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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