This is a note to let you know that I've just added the patch titled
ext4: correct the start block of counting reserved clusters
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext4-correct-the-start-block-of-counting-reserved-clusters.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 40ea98396a3659062267d1fe5f99af4f7e4f05e3 Mon Sep 17 00:00:00 2001
From: Zhang Yi <yi.zhang@xxxxxxxxxx>
Date: Thu, 24 Aug 2023 17:26:04 +0800
Subject: ext4: correct the start block of counting reserved clusters
From: Zhang Yi <yi.zhang@xxxxxxxxxx>
commit 40ea98396a3659062267d1fe5f99af4f7e4f05e3 upstream.
When big allocate feature is enabled, we need to count and update
reserved clusters before removing a delayed only extent_status entry.
{init|count|get}_rsvd() have already done this, but the start block
number of this counting isn't correct in the following case.
lblk end
| |
v v
-------------------------
| | orig_es
-------------------------
^ ^
len1 is 0 | len2 |
If the start block of the orig_es entry founded is bigger than lblk, we
passed lblk as start block to count_rsvd(), but the length is correct,
finally, the range to be counted is offset. This patch fix this by
passing the start blocks to 'orig_es->lblk + len1'.
Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
Cc: stable@xxxxxxxxxx
Link: https://lore.kernel.org/r/20230824092619.1327976-2-yi.zhang@xxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/extents_status.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -1348,8 +1348,8 @@ retry:
}
}
if (count_reserved)
- count_rsvd(inode, lblk, orig_es.es_len - len1 - len2,
- &orig_es, &rc);
+ count_rsvd(inode, orig_es.es_lblk + len1,
+ orig_es.es_len - len1 - len2, &orig_es, &rc);
goto out_get_reserved;
}
Patches currently in stable-queue which might be from yi.zhang@xxxxxxxxxx are
queue-5.4/jbd2-fix-potential-data-lost-in-recovering-journal-raced-with-synchronizing-fs-bdev.patch
queue-5.4/ext4-correct-the-start-block-of-counting-reserved-clusters.patch
