ARM: 8896/1: VDSO: Don't leak kernel addresses
authorGeert Uytterhoeven <geert@linux-m68k.org>
Wed, 31 Jul 2019 11:38:48 +0000 (12:38 +0100)
committerRussell King <rmk+kernel@armlinux.org.uk>
Fri, 23 Aug 2019 10:39:32 +0000 (11:39 +0100)
Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with
%p"), an obfuscated kernel pointer is printed at every boot if
debugging is enabled:

    vdso: 1 text pages at base (____ptrval____)

Remove the print completely, as it's useless without the address.

Based on commit 0f1bf7e39822476b ("arm64/vdso: don't leak kernel
addresses").

Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
arch/arm/kernel/vdso.c

index 8872acf..9bf16c9 100644 (file)
@@ -194,7 +194,6 @@ static int __init vdso_init(void)
        }
 
        text_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
-       pr_debug("vdso: %i text pages at base %p\n", text_pages, vdso_start);
 
        /* Allocate the VDSO text pagelist */
        vdso_text_pagelist = kcalloc(text_pages, sizeof(struct page *),