Commit-ID:  071ac0c4e8e90d5de05f0779b03ae69ce84820d5
Gitweb:     http://git.kernel.org/tip/071ac0c4e8e90d5de05f0779b03ae69ce84820d5
Author:     Borislav Petkov <[email protected]>
AuthorDate: Mon, 30 Nov 2015 13:12:59 +0100
Committer:  Ingo Molnar <[email protected]>
CommitDate: Fri, 4 Dec 2015 12:55:01 +0100

x86/mm/ptdump: Make (debugfs)/kernel_page_tables read-only

File should be created with S_IRUSR and not with S_IWUSR too
because writing to it doesn't make any sense. I mean, we don't
have a ->write method anyway but let's have the permissions
correct too.

Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
 arch/x86/mm/debug_pagetables.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/debug_pagetables.c b/arch/x86/mm/debug_pagetables.c
index b35ee86..bfcffdf 100644
--- a/arch/x86/mm/debug_pagetables.c
+++ b/arch/x86/mm/debug_pagetables.c
@@ -26,7 +26,7 @@ static struct dentry *pe;
 
 static int __init pt_dump_debug_init(void)
 {
-       pe = debugfs_create_file("kernel_page_tables", 0600, NULL, NULL,
+       pe = debugfs_create_file("kernel_page_tables", S_IRUSR, NULL, NULL,
                                 &ptdump_fops);
        if (!pe)
                return -ENOMEM;
--
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