linux-kernel - [PATCH -next] module: use kmemdup rather than duplicating its implementation

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Date:	Wed, 13 Jul 2016 12:49:47 +0000
From:	weiyj_lk@....com
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next] module: use kmemdup rather than duplicating its implementation

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Use kmemdup rather than duplicating its implementation.

Generated by: scripts/coccinelle/api/memdup.cocci

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 kernel/module.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index beaebea..04de59f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1994,21 +1994,20 @@ static int copy_module_elf(struct module *mod, struct load_info *info)
 
 	/* Elf section header table */
 	size = sizeof(*info->sechdrs) * info->hdr->e_shnum;
-	mod->klp_info->sechdrs = kmalloc(size, GFP_KERNEL);
+	mod->klp_info->sechdrs = kmemdup(info->sechdrs, size, GFP_KERNEL);
 	if (mod->klp_info->sechdrs == NULL) {
 		ret = -ENOMEM;
 		goto free_info;
 	}
-	memcpy(mod->klp_info->sechdrs, info->sechdrs, size);
 
 	/* Elf section name string table */
 	size = info->sechdrs[info->hdr->e_shstrndx].sh_size;
-	mod->klp_info->secstrings = kmalloc(size, GFP_KERNEL);
+	mod->klp_info->secstrings = kmemdup(info->secstrings, size,
+					    GFP_KERNEL);
 	if (mod->klp_info->secstrings == NULL) {
 		ret = -ENOMEM;
 		goto free_sechdrs;
 	}
-	memcpy(mod->klp_info->secstrings, info->secstrings, size);
 
 	/* Elf symbol section index */
 	symndx = info->index.sym;