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ovl: Replace offsetof() with struct_size() in ovl_cache_entry_new()

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Compared to offsetof(), struct_size() provides additional compile-time
checks for structs with flexible arrays (e.g., __must_be_array()).

No functional changes intended.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Thorsten Blum 2025-05-03 13:52:03 +02:00 committed by Miklos Szeredi
parent 8a39f1c870
commit 5aaf6a8cc3
1 changed files with 2 additions and 2 deletions
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4
fs/overlayfs/readdir.c
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@ -13,6 +13,7 @@
#include <linux/security.h>
#include <linux/cred.h>
#include <linux/ratelimit.h>
#include <linux/overflow.h>
#include "overlayfs.h"
struct ovl_cache_entry {
@ -147,9 +148,8 @@ static struct ovl_cache_entry *ovl_cache_entry_new(struct ovl_readdir_data *rdd,
u64 ino, unsigned int d_type)
{
struct ovl_cache_entry *p;
size_t size = offsetof(struct ovl_cache_entry, name[len + 1]);
p = kmalloc(size, GFP_KERNEL);
p = kmalloc(struct_size(p, name, len + 1), GFP_KERNEL);
if (!p)
return NULL;