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Groups > linux.kernel > #1346338
| From | David Long <dave.long@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v10 3/9] arm64: add copy_to/from_user to kprobes blacklist |
| Date | 2016-03-01 04:10 +0100 |
| Message-ID | <r7IRc-3lp-21@gated-at.bofh.it> (permalink) |
| References | <r7IHw-33a-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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
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[PATCH v10 0/9] arm64: Add kernel probes (kprobes) support David Long <dave.long@linaro.org> - 2016-03-01 04:00 +0100
[PATCH v10 2/9] arm64: Add more test functions to insn.c David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
[PATCH v10 1/9] arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
[PATCH v10 9/9] kprobes: Add arm64 case in kprobe example module David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
[PATCH v10 8/9] arm64: Add kernel return probes support (kretprobes) David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
[PATCH v10 7/9] arm64: Add trampoline code for kretprobes David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
Re: [PATCH v10 7/9] arm64: Add trampoline code for kretprobes Marc Zyngier <marc.zyngier@arm.com> - 2016-03-01 19:20 +0100
Re: [PATCH v10 7/9] arm64: Add trampoline code for kretprobes William Cohen <wcohen@redhat.com> - 2016-03-02 22:30 +0100
[PATCH v10 4/9] arm64: add conditional instruction simulation support David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
Re: [PATCH v10 4/9] arm64: add conditional instruction simulation support Marc Zyngier <marc.zyngier@arm.com> - 2016-03-01 18:50 +0100
Re: [PATCH v10 4/9] arm64: add conditional instruction simulation support David Long <dave.long@linaro.org> - 2016-03-02 06:20 +0100
[PATCH v10 5/9] arm64: Kprobes with single stepping support David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
[PATCH v10 6/9] arm64: kprobes instruction simulation support David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
Re: [PATCH v10 6/9] arm64: kprobes instruction simulation support Marc Zyngier <marc.zyngier@arm.com> - 2016-03-01 19:10 +0100
Re: [PATCH v10 6/9] arm64: kprobes instruction simulation support David Long <dave.long@linaro.org> - 2016-03-03 06:10 +0100
Re: [PATCH v10 6/9] arm64: kprobes instruction simulation support Marc Zyngier <marc.zyngier@arm.com> - 2016-03-03 09:10 +0100
Re: [PATCH v10 6/9] arm64: kprobes instruction simulation support David Long <dave.long@linaro.org> - 2016-03-03 16:20 +0100
Re: [PATCH v10 6/9] arm64: kprobes instruction simulation support Marc Zyngier <marc.zyngier@arm.com> - 2016-03-03 16:40 +0100
[PATCH v10 3/9] arm64: add copy_to/from_user to kprobes blacklist David Long <dave.long@linaro.org> - 2016-03-01 04:10 +0100
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