linux-kernel - [PATCH 2.6.19-rc2-mm1] Fix fake return address

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Tue, 17 Oct 2006 19:21:38 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <ak@....de>, Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 2.6.19-rc2-mm1] Fix fake return address

The fake return address was being set to __KERNEL_PDA, rather than 0.
Push it earlier while %eax still equals 0.

Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
Cc: Andi Kleen <ak@....de>
Cc: Andrew Morton <akpm@...l.org>

diff -r b8e58159855c arch/i386/kernel/head.S
--- a/arch/i386/kernel/head.S	Tue Oct 17 19:04:59 2006 -0700
+++ b/arch/i386/kernel/head.S	Tue Oct 17 19:05:46 2006 -0700
@@ -316,12 +316,12 @@ 1:	movl $(__KERNEL_DS),%eax	# reload all
 	xorl %eax,%eax			# Clear FS and LDT
 	movl %eax,%fs
 	lldt %ax
+	pushl %eax		# fake return address
 
 	movl $(__KERNEL_PDA),%eax
 	mov  %eax,%gs
 
 	cld			# gcc2 wants the direction flag cleared at all times
-	pushl %eax		# fake return address
 #ifdef CONFIG_SMP
 	movb ready, %cl
 	movb $1, ready



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/