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]
Message-Id: <7a2db17f2ffe902620554b9fde0349b4cf0dc051.1598363608.git.christophe.leroy@csgroup.eu>
Date:   Tue, 25 Aug 2020 13:54:01 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 3/9] powerpc/vdso: Remove NULL termination element in
 vdso_pagelist

No need of a NULL last element in pagelists, install_special_mapping()
knows how long the list is.

Remove that element.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/vdso.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 3bc4d5b1980b..daef14a284a3 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -752,7 +752,7 @@ static int __init vdso_init(void)
 
 #ifdef CONFIG_VDSO32
 	/* Make sure pages are in the correct state */
-	vdso32_pagelist = kcalloc(vdso32_pages + 2, sizeof(struct page *),
+	vdso32_pagelist = kcalloc(vdso32_pages + 1, sizeof(struct page *),
 				  GFP_KERNEL);
 	if (!vdso32_pagelist)
 		goto alloc_failed;
@@ -760,12 +760,11 @@ static int __init vdso_init(void)
 	for (i = 0; i < vdso32_pages; i++)
 		vdso32_pagelist[i] = virt_to_page(vdso32_kbase + i * PAGE_SIZE);
 
-	vdso32_pagelist[i++] = virt_to_page(vdso_data);
-	vdso32_pagelist[i] = NULL;
+	vdso32_pagelist[i] = virt_to_page(vdso_data);
 #endif
 
 #ifdef CONFIG_PPC64
-	vdso64_pagelist = kcalloc(vdso64_pages + 2, sizeof(struct page *),
+	vdso64_pagelist = kcalloc(vdso64_pages + 1, sizeof(struct page *),
 				  GFP_KERNEL);
 	if (!vdso64_pagelist)
 		goto alloc_failed;
@@ -773,8 +772,7 @@ static int __init vdso_init(void)
 	for (i = 0; i < vdso64_pages; i++)
 		vdso64_pagelist[i] = virt_to_page(vdso64_kbase + i * PAGE_SIZE);
 
-	vdso64_pagelist[i++] = virt_to_page(vdso_data);
-	vdso64_pagelist[i] = NULL;
+	vdso64_pagelist[i] = virt_to_page(vdso_data);
 #endif /* CONFIG_PPC64 */
 
 	smp_wmb();
-- 
2.25.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