linux-kernel - [QUERY] Why does perf-trace need me to be root?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 2 Oct 2013 14:50:49 +0530
From:	Ramkumar Ramachandra <artagnon@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: [QUERY] Why does perf-trace need me to be root?

Hi,

All the other perf tooling can be used as a normal user. At one point,
I had to touch /proc/sys/kernel/perf_event_paranoid to get me numbers
on a PMU event without a symbolic name, but that's about it.
perf-trace seems to be the exception though:

  artagnon|perf-core=:~/src/linux/tools/perf$ perf trace -a -e open
  Couldn't read the raw_syscalls tracepoints information!

The responsible codepath is:

  if (perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_enter",
trace__sys_enter) ||
     perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_exit",
trace__sys_exit)) {

I don't understand much of what's going on, but what can be done to
improve the situation for users?

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/