linux-kernel - [tip:perf/core] tracing: fix event

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

Message-ID: <tip-d631097577f6fe027f4903f62eabced6445d19bf@git.kernel.org>
Date:	Fri, 18 Nov 2011 15:04:45 -0800
From:	tip-bot for Ilya Dryomov <idryomov@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	idryomov@...il.com, rostedt@...dmis.org, tglx@...utronix.de
Subject: [tip:perf/core] tracing: fix event_subsystem ref counting

Commit-ID:  d631097577f6fe027f4903f62eabced6445d19bf
Gitweb:     http://git.kernel.org/tip/d631097577f6fe027f4903f62eabced6445d19bf
Author:     Ilya Dryomov <idryomov@...il.com>
AuthorDate: Mon, 31 Oct 2011 11:07:42 +0200
Committer:  Steven Rostedt <rostedt@...dmis.org>
CommitDate: Mon, 31 Oct 2011 13:59:23 -0400

tracing: fix event_subsystem ref counting

Fix a bug introduced by e9dbfae5, which prevents event_subsystem from
ever being released.

Ref_count was added to keep track of subsystem users, not for counting
events.  Subsystem is created with ref_count = 1, so there is no need to
increment it for every event, we have nr_events for that.  Fix this by
touching ref_count only when we actually have a new user -
subsystem_open().

Cc: stable@...r.kernel.org
Signed-off-by: Ilya Dryomov <idryomov@...il.com>
Link: http://lkml.kernel.org/r/1320052062-7846-1-git-send-email-idryomov@gmail.com
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 kernel/trace/trace_events.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 581876f..c212a7f 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1078,7 +1078,6 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
 	/* First see if we did not already create this dir */
 	list_for_each_entry(system, &event_subsystems, list) {
 		if (strcmp(system->name, name) == 0) {
-			__get_system(system);
 			system->nr_events++;
 			return system->entry;
 		}
--
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/