linux-kernel - [PATCH AUTOSEL 5.15 29/68] parisc: Convert PTE lookup to use extru

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

Date:   Tue, 30 Nov 2021 09:46:25 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Helge Deller <deller@....de>, Sasha Levin <sashal@...nel.org>,
        James.Bottomley@...senPartnership.com, svens@...ckframe.org,
        dave.anglin@...l.net, linux-parisc@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 29/68] parisc: Convert PTE lookup to use extru_safe() macro

From: Helge Deller <deller@....de>

[ Upstream commit 3fbdc121bd051d9f1b3b2e232ad734c44b47d32c ]

Convert the PTE lookup functions to use the safer extru_safe macro.

Signed-off-by: Helge Deller <deller@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/parisc/kernel/entry.S | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 437c8d31f3907..625c19884905b 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -393,17 +393,9 @@
 	 */
 	.macro		L2_ptep	pmd,pte,index,va,fault
 #if CONFIG_PGTABLE_LEVELS == 3
-	extru		\va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
+	extru_safe	\va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
 #else
-# if defined(CONFIG_64BIT)
-	extrd,u		\va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
-  #else
-  # if PAGE_SIZE > 4096
-	extru		\va,31-ASM_PGDIR_SHIFT,32-ASM_PGDIR_SHIFT,\index
-  # else
-	extru		\va,31-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
-  # endif
-# endif
+	extru_safe	\va,31-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
 #endif
 	dep             %r0,31,PAGE_SHIFT,\pmd  /* clear offset */
 #if CONFIG_PGTABLE_LEVELS < 3
@@ -413,7 +405,7 @@
 	bb,>=,n		\pmd,_PxD_PRESENT_BIT,\fault
 	dep		%r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */
 	SHLREG		\pmd,PxD_VALUE_SHIFT,\pmd
-	extru		\va,31-PAGE_SHIFT,ASM_BITS_PER_PTE,\index
+	extru_safe	\va,31-PAGE_SHIFT,ASM_BITS_PER_PTE,\index
 	dep		%r0,31,PAGE_SHIFT,\pmd  /* clear offset */
 	shladd		\index,BITS_PER_PTE_ENTRY,\pmd,\pmd /* pmd is now pte */
 	.endm
-- 
2.33.0