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ecryptfs: use ZERO_PAGE instead of allocating zeroed memory in truncate_upper

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Use the existing pre-zeroed memory instead of allocating a new chunk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
This commit is contained in:
Christoph Hellwig
2026-04-08 08:06:38 +02:00
committed by Tyler Hicks
parent b109187378
commit b19fe74e0f
1 changed files with 2 additions and 9 deletions
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11
fs/ecryptfs/inode.c
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@@ -771,15 +771,8 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
*/
num_zeros = PAGE_SIZE - (ia->ia_size & ~PAGE_MASK);
if (num_zeros) {
char *zeros_virt;
zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
if (!zeros_virt) {
rc = -ENOMEM;
goto out;
}
rc = ecryptfs_write(inode, zeros_virt, ia->ia_size, num_zeros);
kfree(zeros_virt);
rc = ecryptfs_write(inode, page_address(ZERO_PAGE(0)),
ia->ia_size, num_zeros);
if (rc) {
pr_err("Error attempting to zero out the remainder of the end page on reducing truncate; rc = [%d]\n",
rc);