[PATCH 3/8] arm64: add copy_to/from_user to kprobes blacklist
From: David Long <hidden>
Date: 2016-02-18 23:48:38
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: "David A. Long" <redacted> 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 <redacted> --- 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)
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2.5.0