From nobody Thu Feb 12 00:44:50 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3494CC77B6E for ; Wed, 12 Apr 2023 09:27:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231486AbjDLJ1d (ORCPT ); Wed, 12 Apr 2023 05:27:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230123AbjDLJ0Q (ORCPT ); Wed, 12 Apr 2023 05:26:16 -0400 Received: from dggsgout12.his.huawei.com (unknown [45.249.212.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D52157EE1; Wed, 12 Apr 2023 02:26:13 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4PxHQ80vF6z4f435t; Wed, 12 Apr 2023 17:26:08 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP4 (Coremail) with SMTP id gCh0CgDHL7MpeTZkL5_1HA--.3769S10; Wed, 12 Apr 2023 17:26:09 +0800 (CST) From: Kemeng Shi To: tytso@mit.edu, adilger.kernel@dilger.ca, ojaswin@linux.ibm.com Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, shikemeng@huaweicloud.com Subject: [PATCH v2 08/19] ext4: get block from bh before pass it to ext4_free_blocks_simple in ext4_free_blocks Date: Thu, 13 Apr 2023 01:28:22 +0800 Message-Id: <20230412172833.2317696-9-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20230412172833.2317696-1-shikemeng@huaweicloud.com> References: <20230412172833.2317696-1-shikemeng@huaweicloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgDHL7MpeTZkL5_1HA--.3769S10 X-Coremail-Antispam: 1UD129KBjvJXoW7JF48Cr4UZw1DJw1xJFy8Grg_yoW8Jr17pw srAFyrGr1kWwn2gF4fJw15JwsI9w48G3WUWFWfWw18Xry7X34Sy3WqyF15WF1UtrZav3ZF qFn0grW5Cw4UuaDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPF14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2jI8I6cxK62vIxIIY0VWUZVW8XwA2048vs2IY02 0E87I2jVAFwI0_JF0E3s1l82xGYIkIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0 rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6x IIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xv wVC2z280aVCY1x0267AKxVW0oVCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFc xC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_ Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2 IErcIFxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJV W8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjTRKfOw UUUUU X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" ext4_free_blocks will retrieve block from bh if block parameter is zero. Retrieve block before ext4_free_blocks_simple to avoid potentially passing wrong block to ext4_free_blocks_simple. Signed-off-by: Kemeng Shi --- fs/ext4/mballoc.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index b9a7b669b97d..ca11d0aa8a59 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6117,12 +6117,6 @@ void ext4_free_blocks(handle_t *handle, struct inode= *inode, =20 sbi =3D EXT4_SB(sb); =20 - if (sbi->s_mount_state & EXT4_FC_REPLAY) { - ext4_free_blocks_simple(inode, block, count); - return; - } - - might_sleep(); if (bh) { if (block) BUG_ON(block !=3D bh->b_blocknr); @@ -6130,6 +6124,13 @@ void ext4_free_blocks(handle_t *handle, struct inode= *inode, block =3D bh->b_blocknr; } =20 + if (sbi->s_mount_state & EXT4_FC_REPLAY) { + ext4_free_blocks_simple(inode, block, count); + return; + } + + might_sleep(); + if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) && !ext4_inode_block_valid(inode, block, count)) { ext4_error(sb, "Freeing blocks not in datazone - " --=20 2.30.0