* [PATCH] blkcg:Fix memory leaks in blkg_conf_prep()
@ 2020-05-18 12:36 ` Wu Bo
0 siblings, 0 replies; 6+ messages in thread
From: Wu Bo @ 2020-05-18 12:36 UTC (permalink / raw)
To: tj, axboe
Cc: cgroups, linux-block, Markus.Elfring, linux-kernel,
liuzhiqiang26, linfeilong, wubo40
From: Wu Bo <wubo40@huawei.com>
If a call of the function blkg_lookup_check() failed,
we should be release the previously allocated block group
before jumping to the lable 'fail_unlock' in the implementation of
the function blkg_conf_prep().
Suggested-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Wu Bo <wubo40@huawei.com>
---
V2: omit the source code quotation from
the change description
---
block/blk-cgroup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 930212c..afeb769 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -682,6 +682,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
blkg = blkg_lookup_check(pos, pol, q);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
+ blkg_free(new_blkg);
goto fail_unlock;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH] blkcg:Fix memory leaks in blkg_conf_prep()
@ 2020-05-18 12:36 ` Wu Bo
0 siblings, 0 replies; 6+ messages in thread
From: Wu Bo @ 2020-05-18 12:36 UTC (permalink / raw)
To: tj-DgEjT+Ai2ygdnm+yROfE0A, axboe-tSWWG44O7X1aa/9Udqfwiw
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA,
linux-block-u79uwXL29TY76Z2rM5mHXA, Markus.Elfring-S0/GAf8tV78,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
liuzhiqiang26-hv44wF8Li93QT0dZR+AlfA,
linfeilong-hv44wF8Li93QT0dZR+AlfA, wubo40-hv44wF8Li93QT0dZR+AlfA
From: Wu Bo <wubo40-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
If a call of the function blkg_lookup_check() failed,
we should be release the previously allocated block group
before jumping to the lable 'fail_unlock' in the implementation of
the function blkg_conf_prep().
Suggested-by: Markus Elfring <Markus.Elfring-S0/GAf8tV78@public.gmane.org>
Signed-off-by: Wu Bo <wubo40-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
V2: omit the source code quotation from
the change description
---
block/blk-cgroup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 930212c..afeb769 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -682,6 +682,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
blkg = blkg_lookup_check(pos, pol, q);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
+ blkg_free(new_blkg);
goto fail_unlock;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2] blkcg: Fix memory leak in blkg_conf_prep()
2020-05-18 12:36 ` Wu Bo
(?)
@ 2020-05-18 14:06 ` Markus Elfring
-1 siblings, 0 replies; 6+ messages in thread
From: Markus Elfring @ 2020-05-18 14:06 UTC (permalink / raw)
To: Wu Bo, cgroups, linux-block
Cc: linux-kernel, kernel-janitors, Feilong Lin, Jens Axboe,
Tejun Heo, Zhiqiang Liu
> If a call of the function blkg_lookup_check() failed,
Thanks that you would like to integrate something from my suggestion.
> we should be release the previously allocated block group
I find that an other wording would be preferred over “we should”.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce#n151
> before jumping to the lable 'fail_unlock' in the implementation of
Please avoid another typo here.
> the function blkg_conf_prep().
>
> Suggested-by: Markus Elfring <Markus.Elfring@web.de>
I find this tag questionable because the bug fix was presented before.
https://lore.kernel.org/linux-block/4c670a6c-98c3-2b14-7438-09199506d92f@web.de/
https://lkml.org/lkml/2020/5/15/779
> ---
> V2: omit the source code quotation from
> the change description
* I recommend to improve also the patch subject accordingly.
* Would you like to move the name from the previous tag into
this information?
> ---
> block/blk-cgroup.c | 1 +
I suggest to omit the triple dashes before this diffstat.
Regards,
Markus
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2] blkcg: Fix memory leak in blkg_conf_prep()
@ 2020-05-18 14:06 ` Markus Elfring
0 siblings, 0 replies; 6+ messages in thread
From: Markus Elfring @ 2020-05-18 14:06 UTC (permalink / raw)
To: Wu Bo, cgroups, linux-block
Cc: linux-kernel, kernel-janitors, Feilong Lin, Jens Axboe,
Tejun Heo, Zhiqiang Liu
> If a call of the function blkg_lookup_check() failed,
Thanks that you would like to integrate something from my suggestion.
