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authorHelge Deller <deller@gmx.de>2018-01-12 22:57:15 +0100
committerHelge Deller <deller@gmx.de>2018-03-02 10:04:35 +0100
commitfd8d0ca2563151204f3fe555dc8ca4bcfe8677a3 (patch)
tree7a0d974c8991b8813a604d9e70145194329f080f /arch/parisc/mm
parentparisc: Fix ordering of cache and TLB flushes (diff)
downloadlinux-dev-fd8d0ca2563151204f3fe555dc8ca4bcfe8677a3.tar.xz
linux-dev-fd8d0ca2563151204f3fe555dc8ca4bcfe8677a3.zip
parisc: Hide virtual kernel memory layout
For security reasons do not expose the virtual kernel memory layout to userspace. Signed-off-by: Helge Deller <deller@gmx.de> Suggested-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org # 4.15 Reviewed-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to '')
-rw-r--r--arch/parisc/mm/init.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 48f41399fc0b..cab32ee824d2 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -629,7 +629,12 @@ void __init mem_init(void)
#endif
mem_init_print_info(NULL);
-#ifdef CONFIG_DEBUG_KERNEL /* double-sanity-check paranoia */
+
+#if 0
+ /*
+ * Do not expose the virtual kernel memory layout to userspace.
+ * But keep code for debugging purposes.
+ */
printk("virtual kernel memory layout:\n"
" vmalloc : 0x%px - 0x%px (%4ld MB)\n"
" memory : 0x%px - 0x%px (%4ld MB)\n"