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[PATCH] softmmu: Fix dirtylimit memory leak

alloc.young@outlook.com posted 1 patch 2 years, 5 months ago
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/SA1PR11MB67606FB284BF14ED9F11D436F51CA@SA1PR11MB6760.namprd11.prod.outlook.com
Maintainers: Hyman Huang <yong.huang@smartx.com>
There is a newer version of this series
softmmu/dirtylimit.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
[PATCH] softmmu: Fix dirtylimit memory leak
Posted by alloc.young@outlook.com 2 years, 5 months ago 
From: "alloc.young" <alloc.young@outlook.com>

Fix memory leak in hmp_info_vcpu_dirty_limit,use g_autoptr
handle memory deallocation, alse use g_free to match g_malloc
&& g_new functions.

Signed-off-by: alloc.young <alloc.young@outlook.com>
---
 softmmu/dirtylimit.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c
index 3c275ee55b..fa959d7743 100644
--- a/softmmu/dirtylimit.c
+++ b/softmmu/dirtylimit.c
@@ -100,7 +100,7 @@ static void vcpu_dirty_rate_stat_collect(void)
             stat.rates[i].dirty_rate;
     }
 
-    free(stat.rates);
+    g_free(stat.rates);
 }
 
 static void *vcpu_dirty_rate_stat_thread(void *opaque)
@@ -171,10 +171,10 @@ void vcpu_dirty_rate_stat_initialize(void)
 
 void vcpu_dirty_rate_stat_finalize(void)
 {
-    free(vcpu_dirty_rate_stat->stat.rates);
+    g_free(vcpu_dirty_rate_stat->stat.rates);
     vcpu_dirty_rate_stat->stat.rates = NULL;
 
-    free(vcpu_dirty_rate_stat);
+    g_free(vcpu_dirty_rate_stat);
     vcpu_dirty_rate_stat = NULL;
 }
 
@@ -220,10 +220,10 @@ void dirtylimit_state_initialize(void)
 
 void dirtylimit_state_finalize(void)
 {
-    free(dirtylimit_state->states);
+    g_free(dirtylimit_state->states);
     dirtylimit_state->states = NULL;
 
-    free(dirtylimit_state);
+    g_free(dirtylimit_state);
     dirtylimit_state = NULL;
 
     trace_dirtylimit_state_finalize();
@@ -653,7 +653,8 @@ struct DirtyLimitInfoList *qmp_query_vcpu_dirty_limit(Error **errp)
 
 void hmp_info_vcpu_dirty_limit(Monitor *mon, const QDict *qdict)
 {
-    DirtyLimitInfoList *limit, *head, *info = NULL;
+    DirtyLimitInfoList *info;
+    g_autoptr(DirtyLimitInfoList) head = NULL;
     Error *err = NULL;
 
     if (!dirtylimit_in_service()) {
@@ -661,20 +662,17 @@ void hmp_info_vcpu_dirty_limit(Monitor *mon, const QDict *qdict)
         return;
     }
 
-    info = qmp_query_vcpu_dirty_limit(&err);
+    head = qmp_query_vcpu_dirty_limit(&err);
     if (err) {
         hmp_handle_error(mon, err);
         return;
     }
 
-    head = info;
-    for (limit = head; limit != NULL; limit = limit->next) {
+    for (info = head; info != NULL; info = info->next) {
         monitor_printf(mon, "vcpu[%"PRIi64"], limit rate %"PRIi64 " (MB/s),"
                             " current rate %"PRIi64 " (MB/s)\n",
-                            limit->value->cpu_index,
-                            limit->value->limit_rate,
-                            limit->value->current_rate);
+                            info->value->cpu_index,
+                            info->value->limit_rate,
+                            info->value->current_rate);
     }
-
-    g_free(info);
 }
-- 
2.39.3
Re: [PATCH] softmmu: Fix dirtylimit memory leak
Posted by Michael Tokarev 2 years, 5 months ago 
23.08.2023 10:47, alloc.young@outlook.com wrote:
> From: "alloc.young" <alloc.young@outlook.com>
> 
> Fix memory leak in hmp_info_vcpu_dirty_limit,use g_autoptr
> handle memory deallocation, alse use g_free to match g_malloc
> && g_new functions.

"..use g_autoptr TO handle.." ("to" is missing).
"alse" - I guess should be "Also".

I think it is better to split this into two parts, one fixing
the memleak and another converting to g_free().

/mjt
Re: [PATCH] softmmu: Fix dirtylimit memory leak
Posted by alloc young 2 years, 5 months ago 
On 2023/8/24 13:16, Michael Tokarev wrote:
> 23.08.2023 10:47, alloc.young@outlook.com wrote:
>> From: "alloc.young" <alloc.young@outlook.com>
>>
>> Fix memory leak in hmp_info_vcpu_dirty_limit,use g_autoptr
>> handle memory deallocation, alse use g_free to match g_malloc
>> && g_new functions.
>
> "..use g_autoptr TO handle.." ("to" is missing).
> "alse" - I guess should be "Also".
>
I'll fix these typos in next patch.

> I think it is better to split this into two parts, one fixing
> the memleak and another converting to g_free().

Ok, I'll make another patch, Thx.

