Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 45/65] arm64: hyp-stub: Forbid kprobing of the hyp-stub | Date | Mon, 4 Feb 2019 11:36:38 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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From: James Morse <james.morse@arm.com>
commit 8fac5cbdfe0f01254d9d265c6aa1a95f94f58595 upstream.
The hyp-stub is loaded by the kernel's early startup code at EL2 during boot, before KVM takes ownership later. The hyp-stub's text is part of the regular kernel text, meaning it can be kprobed.
A breakpoint in the hyp-stub causes the CPU to spin in el2_sync_invalid.
Add it to the __hyp_text.
Signed-off-by: James Morse <james.morse@arm.com> Cc: stable@vger.kernel.org Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/arm64/kernel/hyp-stub.S | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -26,6 +26,8 @@ #include <asm/virt.h> .text + .pushsection .hyp.text, "ax" + .align 11 ENTRY(__hyp_stub_vectors)
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