This is a note to let you know that I've just added the patch titled
ext4: allocate extended attribute value in vmalloc area
to the 4.19-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-allocate-extended-attribute-value-in-vmalloc-area.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cc12a6f25e07ed05d5825a1664b67a970842b2ca Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@xxxxxxxxxx>
Date: Thu, 8 Dec 2022 10:32:31 +0800
Subject: ext4: allocate extended attribute value in vmalloc area
From: Ye Bin <yebin10@xxxxxxxxxx>
commit cc12a6f25e07ed05d5825a1664b67a970842b2ca upstream.
Now, extended attribute value maximum length is 64K. The memory
requested here does not need continuous physical addresses, so it is
appropriate to use kvmalloc to request memory. At the same time, it
can also cope with the situation that the extended attribute will
become longer in the future.
Signed-off-by: Ye Bin <yebin10@xxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Link: https://lore.kernel.org/r/20221208023233.1231330-3-yebin@xxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Cc: stable@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/xattr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -2570,7 +2570,7 @@ static int ext4_xattr_move_to_block(hand
is = kzalloc(sizeof(struct ext4_xattr_ibody_find), GFP_NOFS);
bs = kzalloc(sizeof(struct ext4_xattr_block_find), GFP_NOFS);
- buffer = kmalloc(value_size, GFP_NOFS);
+ buffer = kvmalloc(value_size, GFP_NOFS);
b_entry_name = kmalloc(entry->e_name_len + 1, GFP_NOFS);
if (!is || !bs || !buffer || !b_entry_name) {
error = -ENOMEM;
@@ -2622,7 +2622,7 @@ static int ext4_xattr_move_to_block(hand
error = 0;
out:
kfree(b_entry_name);
- kfree(buffer);
+ kvfree(buffer);
if (is)
brelse(is->iloc.bh);
if (bs)
Patches currently in stable-queue which might be from yebin10@xxxxxxxxxx are
queue-4.19/ext4-fix-inode-leak-in-ext4_xattr_inode_create-on-an-error-path.patch
queue-4.19/blk-mq-fix-possible-memleak-when-register-hctx-faile.patch
queue-4.19/ext4-allocate-extended-attribute-value-in-vmalloc-area.patch
queue-4.19/ext4-init-quota-for-old.inode-in-ext4_rename.patch
