Commit 1babf557 authored Mar 05, 2020 by Arvind Sankar Committed by Michal Simek Mar 09, 2020

microblaze: Stop printing the virtual memory layout



For security, don't display the kernel's virtual memory layout.

Kees Cook points out:
"These have been entirely removed on other architectures, so let's
just do the same for ia32 and remove it unconditionally."

071929db ("arm64: Stop printing the virtual memory layout")
1c31d4e9 ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
31833332 ("m68k/mm: Stop printing the virtual memory layout")
fd8d0ca2 ("parisc: Hide virtual kernel memory layout")
adb1fe9a ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()")

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Acked-by: Tycho Andersen <tycho@tycho.ws>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

parent 519fa60b

arch/microblaze/mm/init.c

+0 −12

Original line number	Diff line number	Diff line
		@@ -201,18 +201,6 @@ void __init mem_init(void)
		#endif

		mem_init_print_info(NULL);
		#ifdef CONFIG_MMU
		pr_info("Kernel virtual memory layout:\n");
		pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP);
		#ifdef CONFIG_HIGHMEM
		pr_info(" * 0x%08lx..0x%08lx : highmem PTEs\n",
		PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP));
		#endif /* CONFIG_HIGHMEM */
		pr_info(" * 0x%08lx..0x%08lx : early ioremap\n",
		ioremap_bot, ioremap_base);
		pr_info(" * 0x%08lx..0x%08lx : vmalloc & ioremap\n",
		(unsigned long)VMALLOC_START, VMALLOC_END);
		#endif
		mem_init_done = 1;
		}

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