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Message-Id: <166994752269.439920.4801339965959400456.stgit@devnote3>
Date: Fri, 2 Dec 2022 11:18:42 +0900
From: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>,
Mark Brown <broonie@...nel.org>,
Kalesh Singh <kaleshsingh@...gle.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Marc Zyngier <maz@...nel.org>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>
Subject: [PATCH v2 2/3] arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Since arm64's do_page_fault() can handle the page fault correctly
than kprobe_fault_handler() according to the context, let it handle
the page fault instead of simply call fixup_exception() in the
kprobe_fault_handler().
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Acked-by: Mark Rutland <mark.rutland@....com>
---
arch/arm64/kernel/probes/kprobes.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index c9e4d0720285..d2ae37f89774 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -294,14 +294,6 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr)
}
break;
- case KPROBE_HIT_ACTIVE:
- case KPROBE_HIT_SSDONE:
- /*
- * In case the user-specified fault handler returned
- * zero, try to fix up.
- */
- if (fixup_exception(regs))
- return 1;
}
return 0;
}
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