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Commit 2d1e8b3f authored by Wanpeng Li's avatar Wanpeng Li Committed by Linus Torvalds
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mm/hwpoison-inject.c: change permission of corrupt-pfn/unpoison-pfn to 0200 



Hwpoison injection doesn't implement read method for
corrupt-pfn/unpoison-pfn attributes:

# cat /sys/kernel/debug/hwpoison/corrupt-pfn
cat: /sys/kernel/debug/hwpoison/corrupt-pfn: Permission denied
# cat /sys/kernel/debug/hwpoison/unpoison-pfn
cat: /sys/kernel/debug/hwpoison/unpoison-pfn: Permission denied

This patch changes the permission of corrupt-pfn/unpoison-pfn to 0200.

Signed-off-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
Reviewed-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 29b4eede

mm/hwpoison-inject.c

+2 −2
Original line number Diff line number Diff line
@@ -88,12 +88,12 @@ static int pfn_inject_init(void) 
	 * hardware status change, hence do not require hardware support.

	 * They are mainly for testing hwpoison in software level.

	 */

	dentry = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir,

	dentry = debugfs_create_file("corrupt-pfn", 0200, hwpoison_dir,

					  NULL, &hwpoison_fops);

	if (!dentry)

		goto fail;



	dentry = debugfs_create_file("unpoison-pfn", 0600, hwpoison_dir,

	dentry = debugfs_create_file("unpoison-pfn", 0200, hwpoison_dir,

				     NULL, &unpoison_fops);

	if (!dentry)

		goto fail;