From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
To: <linux-mips@linux-mips.org>, <Zubair.Kakakhel@imgtec.com>,
<david.daney@cavium.com>, <peterz@infradead.org>,
<paul.gortmaker@windriver.com>, <davidlohr@hp.com>,
<macro@linux-mips.org>, <chenhc@lemote.com>, <zajec5@gmail.com>,
<james.hogan@imgtec.com>, <keescook@chromium.org>,
<alex@alex-smith.me.uk>, <tglx@linutronix.de>,
<blogic@openwrt.org>, <jchandra@broadcom.com>,
<paul.burton@imgtec.com>, <qais.yousef@imgtec.com>,
<linux-kernel@vger.kernel.org>, <ralf@linux-mips.org>,
<markos.chandras@imgtec.com>, <manuel.lauss@gmail.com>,
<akpm@linux-foundation.org>, <lars.persson@axis.com>
Subject: [PATCH 3/3] MIPS: set stack/data protection as non-executable
Date: Fri, 3 Oct 2014 20:17:39 -0700 [thread overview]
Message-ID: <20141004031739.28569.12863.stgit@linux-yegoshin> (raw)
In-Reply-To: <20141004030438.28569.85536.stgit@linux-yegoshin>
This is a last step of 3 patches which shift FPU emulation out of
stack into protected area. So, it disables a default executable stack.
Additionally, it sets a default data area non-executable protection.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
---
arch/mips/include/asm/page.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index 3be8180..d49ba81 100644
--- a/arch/mips/include/asm/page.h
+++ b/arch/mips/include/asm/page.h
@@ -230,7 +230,7 @@ extern int __virt_addr_valid(const volatile void *kaddr);
#define virt_addr_valid(kaddr) \
__virt_addr_valid((const volatile void *) (kaddr))
-#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
+#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
next prev parent reply other threads:[~2014-10-04 3:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-04 3:17 [PATCH 0/3] MIPS executable stack protection Leonid Yegoshin
2014-10-04 3:17 ` [PATCH 1/3] MIPS: mips_flush_cache_range is added Leonid Yegoshin
2014-10-04 3:17 ` [PATCH 2/3] MIPS: Setup an instruction emulation in VDSO protected page instead of user stack Leonid Yegoshin
2014-10-04 20:00 ` Peter Zijlstra
2014-10-05 5:52 ` Leonid Yegoshin
2014-10-06 12:29 ` Paul Burton
2014-10-06 20:42 ` Leonid Yegoshin
2014-10-06 18:05 ` David Daney
2014-10-06 20:03 ` Leonid Yegoshin
2014-10-04 3:17 ` Leonid Yegoshin [this message]
2014-10-04 8:23 ` [PATCH 0/3] MIPS executable stack protection Peter Zijlstra
2014-10-04 16:03 ` Linus Torvalds
2014-10-04 16:17 ` Leonid Yegoshin
2014-10-04 16:27 ` Linus Torvalds
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