date:From; b=rP5lKxLTjg6Q0I7fEDWcCR1Fm2WZLycL+W7KJLRnK4Uq07gbccfEOIbDYyWQYyQtI XO0TG2Slsa2yIOrqimElLiETI5Xy7D8cU5elxIaQzDXRj+DyZsnQGPYTfQCfyeUZrW VHpVY5QQWDFyvYwgz/A58y9iM9WkbnHjMIaS/GEnLRMmhvw5YOHR2Mz8zyh/EqiUQ2 nY71BELPkJgKBEzHjKawz5xvIzcbWjn+PvvKvB6Gk4xYpcEiZSLuyqYkbiQ7HhrpEC KHVq4nAuHg0hloRGSxVUCxEKDaXGvb2jUab5X96nhFsng4cYcpCqrILWPLCeeglLll DORV70WbM4ozw== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH] f2fs: fix to prevent clearing immutable for large folio supported inode Date: Fri, 9 Jan 2026 10:47:16 +0800 Message-Id: <20260109024716.12047-1-chao@kernel.org> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Below testcase can change large folio supported inode from immutable to mutable, it's not as expected, let's add a new check condition in f2fs_setflags_common() to detect and reject it. - dd if=3D/dev/zero of=3D/mnt/f2fs/test bs=3D32k count=3D4 - f2fs_io setflags immutable /mnt/f2fs/test - echo 3 > /proc/sys/vm/drop_caches : to reload inode with large folio - f2fs_io read 32 0 1 mmap 0 0 /mnt/f2fs/test - f2fs_io clearflags immutable /mnt/f2fs/test Signed-off-by: Chao Yu --- fs/f2fs/file.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index ce291f152bc3..f7f9da0b215f 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2155,6 +2155,12 @@ static int f2fs_setflags_common(struct inode *inode,= u32 iflags, u32 mask) } } =20 + if ((iflags ^ masked_flags) & F2FS_IMMUTABLE_FL) { + if ((masked_flags & F2FS_IMMUTABLE_FL) && + mapping_large_folio_support(inode->i_mapping)) + return -EINVAL; + } + fi->i_flags =3D iflags | (fi->i_flags & ~mask); f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) && (fi->i_flags & F2FS_NOCOMP_FL)); --=20 2.40.1