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From: "Tobin C. Harding" <me@tobin.cc>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Felix Fietkau <nbd@nbd.name>,
	kernel-hardening@lists.openwall.com,
	Tycho Andersen <tycho@tycho.ws>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Alexei Starovoitov <ast@kernel.org>,
	linux-kernel@vger.kernel.org,
	Network Development <netdev@vger.kernel.org>
Subject: [kernel-hardening] Re: [PATCH 1/3] kallsyms: don't leak address when symbol not found
Date: Tue, 19 Dec 2017 11:24:18 +1100	[thread overview]
Message-ID: <20171219002418.GF19604@eros> (raw)
In-Reply-To: <20171218184324.527ffd0e@gandalf.local.home>

On Mon, Dec 18, 2017 at 06:43:24PM -0500, Steven Rostedt wrote:
> On Tue, 19 Dec 2017 09:41:29 +1100
> "Tobin C. Harding" <me@tobin.cc> wrote:
> 
> > Current suggestion on list is to remove this function. Do you have a use
> > case in mind where debugging will break? We could add a fix to this
> > series if so. Otherwise next version will likely drop
> > string_is_no_symbol()
> 
> What about adding a kernel command line parameter that lets one put
> back the old behavior.
> 
> "insecure_print_all_symbols" ?

Cool. I've not done that before it will be a good learning
experience. I'll hack it up and see what people think.

thanks,
Tobin.

WARNING: multiple messages have this Message-ID (diff)
From: "Tobin C. Harding" <me@tobin.cc>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Felix Fietkau <nbd@nbd.name>,
	kernel-hardening@lists.openwall.com,
	Tycho Andersen <tycho@tycho.ws>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Alexei Starovoitov <ast@kernel.org>,
	linux-kernel@vger.kernel.org,
	Network Development <netdev@vger.kernel.org>
Subject: Re: [PATCH 1/3] kallsyms: don't leak address when symbol not found
Date: Tue, 19 Dec 2017 11:24:18 +1100	[thread overview]
Message-ID: <20171219002418.GF19604@eros> (raw)
In-Reply-To: <20171218184324.527ffd0e@gandalf.local.home>

On Mon, Dec 18, 2017 at 06:43:24PM -0500, Steven Rostedt wrote:
> On Tue, 19 Dec 2017 09:41:29 +1100
> "Tobin C. Harding" <me@tobin.cc> wrote:
> 
> > Current suggestion on list is to remove this function. Do you have a use
> > case in mind where debugging will break? We could add a fix to this
> > series if so. Otherwise next version will likely drop
> > string_is_no_symbol()
> 
> What about adding a kernel command line parameter that lets one put
> back the old behavior.
> 
> "insecure_print_all_symbols" ?

Cool. I've not done that before it will be a good learning
experience. I'll hack it up and see what people think.

thanks,
Tobin.

  reply	other threads:[~2017-12-19  0:24 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-17 23:53 [kernel-hardening] [PATCH 0/3] kallsyms: don't leak address Tobin C. Harding
2017-12-17 23:53 ` Tobin C. Harding
2017-12-17 23:53 ` [kernel-hardening] [PATCH 1/3] kallsyms: don't leak address when symbol not found Tobin C. Harding
2017-12-17 23:53   ` Tobin C. Harding
2017-12-18  9:55   ` [kernel-hardening] " Felix Fietkau
2017-12-18  9:55     ` Felix Fietkau
2017-12-18 22:41     ` [kernel-hardening] " Tobin C. Harding
2017-12-18 22:41       ` Tobin C. Harding
2017-12-18 23:43       ` [kernel-hardening] " Steven Rostedt
2017-12-18 23:43         ` Steven Rostedt
2017-12-19  0:24         ` Tobin C. Harding [this message]
2017-12-19  0:24           ` Tobin C. Harding
2017-12-17 23:53 ` [kernel-hardening] [PATCH 2/3] vsprintf: print <no-symbol> if " Tobin C. Harding
2017-12-17 23:53   ` Tobin C. Harding
2017-12-18  0:04   ` [kernel-hardening] " Joe Perches
2017-12-18  0:04     ` Joe Perches
2017-12-18  1:04     ` [kernel-hardening] " Tobin C. Harding
2017-12-18  1:04       ` Tobin C. Harding
2017-12-17 23:53 ` [kernel-hardening] [PATCH 3/3] trace: print address " Tobin C. Harding
2017-12-17 23:53   ` Tobin C. Harding
2017-12-18 16:49   ` [kernel-hardening] " Steven Rostedt
2017-12-18 16:49     ` Steven Rostedt
2017-12-18 21:16     ` [kernel-hardening] " Tobin C. Harding
2017-12-18 21:16       ` Tobin C. Harding
2017-12-18 23:51       ` [kernel-hardening] " Steven Rostedt
2017-12-18 23:51         ` Steven Rostedt
2017-12-19  0:22         ` [kernel-hardening] " Tobin C. Harding
2017-12-19  0:22           ` Tobin C. Harding
2017-12-19  3:00         ` [kernel-hardening] " Tobin C. Harding
2017-12-19  3:00           ` Tobin C. Harding
2017-12-19  3:02           ` [kernel-hardening] " Tobin C. Harding
2017-12-19  3:02             ` Tobin C. Harding
2017-12-19  3:37           ` [kernel-hardening] " Steven Rostedt
2017-12-19  3:37             ` Steven Rostedt
2017-12-19  4:20             ` [kernel-hardening] " Tobin C. Harding
2017-12-19  4:20               ` Tobin C. Harding
2017-12-18 22:35     ` [kernel-hardening] " Tobin C. Harding
2017-12-18 22:35       ` Tobin C. Harding
2017-12-19 23:19   ` [kernel-hardening] " kbuild test robot
2017-12-19 23:19     ` kbuild test robot
2017-12-19 23:39   ` [kernel-hardening] " kbuild test robot
2017-12-19 23:39     ` kbuild test robot
2017-12-18  5:31 ` [kernel-hardening] [PATCH 0/3] kallsyms: don't leak address Michael Ellerman
2017-12-18  5:31   ` Michael Ellerman
2017-12-18  6:00   ` Tobin C. Harding
2017-12-18  9:17     ` Tobin C. Harding

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