linux-kernel - [PATCH] powerpc/32s: fix initial setup of segment registers on secondary CPU

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

Date:   Tue, 11 Jun 2019 15:47:20 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, erhard_f@...lbox.org
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/32s: fix initial setup of segment registers on
 secondary CPU

The patch referenced below moved the loading of segment registers
out of load_up_mmu() in order to do it earlier in the boot sequence.
However, the secondary CPU still needs it to be done when loading up
the MMU.

Reported-by: Erhard F. <erhard_f@...lbox.org>
Fixes: 215b823707ce ("powerpc/32s: set up an early static hash table for KASAN")
Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/kernel/head_32.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 1d5f1bd0dacd..f255e22184b4 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -752,6 +752,7 @@ __secondary_start:
 	stw	r0,0(r3)
 
 	/* load up the MMU */
+	bl	load_segment_registers
 	bl	load_up_mmu
 
 	/* ptr to phys current thread */
-- 
2.13.3