From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
To: <linux-mips@linux-mips.org>, <Zubair.Kakakhel@imgtec.com>,
<geert+renesas@glider.be>, <david.daney@cavium.com>,
<peterz@infradead.org>, <paul.gortmaker@windriver.com>,
<davidlohr@hp.com>, <macro@linux-mips.org>, <chenhc@lemote.com>,
<cl@linux.com>, <mingo@kernel.org>, <richard@nod.at>,
<zajec5@gmail.com>, <james.hogan@imgtec.com>,
<keescook@chromium.org>, <tj@kernel.org>, <alex@alex-smith.me.uk>,
<pbonzini@redhat.com>, <blogic@openwrt.org>,
<paul.burton@imgtec.com>, <qais.yousef@imgtec.com>,
<linux-kernel@vger.kernel.org>, <ralf@linux-mips.org>,
<markos.chandras@imgtec.com>, <dengcheng.zhu@imgtec.com>,
<manuel.lauss@gmail.com>, <lars.persson@axis.com>
Subject: [PATCH v3 3/3] MIPS: set stack/data protection as non-executable
Date: Tue, 2 Dec 2014 17:58:24 -0800 [thread overview]
Message-ID: <20141203015824.13886.74616.stgit@linux-yegoshin> (raw)
In-Reply-To: <20141203015537.13886.50830.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 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index 3be81803595d..d49ba81cb4ed 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)
WARNING: multiple messages have this Message-ID (diff)
From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
To: linux-mips@linux-mips.org, Zubair.Kakakhel@imgtec.com,
geert+renesas@glider.be, david.daney@cavium.com,
peterz@infradead.org, paul.gortmaker@windriver.com,
davidlohr@hp.com, macro@linux-mips.org, chenhc@lemote.com,
cl@linux.com, mingo@kernel.org, richard@nod.at, zajec5@gmail.com,
james.hogan@imgtec.com, keescook@chromium.org, tj@kernel.org,
alex@alex-smith.me.uk, pbonzini@redhat.com, blogic@openwrt.org,
paul.burton@imgtec.com, qais.yousef@imgtec.com,
linux-kernel@vger.kernel.org, ralf@linux-mips.org,
markos.chandras@imgtec.com, dengcheng.zhu@imgtec.com,
manuel.lauss@gmail.com, lars.persson@axis.com
Subject: [PATCH v3 3/3] MIPS: set stack/data protection as non-executable
Date: Tue, 2 Dec 2014 17:58:24 -0800 [thread overview]
Message-ID: <20141203015824.13886.74616.stgit@linux-yegoshin> (raw)
Message-ID: <20141203015824.Zb9Q7klkk5GPjTPExks5mesZz_F4aqNHRy_dtY5aVEA@z> (raw)
In-Reply-To: <20141203015537.13886.50830.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 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index 3be81803595d..d49ba81cb4ed 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:[~2014-12-03 1:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-03 1:57 [PATCH v3 0/3] Series short description Leonid Yegoshin
2014-12-03 1:57 ` Leonid Yegoshin
2014-12-03 1:58 ` [PATCH v3 1/3] MIPS: mips_flush_cache_range is added Leonid Yegoshin
2014-12-03 1:58 ` Leonid Yegoshin
2014-12-03 1:58 ` [PATCH v3 2/3] MIPS: Setup an instruction emulation in VDSO protected page instead of user stack Leonid Yegoshin
2014-12-03 1:58 ` Leonid Yegoshin
2014-12-03 1:58 ` Leonid Yegoshin [this message]
2014-12-03 1:58 ` [PATCH v3 3/3] MIPS: set stack/data protection as non-executable Leonid Yegoshin
2014-12-05 17:28 ` David Daney
2014-12-05 18:51 ` Kees Cook
2014-12-05 19:06 ` David Daney
2014-12-05 19:41 ` Leonid Yegoshin
2014-12-05 19:41 ` Kees Cook
2014-12-05 19:44 ` Christoph Lameter
2014-12-05 21:41 ` David Daney
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