diff options
| author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-03-05 10:01:52 -0500 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-05 23:53:55 +0100 |
| commit | 681ff0181bbfb183e32bc6beb6ec076304470479 (patch) | |
| tree | d77d2bc75fb81caa0c73d00a341d700fe0cb37f5 /arch/x86/mm/init_32.c | |
| parent | 98d54f81e36ba3bf92172791eba5ca5bd813989b (diff) | |
x86/mm/init/32: Stop printing the virtual memory layout
For security reasons, 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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tycho Andersen <tycho@tycho.ws>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200305150152.831697-1-nivedita@alum.mit.edu
Diffstat (limited to 'arch/x86/mm/init_32.c')
| -rw-r--r-- | arch/x86/mm/init_32.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 23df4885bbed..8ae0272c1c51 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -788,44 +788,6 @@ void __init mem_init(void) x86_init.hyper.init_after_bootmem(); mem_init_print_info(NULL); - printk(KERN_INFO "virtual kernel memory layout:\n" - " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" - " cpu_entry : 0x%08lx - 0x%08lx (%4ld kB)\n" -#ifdef CONFIG_HIGHMEM - " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" -#endif - " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" - " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" - " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" - " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" - " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", - FIXADDR_START, FIXADDR_TOP, - (FIXADDR_TOP - FIXADDR_START) >> 10, - - CPU_ENTRY_AREA_BASE, - CPU_ENTRY_AREA_BASE + CPU_ENTRY_AREA_MAP_SIZE, - CPU_ENTRY_AREA_MAP_SIZE >> 10, - -#ifdef CONFIG_HIGHMEM - PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, - (LAST_PKMAP*PAGE_SIZE) >> 10, -#endif - - VMALLOC_START, VMALLOC_END, - (VMALLOC_END - VMALLOC_START) >> 20, - - (unsigned long)__va(0), (unsigned long)high_memory, - ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20, - - (unsigned long)&__init_begin, (unsigned long)&__init_end, - ((unsigned long)&__init_end - - (unsigned long)&__init_begin) >> 10, - - (unsigned long)&_etext, (unsigned long)&_edata, - ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, - - (unsigned long)&_text, (unsigned long)&_etext, - ((unsigned long)&_etext - (unsigned long)&_text) >> 10); /* * Check boundaries twice: Some fundamental inconsistencies can |