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From: "tip-bot2 for Arvind Sankar" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Arvind Sankar <nivedita@alum.mit.edu>,
	Borislav Petkov <bp@suse.de>, Kees Cook <keescook@chromium.org>,
	Dave Hansen <dave.hansen@intel.com>, x86 <x86@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/cleanups] x86/mm: Stop printing BRK addresses
Date: Sat, 23 May 2020 07:41:28 -0000	[thread overview]
Message-ID: <159021968859.17951.9516200260774594729.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200229231120.1147527-1-nivedita@alum.mit.edu>

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID:     67d631b7c05eff955ccff4139327f0f92a5117e5
Gitweb:        https://git.kernel.org/tip/67d631b7c05eff955ccff4139327f0f92a5117e5
Author:        Arvind Sankar <nivedita@alum.mit.edu>
AuthorDate:    Sat, 29 Feb 2020 18:11:20 -05:00
Committer:     Borislav Petkov <bp@suse.de>
CommitterDate: Sat, 23 May 2020 09:34:18 +02:00

x86/mm: Stop printing BRK addresses

This currently leaks kernel physical addresses into userspace.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Link: https://lkml.kernel.org/r/20200229231120.1147527-1-nivedita@alum.mit.edu
---
 arch/x86/mm/init.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 1bba16c..a573a3e 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -121,8 +121,6 @@ __ref void *alloc_low_pages(unsigned int num)
 	} else {
 		pfn = pgt_buf_end;
 		pgt_buf_end += num;
-		printk(KERN_DEBUG "BRK [%#010lx, %#010lx] PGTABLE\n",
-			pfn << PAGE_SHIFT, (pgt_buf_end << PAGE_SHIFT) - 1);
 	}
 
 	for (i = 0; i < num; i++) {

      parent reply	other threads:[~2020-05-23  7:41 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-29 23:11 [PATCH] x86/mm/init: Stop printing pgt_buf addresses Arvind Sankar
2020-02-29 23:23 ` Kees Cook
2020-04-09 22:19 ` Arvind Sankar
2020-04-09 22:35   ` Dave Hansen
2020-05-23  1:51 ` Arvind Sankar
2020-05-23  2:57   ` Joe Perches
2020-05-23  7:41 ` tip-bot2 for Arvind Sankar [this message]

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