linux-kernel - [PATCH] kmemleak: change /sys/kernel/debug/kmemleak permissions from 0444 to 0644

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Message-ID: <150728996582.744328.11541332857988399411.stgit@buzz>
Date:   Fri, 06 Oct 2017 14:39:25 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>
Subject: [PATCH] kmemleak: change /sys/kernel/debug/kmemleak permissions
 from 0444 to 0644

Kmemleak could be tweaked in runtime by writing commands into debugfs file.
Root anyway can use it, but without write-bit this interface isn't obvious.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
---
 mm/kmemleak.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 7780cd83a495..fca3452e56c1 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -2104,7 +2104,7 @@ static int __init kmemleak_late_init(void)
 		return -ENOMEM;
 	}
 
-	dentry = debugfs_create_file("kmemleak", S_IRUGO, NULL, NULL,
+	dentry = debugfs_create_file("kmemleak", 0644, NULL, NULL,
 				     &kmemleak_fops);
 	if (!dentry)
 		pr_warn("Failed to create the debugfs kmemleak file\n");