linux-kernel - [PATCH] unicore32: Stop printing the virtual memory layout

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 28 Aug 2018 16:23:13 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Guan Xuetao <gxt@....edu.cn>
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] unicore32: Stop printing the virtual memory layout

Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with
%p"), the virtual memory layout printed during boot up contains "ptrval"
instead of actual addresses.

Instead of changing the printing to "%px", and leaking virtual memory
layout information again, just remove the printing completely, cfr. e.g.
commits 071929dbdd865f77 ("arm64: Stop printing the virtual memory
layout") and  31833332f7987636 ("m68k/mm: Stop printing the virtual
memory layout").

All interesting information (actual section sizes) is already printed by
mem_init_print_info() just above anyway.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 arch/unicore32/mm/init.c | 24 ------------------------
 1 file changed, 24 deletions(-)

diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c
index f4950fbfe57493c7..1662058c272a5917 100644
--- a/arch/unicore32/mm/init.c
+++ b/arch/unicore32/mm/init.c
@@ -344,30 +344,6 @@ void __init mem_init(void)
 	free_all_bootmem();
 
 	mem_init_print_info(NULL);
-	printk(KERN_NOTICE "Virtual kernel memory layout:\n"
-		"    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-		"      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"
-		"      .text : 0x%p" " - 0x%p" "   (%4d kB)\n"
-		"      .data : 0x%p" " - 0x%p" "   (%4d kB)\n",
-
-		VECTORS_BASE, VECTORS_BASE + PAGE_SIZE,
-		DIV_ROUND_UP(PAGE_SIZE, SZ_1K),
-		VMALLOC_START, VMALLOC_END,
-		DIV_ROUND_UP((VMALLOC_END - VMALLOC_START), SZ_1M),
-		PAGE_OFFSET, (unsigned long)high_memory,
-		DIV_ROUND_UP(((unsigned long)high_memory - PAGE_OFFSET), SZ_1M),
-		MODULES_VADDR, MODULES_END,
-		DIV_ROUND_UP((MODULES_END - MODULES_VADDR), SZ_1M),
-
-		__init_begin, __init_end,
-		DIV_ROUND_UP((__init_end - __init_begin), SZ_1K),
-		_stext, _etext,
-		DIV_ROUND_UP((_etext - _stext), SZ_1K),
-		_sdata, _edata,
-		DIV_ROUND_UP((_edata - _sdata), SZ_1K));
 
 	BUILD_BUG_ON(TASK_SIZE				> MODULES_VADDR);
 	BUG_ON(TASK_SIZE				> MODULES_VADDR);
-- 
2.17.1