From mboxrd@z Thu Jan 1 00:00:00 1970 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 4F0A71C1ADB; Mon, 22 Sep 2025 19:39:11 +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=1758569951; cv=none; b=GNq6v/fr0ZLlZIsq3ka1V6dii6sF3ABu8UDicePLhVrSbfy4WTd+leyIBjJrtLtRHTD1/sDg2uNsNWG6DTukI8GlYn0da5WH8hc3fnxPfa2zFtDLLK67zn8AWzgGPyBVNb6OsS61EB7VnnGk0zHbthsPietddgJhu98Ka1Qj7OI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758569951; c=relaxed/simple; bh=vdRhyoF+f67Dkylm054p+MoX0HFbuWdQ525p0FfEWPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hMjYHzQSheZvqesDrwSpd8k1gNbS52jN0fTJf6wv2Jf4IeGPNNCt3tun3Rj/ajqDeIuzF1xv8kmGEC0bY8GGpdbs0869BJgrD2WevCTn+BMOl6w6Tj0LLRjs6yRo2dELUmeho/DVhIaTY7mFysP30wBFUGsK739c9+XcmRIF2OE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QTm//THJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QTm//THJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DCE6DC4CEF0; Mon, 22 Sep 2025 19:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758569951; bh=vdRhyoF+f67Dkylm054p+MoX0HFbuWdQ525p0FfEWPo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QTm//THJ2zy0wC6ruGhdLiByCRCv3CMx8T+wpvy4SHO8EX5CzL6rGLGirnW9GVJ6r 8AFLh15HzWxUNyDPy9K65TbATMoo2i3ffZDkvCJMQ/YyD4TEu/GTiVDGVN56xB13ia xNTpJKB8rWNuYNYla9Jg9sEs0vh8KE5GbWpuTXOI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johannes Thumshirn , Filipe Manana , Qu Wenruo , David Sterba Subject: [PATCH 6.12 053/105] btrfs: tree-checker: fix the incorrect inode ref size check Date: Mon, 22 Sep 2025 21:29:36 +0200 Message-ID: <20250922192410.303744774@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250922192408.913556629@linuxfoundation.org> References: <20250922192408.913556629@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qu Wenruo commit 96fa515e70f3e4b98685ef8cac9d737fc62f10e1 upstream. [BUG] Inside check_inode_ref(), we need to make sure every structure, including the btrfs_inode_extref header, is covered by the item. But our code is incorrectly using "sizeof(iref)", where @iref is just a pointer. This means "sizeof(iref)" will always be "sizeof(void *)", which is much smaller than "sizeof(struct btrfs_inode_extref)". This will allow some bad inode extrefs to sneak in, defeating tree-checker. [FIX] Fix the typo by calling "sizeof(*iref)", which is the same as "sizeof(struct btrfs_inode_extref)", and will be the correct behavior we want. Fixes: 71bf92a9b877 ("btrfs: tree-checker: Add check for INODE_REF") CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Johannes Thumshirn Reviewed-by: Filipe Manana Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/tree-checker.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -1744,10 +1744,10 @@ static int check_inode_ref(struct extent while (ptr < end) { u16 namelen; - if (unlikely(ptr + sizeof(iref) > end)) { + if (unlikely(ptr + sizeof(*iref) > end)) { inode_ref_err(leaf, slot, "inode ref overflow, ptr %lu end %lu inode_ref_size %zu", - ptr, end, sizeof(iref)); + ptr, end, sizeof(*iref)); return -EUCLEAN; }