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Message-ID: <20171109131111.499057ab@gandalf.local.home>
Date: Thu, 9 Nov 2017 13:11:11 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Kaiwan N Billimoria <kaiwan.billimoria@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Laura Abbott
<labbott@...hat.com>, "Tobin C. Harding" <me@...in.cc>,
"kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>, "Jason A. Donenfeld"
<Jason@...c4.com>, "Theodore Ts'o" <tytso@....edu>, Kees Cook
<keescook@...omium.org>, Paolo Bonzini <pbonzini@...hat.com>, Tycho
Andersen <tycho@...ker.com>, "Roberts, William C"
<william.c.roberts@...el.com>, Tejun Heo <tj@...nel.org>, Jordan Glover
<Golden_Miller83@...tonmail.ch>, Greg KH <gregkh@...uxfoundation.org>, Petr
Mladek <pmladek@...e.com>, Joe Perches <joe@...ches.com>, Ian Campbell
<ijc@...lion.org.uk>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon
<wilal.deacon@....com>, Chris Fries <cfries@...gle.com>, Dave Weinstein
<olorin@...gle.com>, Daniel Micay <danielmicay@...il.com>, Djalal Harouni
<tixxdz@...il.com>, Linux Kernel Mailing List
<linux-kernel@...r.kernel.org>, Network Development
<netdev@...r.kernel.org>, David Miller <davem@...emloft.net>
Subject: Re: [PATCH v4] scripts: add leaking_addresses.pl
On Thu, 9 Nov 2017 10:24:32 +0530
Kaiwan N Billimoria <kaiwan.billimoria@...il.com> wrote:
> On Thu, Nov 9, 2017 at 10:13 AM, Kaiwan N Billimoria
> <kaiwan.billimoria@...il.com> wrote:
> >> But I don't know if there is anything else than the profiling code
> >> that _really_ wants access to /proc/kallsyms in user space as a
> >> regular user.
> >
>
> Front-ends to ftrace, like trace-cmd?
> [from the trace-cmd git repo (Steve Rostedt, pl stand up, pl stand up :-)
> Documentation/trace-cmd-restore.1.txt :
Yes, profiling and tracing are similar. And you need to be root to run
the recording anyway. Thus, as long as root user can read kallsyms,
trace-cmd should be fine. As trace-cmd requires root access to do any
ftrace tracing.
-- Steve
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