From: Miroslav Benes <mbenes@suse.cz>
To: Will Deacon <will@kernel.org>
Cc: linux-kernel@vger.kernel.org, kernel-team@android.com,
akpm@linux-foundation.org,
"K . Prasad" <prasad@linux.vnet.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Frederic Weisbecker <frederic@kernel.org>,
Christoph Hellwig <hch@lst.de>,
Quentin Perret <qperret@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
live-patching@vger.kernel.org
Subject: Re: [PATCH 0/3] Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
Date: Tue, 25 Feb 2020 11:05:39 +0100 (CET) [thread overview]
Message-ID: <alpine.LSU.2.21.2002251104130.11531@pobox.suse.cz> (raw)
In-Reply-To: <20200221114404.14641-1-will@kernel.org>
CC live-patching ML, because this could affect many of its users...
On Fri, 21 Feb 2020, Will Deacon wrote:
> Hi folks,
>
> Despite having just a single modular in-tree user that I could spot,
> kallsyms_lookup_name() is exported to modules and provides a mechanism
> for out-of-tree modules to access and invoke arbitrary, non-exported
> kernel symbols when kallsyms is enabled.
>
> This patch series fixes up that one user and unexports the symbol along
> with kallsyms_on_each_symbol(), since that could also be abused in a
> similar manner.
>
> Cheers,
>
> Will
>
> Cc: K.Prasad <prasad@linux.vnet.ibm.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Frederic Weisbecker <frederic@kernel.org>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Quentin Perret <qperret@google.com>
> Cc: Alexei Starovoitov <ast@kernel.org>
> Cc: Masami Hiramatsu <mhiramat@kernel.org>
>
> --->8
>
> Will Deacon (3):
> samples/hw_breakpoint: Drop HW_BREAKPOINT_R when reporting writes
> samples/hw_breakpoint: Drop use of kallsyms_lookup_name()
> kallsyms: Unexport kallsyms_lookup_name() and
> kallsyms_on_each_symbol()
>
> kernel/kallsyms.c | 2 --
> samples/hw_breakpoint/data_breakpoint.c | 11 ++++++++---
> 2 files changed, 8 insertions(+), 5 deletions(-)
>
> --
> 2.25.0.265.gbab2e86ba0-goog
>
next prev parent reply other threads:[~2020-02-25 10:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 11:44 [PATCH 0/3] Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() Will Deacon
2020-02-21 11:44 ` [PATCH 1/3] samples/hw_breakpoint: Drop HW_BREAKPOINT_R when reporting writes Will Deacon
2020-02-21 14:12 ` Christoph Hellwig
2020-02-21 11:44 ` [PATCH 2/3] samples/hw_breakpoint: Drop use of kallsyms_lookup_name() Will Deacon
2020-02-21 14:13 ` Christoph Hellwig
2020-02-21 14:20 ` Will Deacon
2020-02-21 11:44 ` [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() Will Deacon
2020-02-21 11:53 ` Greg Kroah-Hartman
2020-02-21 14:14 ` Christoph Hellwig
2020-02-21 15:11 ` Alexei Starovoitov
2020-02-21 14:27 ` [PATCH 0/3] " Masami Hiramatsu
2020-02-21 14:48 ` Will Deacon
2020-02-21 23:44 ` Masami Hiramatsu
2020-02-21 15:41 ` David Laight
2020-02-21 16:25 ` Quentin Perret
2020-02-25 10:05 ` Miroslav Benes [this message]
2020-02-25 12:11 ` Petr Mladek
2020-02-25 15:00 ` Joe Lawrence
2020-02-25 18:01 ` Miroslav Benes
2020-02-26 14:16 ` Joe Lawrence
2020-03-02 19:28 ` Mathieu Desnoyers
2020-03-02 19:36 ` Greg Kroah-Hartman
2020-03-02 19:39 ` Greg Kroah-Hartman
2020-03-02 20:17 ` Mathieu Desnoyers
2020-03-03 6:57 ` Greg Kroah-Hartman
2020-03-03 16:58 ` Mathieu Desnoyers
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