[PATCH] microblaze: Stop printing the virtual memory layout

Arvind Sankar
2020-03-05T15:05:08Z

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."

071929dbdd86 ("arm64: Stop printing the virtual memory layout")
1c31d4e96b8c ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
31833332f798 ("m68k/mm: Stop printing the virtual memory layout")
fd8d0ca25631 ("parisc: Hide virtual kernel memory layout")
adb1fe9ae2ee ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()")

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
---
arch/microblaze/mm/init.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 1056f1674065..8323651bf7ec 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -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;
}

--
2.24.1