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    Subject[PATCH 2/3] arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler
    Date
    From: Masami Hiramatsu (Google) <mhiramat@kernel.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@kernel.org>
    ---
    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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