From 09e5cc649d39f80e913043099b465374ceef4faf Mon Sep 17 00:00:00 2001 From: Ye Bin Date: Thu, 8 Dec 2022 10:32:31 +0800 Subject: [PATCH] UPSTREAM: ext4: allocate extended attribute value in vmalloc area 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 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 Signed-off-by: Greg Kroah-Hartman Bug: 262267471 Change-Id: I92a4a66d8220f46f26a89100ba41c659559443a7 Signed-off-by: Tudor Ambarus --- fs/ext4/xattr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 38531c5e16c6..02fc067474f6 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2556,7 +2556,7 @@ 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; @@ -2608,7 +2608,7 @@ 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)