From: David Long <dave.long@linaro.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>,
William Cohen <wcohen@redhat.com>,
Pratyush Anand <panand@redhat.com>,
Steve Capper <steve.capper@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>
Cc: "Dave P Martin" <Dave.Martin@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Robin Murphy" <Robin.Murphy@arm.com>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Jens Wiklander" <jens.wiklander@linaro.org>,
"Christoffer Dall" <christoffer.dall@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Yang Shi" <yang.shi@linaro.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Suzuki K. Poulose" <suzuki.poulose@arm.com>,
"Kees Cook" <keescook@chromium.org>,
"Zi Shen Lim" <zlim.lnx@gmail.com>,
"John Blackwood" <john.blackwood@ccur.com>,
"Feng Kan" <fkan@apm.com>,
"Balamurugan Shanmugam" <bshanmugam@apm.com>,
"James Morse" <james.morse@arm.com>,
"Vladimir Murzin" <Vladimir.Murzin@arm.com>,
"Mark Salyzyn" <salyzyn@android.com>,
"Petr Mladek" <pmladek@suse.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Mark Brown" <broonie@kernel.org>
Subject: [PATCH v10 3/9] arm64: add copy_to/from_user to kprobes blacklist
Date: Mon, 29 Feb 2016 21:57:21 -0500 [thread overview]
Message-ID: <1456801047-29014-4-git-send-email-dave.long@linaro.org> (raw)
In-Reply-To: <1456801047-29014-1-git-send-email-dave.long@linaro.org>
From: "David A. Long" <dave.long@linaro.org>
Currrently taking exceptions when accessing user data from a kprobe'd
instruction doesn't work. Avoid this situation by blacklisting the relevant
functions.
Signed-off-by: David A. Long <dave.long@linaro.org>
---
arch/arm64/lib/copy_from_user.S | 1 +
arch/arm64/lib/copy_to_user.S | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S
index 4699cd7..0ac2131 100644
--- a/arch/arm64/lib/copy_from_user.S
+++ b/arch/arm64/lib/copy_from_user.S
@@ -66,6 +66,7 @@
.endm
end .req x5
+ .section .kprobes.text,"ax",%progbits
ENTRY(__copy_from_user)
ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_HAS_PAN, \
CONFIG_ARM64_PAN)
diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S
index 7512bbb..e4eb84c 100644
--- a/arch/arm64/lib/copy_to_user.S
+++ b/arch/arm64/lib/copy_to_user.S
@@ -65,6 +65,7 @@
.endm
end .req x5
+ .section .kprobes.text,"ax",%progbits
ENTRY(__copy_to_user)
ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_HAS_PAN, \
CONFIG_ARM64_PAN)
--
2.5.0
next prev parent reply other threads:[~2016-03-01 3:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-01 2:57 [PATCH v10 0/9] arm64: Add kernel probes (kprobes) support David Long
2016-03-01 2:57 ` [PATCH v10 1/9] arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature David Long
2016-03-14 9:41 ` 平松雅巳 / HIRAMATU，MASAMI
2016-03-01 2:57 ` [PATCH v10 2/9] arm64: Add more test functions to insn.c David Long
2016-03-01 2:57 ` David Long [this message]
2016-03-01 2:57 ` [PATCH v10 4/9] arm64: add conditional instruction simulation support David Long
2016-03-01 17:43 ` Marc Zyngier
2016-03-02 5:14 ` David Long
2016-03-01 2:57 ` [PATCH v10 5/9] arm64: Kprobes with single stepping support David Long
2016-03-01 2:57 ` [PATCH v10 6/9] arm64: kprobes instruction simulation support David Long
2016-03-01 18:04 ` Marc Zyngier
2016-03-03 5:02 ` David Long
2016-03-03 8:01 ` Marc Zyngier
2016-03-03 15:14 ` David Long
2016-03-03 15:32 ` Marc Zyngier
2016-03-01 2:57 ` [PATCH v10 7/9] arm64: Add trampoline code for kretprobes David Long
2016-03-01 18:19 ` Marc Zyngier
2016-03-02 21:20 ` William Cohen
2016-03-08 5:42 ` David Long
2016-03-01 2:57 ` [PATCH v10 8/9] arm64: Add kernel return probes support (kretprobes) David Long
2016-03-01 2:57 ` [PATCH v10 9/9] kprobes: Add arm64 case in kprobe example module David Long
2016-03-14 9:36 ` [PATCH v10 0/9] arm64: Add kernel probes (kprobes) support 平松雅巳 / HIRAMATU，MASAMI
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