> we should be release the previously allocated block group
I find that an other wording would be preferred over “we should”.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce#n151
> before jumping to the lable 'fail_unlock' in the implementation of
Please avoid another typo here.
> the function blkg_conf_prep().
>
> Suggested-by: Markus Elfring <Markus.Elfring@web.de>
I find this tag questionable because the bug fix was presented before.
https://lore.kernel.org/linux-block/4c670a6c-98c3-2b14-7438-09199506d92f@web.de/
https://lkml.org/lkml/2020/5/15/779
> ---
> V2: omit the source code quotation from
> the change description
* I recommend to improve also the patch subject accordingly.
* Would you like to move the name from the previous tag into
this information?
> ---
> block/blk-cgroup.c | 1 +
I suggest to omit the triple dashes before this diffstat.
Regards,
Markus
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2] blkcg: Fix memory leak in blkg_conf_prep()
@ 2020-05-18 14:06 ` Markus Elfring
0 siblings, 0 replies; 6+ messages in thread
From: Markus Elfring @ 2020-05-18 14:06 UTC (permalink / raw)
To: Wu Bo, cgroups-u79uwXL29TY76Z2rM5mHXA,
linux-block-u79uwXL29TY76Z2rM5mHXA
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA,
kernel-janitors-u79uwXL29TY76Z2rM5mHXA, Feilong Lin, Jens Axboe,
Tejun Heo, Zhiqiang Liu
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="windows-1254", Size: 1210 bytes --]
> If a call of the function blkg_lookup_check() failed,
Thanks that you would like to integrate something from my suggestion.
> we should be release the previously allocated block group
I find that an other wording would be preferred over “we should”.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce#n151
> before jumping to the lable 'fail_unlock' in the implementation of
Please avoid another typo here.
> the function blkg_conf_prep().
>
> Suggested-by: Markus Elfring <Markus.Elfring-S0/GAf8tV78@public.gmane.org>
I find this tag questionable because the bug fix was presented before.
https://lore.kernel.org/linux-block/4c670a6c-98c3-2b14-7438-09199506d92f@web.de/
https://lkml.org/lkml/2020/5/15/779
> ---
> V2: omit the source code quotation from
> the change description
* I recommend to improve also the patch subject accordingly.
* Would you like to move the name from the previous tag into
this information?
> ---
> block/blk-cgroup.c | 1 +
I suggest to omit the triple dashes before this diffstat.
Regards,
Markus
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] blkcg:Fix memory leaks in blkg_conf_prep()
2020-05-18 12:36 ` Wu Bo
(?)
(?)
@ 2020-05-26 17:23 ` Tejun Heo
-1 siblings, 0 replies; 6+ messages in thread
From: Tejun Heo @ 2020-05-26 17:23 UTC (permalink / raw)
To: Wu Bo
Cc: axboe, cgroups, linux-block, Markus.Elfring, linux-kernel,
liuzhiqiang26, linfeilong
On Mon, May 18, 2020 at 08:36:06PM +0800, Wu Bo wrote:
> From: Wu Bo <wubo40@huawei.com>
>
> If a call of the function blkg_lookup_check() failed,
> we should be release the previously allocated block group
> before jumping to the lable 'fail_unlock' in the implementation of
> the function blkg_conf_prep().
>
> Suggested-by: Markus Elfring <Markus.Elfring@web.de>
> Signed-off-by: Wu Bo <wubo40@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-05-26 17:24 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-18 12:36 [PATCH] blkcg:Fix memory leaks in blkg_conf_prep() Wu Bo
2020-05-18 12:36 ` Wu Bo
2020-05-18 14:06 ` [PATCH v2] blkcg: Fix memory leak " Markus Elfring
2020-05-18 14:06 ` Markus Elfring
2020-05-18 14:06 ` Markus Elfring
2020-05-26 17:23 ` [PATCH] blkcg:Fix memory leaks " Tejun Heo
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