From mboxrd@z Thu Jan 1 00:00:00 1970 From: dave.long@linaro.org (David Long) Date: Thu, 18 Feb 2016 18:48:16 -0500 Subject: [PATCH 3/8] arm64: add copy_to/from_user to kprobes blacklist In-Reply-To: <1455839301-26464-1-git-send-email-dave.long@linaro.org> References: <1455839301-26464-1-git-send-email-dave.long@linaro.org> Message-ID: <1455839301-26464-4-git-send-email-dave.long@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: "David A. Long" 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 --- 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