linux-kernel - [PATCH] proc: fold kmalloc() + strcpy() into kmemdup()

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Message-ID: <90af27c1-0b86-47a6-a6c8-61a58b8aa747@p183>
Date: Sun, 8 Sep 2024 12:27:45 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH] proc: fold kmalloc() + strcpy() into kmemdup()

strcpy() will recalculate string length second time which is
unnecessary in this case.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/generic.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -464,9 +464,9 @@ struct proc_dir_entry *proc_symlink(const char *name,
 			  (S_IFLNK | S_IRUGO | S_IWUGO | S_IXUGO),1);
 
 	if (ent) {
-		ent->data = kmalloc((ent->size=strlen(dest))+1, GFP_KERNEL);
+		ent->size = strlen(dest);
+		ent->data = kmemdup(dest, ent->size + 1, GFP_KERNEL);
 		if (ent->data) {
-			strcpy((char*)ent->data,dest);
 			ent->proc_iops = &proc_link_inode_operations;
 			ent = proc_register(parent, ent);
 		} else {