linux-ext4 - [PATCH v3 0/8] ext4: fix divide error in mb_update_avg_fragment

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Message-ID: <20240104142040.2835097-1-libaokun1@huawei.com>
Date: Thu, 4 Jan 2024 22:20:32 +0800
From: Baokun Li <libaokun1@...wei.com>
To: <linux-ext4@...r.kernel.org>
CC: <tytso@....edu>, <adilger.kernel@...ger.ca>, <jack@...e.cz>,
	<ritesh.list@...il.com>, <linux-kernel@...r.kernel.org>,
	<yi.zhang@...wei.com>, <yangerkun@...wei.com>, <yukuai3@...wei.com>,
	<libaokun1@...wei.com>
Subject: [PATCH v3 0/8] ext4: fix divide error in mb_update_avg_fragment_size()

V2->V3:
  Replace patch 3's changelog with the one suggested by Jan Kara.
  Refactor the code in patch 4 to make it more readable, as suggested by Jan Kara.
  Patch 8 is adapted based on patch 4 after modification.
  Add Reviewed-by tag.

V1->V2:
  Fixed some things pointed out by Jan Kara.
  Fixed more cases where blocks could be allocated from corrupted groups.

[V1]: https://lore.kernel.org/all/20231218141814.1477338-1-libaokun1@huawei.com/
[V2]: https://lore.kernel.org/all/20231221150558.2740823-1-libaokun1@huawei.com/

Baokun Li (8):
  ext4: fix double-free of blocks due to wrong extents moved_len
  ext4: do not trim the group with corrupted block bitmap
  ext4: regenerate buddy after block freeing failed if under fc replay
  ext4: avoid bb_free and bb_fragments inconsistency in mb_free_blocks()
  ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block
    bitmap corrupt
  ext4: avoid allocating blocks from corrupted group in
    ext4_mb_try_best_found()
  ext4: avoid allocating blocks from corrupted group in
    ext4_mb_find_by_goal()
  ext4: mark the group block bitmap as corrupted before reporting an
    error

 fs/ext4/mballoc.c     | 91 ++++++++++++++++++++++++++++---------------
 fs/ext4/move_extent.c |  6 +--
 2 files changed, 62 insertions(+), 35 deletions(-)

-- 
2.31.1