linux-kernel - [PATCH v2 10/19] sparc/vdso: Remove vdso pointer from mm->context

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: <20201124002932.1220517-11-dima@arista.com>
Date:   Tue, 24 Nov 2020 00:29:23 +0000
From:   Dmitry Safonov <dima@...sta.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dmitry Safonov <0x7f454c46@...il.com>,
        Dmitry Safonov <dima@...sta.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Guo Ren <guoren@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Will Deacon <will@...nel.org>, x86@...nel.org,
        "David S. Miller" <davem@...emloft.net>, sparclinux@...r.kernel.org
Subject: [PATCH v2 10/19] sparc/vdso: Remove vdso pointer from mm->context

Not used any more.

Cc: "David S. Miller" <davem@...emloft.net>
Cc: sparclinux@...r.kernel.org
Signed-off-by: Dmitry Safonov <dima@...sta.com>
---
 arch/sparc/include/asm/mmu_64.h | 1 -
 arch/sparc/vdso/vma.c           | 5 +----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/sparc/include/asm/mmu_64.h b/arch/sparc/include/asm/mmu_64.h
index 7e2704c770e9..8e7892890d14 100644
--- a/arch/sparc/include/asm/mmu_64.h
+++ b/arch/sparc/include/asm/mmu_64.h
@@ -111,7 +111,6 @@ typedef struct {
 	unsigned long		thp_pte_count;
 	struct tsb_config	tsb_block[MM_NUM_TSBS];
 	struct hv_tsb_descr	tsb_descr[MM_NUM_TSBS];
-	void			*vdso;
 	bool			adi;
 	tag_storage_desc_t	*tag_store;
 	spinlock_t		tag_lock;
diff --git a/arch/sparc/vdso/vma.c b/arch/sparc/vdso/vma.c
index bf9195fe9bcc..255e052223ca 100644
--- a/arch/sparc/vdso/vma.c
+++ b/arch/sparc/vdso/vma.c
@@ -389,7 +389,6 @@ static int map_vdso(const struct vdso_image *image,
 	}
 
 	text_start = addr - image->sym_vvar_start;
-	current->mm->context.vdso = (void __user *)text_start;
 
 	/*
 	 * MAYWRITE to allow gdb to COW and set breakpoints
@@ -418,9 +417,7 @@ static int map_vdso(const struct vdso_image *image,
 	}
 
 up_fail:
-	if (ret)
-		current->mm->context.vdso = NULL;
-	else
+	if (!ret)
 		*sysinfo_ehdr = text_start;
 
 	mmap_write_unlock(mm);
-- 
2.29.2