All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH] sched/cpufreq: Fix kobject memleak
@ 2019-04-30  0:11 Tobin C. Harding
  2019-04-30  4:22 ` Ingo Molnar
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: Tobin C. Harding @ 2019-04-30  0:11 UTC (permalink / raw)
  To: Ingo Molnar, Peter Zijlstra
  Cc: Tobin C. Harding, Greg Kroah-Hartman, linux-kernel

Currently error return from kobject_init_and_add() is not followed by a
call to kobject_put().  This means there is a memory leak.

Add call to kobject_put() in error path of kobject_init_and_add().
---
 kernel/sched/cpufreq_schedutil.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 5c41ea367422..3638d2377e3c 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -771,6 +771,7 @@ static int sugov_init(struct cpufreq_policy *policy)
 	return 0;
 
 fail:
+	kobject_put(&tunables->attr_set.kobj);
 	policy->governor_data = NULL;
 	sugov_tunables_free(tunables);
 
-- 
2.21.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [PATCH] sched/cpufreq: Fix kobject memleak
  2019-04-30  0:11 [PATCH] sched/cpufreq: Fix kobject memleak Tobin C. Harding
@ 2019-04-30  4:22 ` Ingo Molnar
  2019-04-30  5:52 ` [tip:sched/urgent] " tip-bot for Tobin C. Harding
  2019-04-30  6:01 ` tip-bot for Tobin C. Harding
  2 siblings, 0 replies; 6+ messages in thread
From: Ingo Molnar @ 2019-04-30  4:22 UTC (permalink / raw)
  To: Tobin C. Harding
  Cc: Ingo Molnar, Peter Zijlstra, Greg Kroah-Hartman, linux-kernel


* Tobin C. Harding <tobin@kernel.org> wrote:

> Currently error return from kobject_init_and_add() is not followed by a
> call to kobject_put().  This means there is a memory leak.
> 
> Add call to kobject_put() in error path of kobject_init_and_add().
> ---
>  kernel/sched/cpufreq_schedutil.c | 1 +
>  1 file changed, 1 insertion(+)

I've added your:

   Signed-off-by: Tobin C. Harding <tobin@kernel.org>

Which I suppose you intended to include?

Thanks,

	Ingo

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [tip:sched/urgent] sched/cpufreq: Fix kobject memleak
  2019-04-30  0:11 [PATCH] sched/cpufreq: Fix kobject memleak Tobin C. Harding
  2019-04-30  4:22 ` Ingo Molnar
@ 2019-04-30  5:52 ` tip-bot for Tobin C. Harding
  2019-04-30  5:56   ` Viresh Kumar
  2019-04-30  6:01 ` tip-bot for Tobin C. Harding
  2 siblings, 1 reply; 6+ messages in thread
From: tip-bot for Tobin C. Harding @ 2019-04-30  5:52 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: linux-kernel, rafael.j.wysocki, mingo, tglx, hpa, gregkh,
	viresh.kumar, tobin, peterz, vincent.guittot, torvalds

Commit-ID:  8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
Gitweb:     https://git.kernel.org/tip/8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
Author:     Tobin C. Harding <tobin@kernel.org>
AuthorDate: Tue, 30 Apr 2019 10:11:44 +1000
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 30 Apr 2019 06:24:09 +0200

sched/cpufreq: Fix kobject memleak

Currently the error return path from kobject_init_and_add() is not
followed by a call to kobject_put() - which means we are leaking
the kobject.

Fix it by adding a call to kobject_put() in the error path of
kobject_init_and_add().

Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Add call to kobject_put() in error path of kobject_init_and_add().
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tobin C. Harding <tobin@kernel.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Link: http://lkml.kernel.org/r/20190430001144.24890-1-tobin@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/cpufreq_schedutil.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 5c41ea367422..3638d2377e3c 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -771,6 +771,7 @@ out:
 	return 0;
 
 fail:
+	kobject_put(&tunables->attr_set.kobj);
 	policy->governor_data = NULL;
 	sugov_tunables_free(tunables);
 

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [tip:sched/urgent] sched/cpufreq: Fix kobject memleak
  2019-04-30  5:52 ` [tip:sched/urgent] " tip-bot for Tobin C. Harding
@ 2019-04-30  5:56   ` Viresh Kumar
  2019-04-30  6:27     ` Tobin C. Harding
  0 siblings, 1 reply; 6+ messages in thread
From: Viresh Kumar @ 2019-04-30  5:56 UTC (permalink / raw)
  To: mingo
  Cc: torvalds, gregkh, hpa, tglx, vincent.guittot, peterz,
	rafael.j.wysocki, tobin, linux-kernel, linux-tip-commits

On 29-04-19, 22:52, tip-bot for Tobin C. Harding wrote:
> Commit-ID:  8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> Gitweb:     https://git.kernel.org/tip/8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> Author:     Tobin C. Harding <tobin@kernel.org>
> AuthorDate: Tue, 30 Apr 2019 10:11:44 +1000
> Committer:  Ingo Molnar <mingo@kernel.org>
> CommitDate: Tue, 30 Apr 2019 06:24:09 +0200
> 
> sched/cpufreq: Fix kobject memleak
> 
> Currently the error return path from kobject_init_and_add() is not
> followed by a call to kobject_put() - which means we are leaking
> the kobject.
> 
> Fix it by adding a call to kobject_put() in the error path of
> kobject_init_and_add().
> 
> Signed-off-by: Tobin C. Harding <tobin@kernel.org>
> Add call to kobject_put() in error path of kobject_init_and_add().

