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 DCAD211C88 for ; Mon, 12 Jun 2023 10:51:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 628F0C433EF; Mon, 12 Jun 2023 10:51:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686567116; bh=/rniT1SWEytU1MAYbooJOG0o57UZrnLB+nDxK3g6qhE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nM8B7gkxk/BZnZ/LHAgapTh+NXqzO25dhZxpF7HdEoI8yO/4h30I9nrXq23NJXI39 f3auL7juRwFOXJ0TSvegtfTbt4x7hjGA9OIgVotiI/yZzgEG1IGWGPyWRysekvoA2R bUIaKnPGYAUxfKvBF9jbVU5LfxyOCQDdUtDAEdew= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Theodore Tso Subject: [PATCH 6.3 157/160] ext4: only check dquot_initialize_needed() when debugging Date: Mon, 12 Jun 2023 12:28:09 +0200 Message-ID: <20230612101722.261859456@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230612101715.129581706@linuxfoundation.org> References: <20230612101715.129581706@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Theodore Ts'o commit dea9d8f7643fab07bf89a1155f1f94f37d096a5e upstream. ext4_xattr_block_set() relies on its caller to call dquot_initialize() on the inode. To assure that this has happened there are WARN_ON checks. Unfortunately, this is subject to false positives if there is an antagonist thread which is flipping the file system at high rates between r/o and rw. So only do the check if EXT4_XATTR_DEBUG is enabled. Link: https://lore.kernel.org/r/20230608044056.GA1418535@mit.edu Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/xattr.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2057,8 +2057,9 @@ inserted: else { u32 ref; +#ifdef EXT4_XATTR_DEBUG WARN_ON_ONCE(dquot_initialize_needed(inode)); - +#endif /* The old block is released after updating the inode. */ error = dquot_alloc_block(inode, @@ -2121,8 +2122,9 @@ inserted: /* We need to allocate a new block */ ext4_fsblk_t goal, block; +#ifdef EXT4_XATTR_DEBUG WARN_ON_ONCE(dquot_initialize_needed(inode)); - +#endif goal = ext4_group_first_block_no(sb, EXT4_I(inode)->i_block_group); block = ext4_new_meta_blocks(handle, inode, goal, 0,