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UPSTREAM: ext4: allocate extended attribute value in vmalloc area

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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@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221208023233.1231330-3-yebin@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bug: 262267471
Change-Id: I92a4a66d8220f46f26a89100ba41c659559443a7
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
This commit is contained in:
Ye Bin 2022-12-08 10:32:31 +08:00 committed by Treehugger Robot
parent 7cfbc7501b
commit 7431096bfd
1 changed files with 2 additions and 2 deletions
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4
fs/ext4/xattr.c
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@ -2571,7 +2571,7 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode,
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;
@ -2623,7 +2623,7 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode,
error = 0;
out:
kfree(b_entry_name);
kfree(buffer);
kvfree(buffer);
if (is)
brelse(is->iloc.bh);
if (bs)