linux-kernel - Re: [PATCH v2 3/4] arm64: kprobes: Move exception

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Message-ID: <47b290e9-0dcc-d9cd-3a7d-f6a4c4c3ca60@arm.com>
Date:   Mon, 21 Jan 2019 12:08:59 +0000
From:   James Morse <james.morse@....com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Pratyush Anand <panand@...hat.com>,
        "David A . Long" <dave.long@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/4] arm64: kprobes: Move exception_text check in
 blacklist

Hi,

On 15/01/2019 06:25, Masami Hiramatsu wrote:
> Move exception/irqentry text address check in blacklist,
> since those are symbol based rejection.
> 
> If we prohibit probing on the symbols in exception_text,
> those should be blacklisted.

We need to blacklist this as its where do_debug_exception() lives, which kprobes
depends on for single-stepping.

Reviewed-by: James Morse <james.morse@....com>


Thanks!

James