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initramfs: Use struct_size() helper to improve dir_add() 

Use struct_size() to calculate the number of bytes to allocate for a new
directory entry.  No functional changes.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Thorsten Blum 2025-09-12 08:52:57 +02:00 committed by Christian Brauner
parent 84f1766bdb
commit e60625e7ce
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 2 additions and 1 deletions
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3
init/initramfs.c
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@ -19,6 +19,7 @@
#include <linux/init_syscalls.h> #include <linux/init_syscalls.h>
#include <linux/umh.h> #include <linux/umh.h>
#include <linux/security.h> #include <linux/security.h>
#include <linux/overflow.h>
#include "do_mounts.h" #include "do_mounts.h"
#include "initramfs_internal.h" #include "initramfs_internal.h"
@ -152,7 +153,7 @@ static void __init dir_add(const char *name, size_t nlen, time64_t mtime)
{ {
struct dir_entry *de; struct dir_entry *de;
de = kmalloc(sizeof(struct dir_entry) + nlen, GFP_KERNEL); de = kmalloc(struct_size(de, name, nlen), GFP_KERNEL);
if (!de) if (!de)
panic_show_mem("can't allocate dir_entry buffer"); panic_show_mem("can't allocate dir_entry buffer");
INIT_LIST_HEAD(&de->list); INIT_LIST_HEAD(&de->list);