linux-kernel - [PATCH 4.4 20/65] x86/kaslr: Fix incorrect i8254 outb() parameters

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon,  4 Feb 2019 11:36:13 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Daniel Drake <drake@...lessm.com>,
        Thomas Gleixner <tglx@...utronix.de>, bp@...en8.de,
        hpa@...or.com, linux@...lessm.com
Subject: [PATCH 4.4 20/65] x86/kaslr: Fix incorrect i8254 outb() parameters

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Drake <drake@...lessm.com>

commit 7e6fc2f50a3197d0e82d1c0e86282976c9e6c8a4 upstream.

The outb() function takes parameters value and port, in that order.  Fix
the parameters used in the kalsr i8254 fallback code.

Fixes: 5bfce5ef55cb ("x86, kaslr: Provide randomness functions")
Signed-off-by: Daniel Drake <drake@...lessm.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: bp@...en8.de
Cc: hpa@...or.com
Cc: linux@...lessm.com
Cc: stable@...r.kernel.org
Link: https://lkml.kernel.org/r/20190107034024.15005-1-drake@endlessm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/boot/compressed/aslr.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/boot/compressed/aslr.c
+++ b/arch/x86/boot/compressed/aslr.c
@@ -25,8 +25,8 @@ static inline u16 i8254(void)
 	u16 status, timer;
 
 	do {
-		outb(I8254_PORT_CONTROL,
-		     I8254_CMD_READBACK | I8254_SELECT_COUNTER0);
+		outb(I8254_CMD_READBACK | I8254_SELECT_COUNTER0,
+		     I8254_PORT_CONTROL);
 		status = inb(I8254_PORT_COUNTER0);
 		timer  = inb(I8254_PORT_COUNTER0);
 		timer |= inb(I8254_PORT_COUNTER0) << 8;