linux-kernel - [PATCH v3 32/36] sparc64: vdso2c: Drop sym_vvar

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: <20250917-vdso-sparc64-generic-2-v3-32-3679b1bc8ee8@linutronix.de>
Date: Wed, 17 Sep 2025 16:00:34 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
 Vincenzo Frascino <vincenzo.frascino@....com>, 
 Arnd Bergmann <arnd@...db.de>, "David S. Miller" <davem@...emloft.net>, 
 Andreas Larsson <andreas@...sler.com>, Nick Alcock <nick.alcock@...cle.com>, 
 John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>, 
 John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, 
 Shuah Khan <shuah@...nel.org>, Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Theodore Ts'o <tytso@....edu>, 
 "Jason A. Donenfeld" <Jason@...c4.com>, 
 Russell King <linux@...linux.org.uk>, 
 Madhavan Srinivasan <maddy@...ux.ibm.com>, 
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
 Christophe Leroy <christophe.leroy@...roup.eu>, 
 Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>, 
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
 Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, 
 Alexander Gordeev <agordeev@...ux.ibm.com>, 
 Christian Borntraeger <borntraeger@...ux.ibm.com>, 
 Sven Schnelle <svens@...ux.ibm.com>, 
 Nagarathnam Muthusamy <nagarathnam.muthusamy@...cle.com>, 
 Shannon Nelson <sln@...main.com>
Cc: linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev, 
 linux-mips@...r.kernel.org, linux-s390@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v3 32/36] sparc64: vdso2c: Drop sym_vvar_start handling

After the adoption of the generic vDSO library this symbol does not exist.

The alignment invariant is now guaranteed by the generic code.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 arch/sparc/include/asm/vdso.h | 2 --
 arch/sparc/vdso/vdso2c.c      | 6 ------
 arch/sparc/vdso/vdso2c.h      | 4 ----
 3 files changed, 12 deletions(-)

diff --git a/arch/sparc/include/asm/vdso.h b/arch/sparc/include/asm/vdso.h
index 59e79d35cd7384e2dd752e92d20bc599e38cb8b0..f08562d10215bd3e9a2d4eaa0aadc8400b40e256 100644
--- a/arch/sparc/include/asm/vdso.h
+++ b/arch/sparc/include/asm/vdso.h
@@ -8,8 +8,6 @@
 struct vdso_image {
 	void *data;
 	unsigned long size;   /* Always a multiple of PAGE_SIZE */
-
-	long sym_vvar_start;  /* Negative offset to the vvar area */
 };

 #ifdef CONFIG_SPARC64
diff --git a/arch/sparc/vdso/vdso2c.c b/arch/sparc/vdso/vdso2c.c
index b97af5ec9f35c01f2a976b6213b1768b677ad231..70b14a436fe2297ab446f778ab0d43155c272421 100644
--- a/arch/sparc/vdso/vdso2c.c
+++ b/arch/sparc/vdso/vdso2c.c
@@ -58,18 +58,12 @@

 const char *outfilename;

-/* Symbols that we need in vdso2c. */
-enum {
-	sym_vvar_start,
-};
-
 struct vdso_sym {
 	const char *name;
 	int export;
 };

 struct vdso_sym required_syms[] = {
-	[sym_vvar_start] = {"vvar_start", 1},
 };

 __attribute__((format(printf, 1, 2))) __attribute__((noreturn))
diff --git a/arch/sparc/vdso/vdso2c.h b/arch/sparc/vdso/vdso2c.h
index 60d69acc748f2401156a730027fe34abfb9fb6bc..ba0794659eb5af53b8c86b24f3221a5d0b3f74ab 100644
--- a/arch/sparc/vdso/vdso2c.h
+++ b/arch/sparc/vdso/vdso2c.h
@@ -104,10 +104,6 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 		}
 	}

-	/* Validate mapping addresses. */
-	if (syms[sym_vvar_start] % 8192)
-		fail("vvar_begin must be a multiple of 8192\n");
-
 	if (!name) {
 		fwrite(stripped_addr, stripped_len, 1, outfile);
 		return;

-- 
2.51.0