This should have been present before the signed-off ?

> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Tobin C. Harding <tobin@kernel.org>
> Cc: Vincent Guittot <vincent.guittot@linaro.org>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Link: http://lkml.kernel.org/r/20190430001144.24890-1-tobin@kernel.org
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> ---
>  kernel/sched/cpufreq_schedutil.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
> index 5c41ea367422..3638d2377e3c 100644
> --- a/kernel/sched/cpufreq_schedutil.c
> +++ b/kernel/sched/cpufreq_schedutil.c
> @@ -771,6 +771,7 @@ out:
>  	return 0;
>  
>  fail:
> +	kobject_put(&tunables->attr_set.kobj);
>  	policy->governor_data = NULL;
>  	sugov_tunables_free(tunables);
>  

-- 
viresh

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [tip:sched/urgent] sched/cpufreq: Fix kobject memleak
  2019-04-30  0:11 [PATCH] sched/cpufreq: Fix kobject memleak Tobin C. Harding
  2019-04-30  4:22 ` Ingo Molnar
  2019-04-30  5:52 ` [tip:sched/urgent] " tip-bot for Tobin C. Harding
@ 2019-04-30  6:01 ` tip-bot for Tobin C. Harding
  2 siblings, 0 replies; 6+ messages in thread
From: tip-bot for Tobin C. Harding @ 2019-04-30  6:01 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: linux-kernel, tobin, gregkh, tglx, hpa, peterz, vincent.guittot,
	viresh.kumar, mingo, torvalds, rafael.j.wysocki

Commit-ID:  9a4f26cc98d81b67ecc23b890c28e2df324e29f3
Gitweb:     https://git.kernel.org/tip/9a4f26cc98d81b67ecc23b890c28e2df324e29f3
Author:     Tobin C. Harding <tobin@kernel.org>
AuthorDate: Tue, 30 Apr 2019 10:11:44 +1000
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 30 Apr 2019 07:57:23 +0200

sched/cpufreq: Fix kobject memleak

Currently the error return path from kobject_init_and_add() is not
followed by a call to kobject_put() - which means we are leaking
the kobject.

Fix it by adding a call to kobject_put() in the error path of
kobject_init_and_add().

Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tobin C. Harding <tobin@kernel.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Link: http://lkml.kernel.org/r/20190430001144.24890-1-tobin@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/cpufreq_schedutil.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 5c41ea367422..3638d2377e3c 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -771,6 +771,7 @@ out:
 	return 0;
 
 fail:
+	kobject_put(&tunables->attr_set.kobj);
 	policy->governor_data = NULL;
 	sugov_tunables_free(tunables);
 

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [tip:sched/urgent] sched/cpufreq: Fix kobject memleak
  2019-04-30  5:56   ` Viresh Kumar
@ 2019-04-30  6:27     ` Tobin C. Harding
  0 siblings, 0 replies; 6+ messages in thread
From: Tobin C. Harding @ 2019-04-30  6:27 UTC (permalink / raw)
  To: Viresh Kumar
  Cc: mingo, torvalds, gregkh, hpa, tglx, vincent.guittot, peterz,
	rafael.j.wysocki, tobin, linux-kernel, linux-tip-commits

On Tue, Apr 30, 2019 at 11:26:27AM +0530, Viresh Kumar wrote:
> On 29-04-19, 22:52, tip-bot for Tobin C. Harding wrote:
> > Commit-ID:  8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> > Gitweb:     https://git.kernel.org/tip/8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> > Author:     Tobin C. Harding <tobin@kernel.org>
> > AuthorDate: Tue, 30 Apr 2019 10:11:44 +1000
> > Committer:  Ingo Molnar <mingo@kernel.org>
> > CommitDate: Tue, 30 Apr 2019 06:24:09 +0200
> > 
> > sched/cpufreq: Fix kobject memleak
> > 
> > Currently the error return path from kobject_init_and_add() is not
> > followed by a call to kobject_put() - which means we are leaking
> > the kobject.
> > 
> > Fix it by adding a call to kobject_put() in the error path of
> > kobject_init_and_add().
> > 
> > Signed-off-by: Tobin C. Harding <tobin@kernel.org>
> > Add call to kobject_put() in error path of kobject_init_and_add().
> 
> This should have been present before the signed-off ?

Thanks.  Some face palm fails on this patch.  Its hard to get good help
:)

	Tobin

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-04-30  6:27 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-30  0:11 [PATCH] sched/cpufreq: Fix kobject memleak Tobin C. Harding
2019-04-30  4:22 ` Ingo Molnar
2019-04-30  5:52 ` [tip:sched/urgent] " tip-bot for Tobin C. Harding
2019-04-30  5:56   ` Viresh Kumar
2019-04-30  6:27     ` Tobin C. Harding
2019-04-30  6:01 ` tip-bot for Tobin C. Harding

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.