x86/mm: Don't leak kernel addresses
authorMatteo Croce <mcroce@redhat.com>
Mon, 18 Mar 2019 21:24:03 +0000 (22:24 +0100)
committerIngo Molnar <mingo@kernel.org>
Tue, 19 Mar 2019 11:10:56 +0000 (12:10 +0100)
Since commit:

  ad67b74d2469d9b8 ("printk: hash addresses printed with %p")

at boot "____ptrval____" is printed instead of actual addresses:

    found SMP MP-table at [mem 0x000f5cc0-0x000f5ccf] mapped at [(____ptrval____)]

Instead of changing the print to "%px", and leaking a kernel addresses,
just remove the print completely, like in:

  071929dbdd865f77 ("arm64: Stop printing the virtual memory layout").

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/mpparse.c

index 3482460..1bfe5c6 100644 (file)
@@ -598,8 +598,8 @@ static int __init smp_scan_config(unsigned long base, unsigned long length)
                        mpf_base = base;
                        mpf_found = true;
 
-                       pr_info("found SMP MP-table at [mem %#010lx-%#010lx] mapped at [%p]\n",
-                               base, base + sizeof(*mpf) - 1, mpf);
+                       pr_info("found SMP MP-table at [mem %#010lx-%#010lx]\n",
+                               base, base + sizeof(*mpf) - 1);
 
                        memblock_reserve(base, sizeof(*mpf));
                        if (mpf->physptr)