From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 8 Jun 2018 00:07:50 +0000 (-0700)
Subject: mm/vmpressure.c: use kstrndup instead of kmalloc+strncpy
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d62ff365b812ecd7415252568c1836811b3dde02;p=linux.git

mm/vmpressure.c: use kstrndup instead of kmalloc+strncpy

Using kstrndup() simplifies the code.

Link: http://lkml.kernel.org/r/20180503201807.24941-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 85350ce2d25d7..7142207224d3e 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -390,12 +390,11 @@ int vmpressure_register_event(struct mem_cgroup *memcg,
 	char *token;
 	int ret = 0;
 
-	spec_orig = spec = kzalloc(MAX_VMPRESSURE_ARGS_LEN + 1, GFP_KERNEL);
+	spec_orig = spec = kstrndup(args, MAX_VMPRESSURE_ARGS_LEN, GFP_KERNEL);
 	if (!spec) {
 		ret = -ENOMEM;
 		goto out;
 	}
-	strncpy(spec, args, MAX_VMPRESSURE_ARGS_LEN);
 
 	/* Find required level */
 	token = strsep(&spec, ",");