From cc12a6f25e07ed05d5825a1664b67a970842b2ca Mon Sep 17 00:00:00 2001 From: Ye Bin Date: Thu, 8 Dec 2022 10:32:31 +0800 Subject: ext4: allocate extended attribute value in vmalloc area 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 Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20221208023233.1231330-3-yebin@huaweicloud.com Signed-off-by: Theodore Ts'o Cc: stable@kernel.org --- fs/ext4/xattr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/ext4') diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 6bdd502527f8..b666d3bf8b38 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2548,7 +2548,7 @@ 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; @@ -2600,7 +2600,7 @@ 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) -- cgit v1.2.3