>
>
> /mjt
Re: [PATCH] softmmu: Fix dirtylimit memory leak
Posted by Yong Huang 2 years, 5 months ago 
On Wed, Aug 23, 2023 at 3:48 PM <alloc.young@outlook.com> wrote:

> From: "alloc.young" <alloc.young@outlook.com>
>
> Fix memory leak in hmp_info_vcpu_dirty_limit,use g_autoptr
> handle memory deallocation, alse use g_free to match g_malloc
> && g_new functions.
>
> Signed-off-by: alloc.young <alloc.young@outlook.com>
> ---
>  softmmu/dirtylimit.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)
>
> [...]

> diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c
> index 3c275ee55b..fa959d7743 100644
> --- a/softmmu/dirtylimit.c
> +++ b/softmmu/dirtylimit.c
> @@ -100,7 +100,7 @@ static void vcpu_dirty_rate_stat_collect(void)
>              stat.rates[i].dirty_rate;
>      }
>
> -    free(stat.rates);
> +    g_free(stat.rates);
>  }
>
> Code optimization.

>  static void *vcpu_dirty_rate_stat_thread(void *opaque)
> @@ -171,10 +171,10 @@ void vcpu_dirty_rate_stat_initialize(void)
>
>  void vcpu_dirty_rate_stat_finalize(void)
>  {
> -    free(vcpu_dirty_rate_stat->stat.rates);
> +    g_free(vcpu_dirty_rate_stat->stat.rates);
>      vcpu_dirty_rate_stat->stat.rates = NULL;
>
> -    free(vcpu_dirty_rate_stat);
> +    g_free(vcpu_dirty_rate_stat);
>      vcpu_dirty_rate_stat = NULL;
>  }
>
> Likewise...

> @@ -220,10 +220,10 @@ void dirtylimit_state_initialize(void)
>
>  void dirtylimit_state_finalize(void)
>  {
> -    free(dirtylimit_state->states);
> +    g_free(dirtylimit_state->states);
>      dirtylimit_state->states = NULL;
>
> -    free(dirtylimit_state);
> +    g_free(dirtylimit_state);
>      dirtylimit_state = NULL;
>
> Likewise...

>      trace_dirtylimit_state_finalize();
> @@ -653,7 +653,8 @@ struct DirtyLimitInfoList
> *qmp_query_vcpu_dirty_limit(Error **errp)
>
>  void hmp_info_vcpu_dirty_limit(Monitor *mon, const QDict *qdict)
>  {
> -    DirtyLimitInfoList *limit, *head, *info = NULL;
> +    DirtyLimitInfoList *info;
> +    g_autoptr(DirtyLimitInfoList) head = NULL;
>      Error *err = NULL;
>
>      if (!dirtylimit_in_service()) {
> @@ -661,20 +662,17 @@ void hmp_info_vcpu_dirty_limit(Monitor *mon, const
> QDict *qdict)
>          return;
>      }
>
> -    info = qmp_query_vcpu_dirty_limit(&err);
> +    head = qmp_query_vcpu_dirty_limit(&err);
>      if (err) {
>          hmp_handle_error(mon, err);
>          return;
>      }
>
> -    head = info;
> -    for (limit = head; limit != NULL; limit = limit->next) {
> +    for (info = head; info != NULL; info = info->next) {
>          monitor_printf(mon, "vcpu[%"PRIi64"], limit rate %"PRIi64 "
> (MB/s),"
>                              " current rate %"PRIi64 " (MB/s)\n",
> -                            limit->value->cpu_index,
> -                            limit->value->limit_rate,
> -                            limit->value->current_rate);
> +                            info->value->cpu_index,
> +                            info->value->limit_rate,
> +                            info->value->current_rate);
>      }
> -
> -    g_free(info);
>
Fix memory leak.

>  }
> --
> 2.39.3
>
> I'll choose the memory leak modifications to keep the patch focused on a
single
independent issue.

Anyway,

Reviewed-by: Hyman Huang(黄勇) <yong.huang@smartx.com>

-- 
Best regards
回复: [PATCH] softmmu: Fix dirtylimit memory leak
Posted by 阳 春光 2 years, 5 months ago 


________________________________________
发件人: Yong Huang <yong.huang@smartx.com>
发送时间: 2023年8月24日 8:31
收件人: alloc.young@outlook.com
抄送: qemu-devel@nongnu.org
主题: Re: [PATCH] softmmu: Fix dirtylimit memory leak



On Wed, Aug 23, 2023 at 3:48 PM <alloc.young@outlook.com<mailto:alloc.young@outlook.com>> wrote:
From: "alloc.young" <alloc.young@outlook.com<mailto:alloc.young@outlook.com>>

Fix memory leak in hmp_info_vcpu_dirty_limit,use g_autoptr
handle memory deallocation, alse use g_free to match g_malloc
&& g_new functions.

Signed-off-by: alloc.young <alloc.young@outlook.com<mailto:alloc.young@outlook.com>>
---
 softmmu/dirtylimit.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

[...]
diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c
index 3c275ee55b..fa959d7743 100644
--- a/softmmu/dirtylimit.c
+++ b/softmmu/dirtylimit.c
@@ -100,7 +100,7 @@ static void vcpu_dirty_rate_stat_collect(void)
             stat.rates[i].dirty_rate;
     }

-    free(stat.rates);
+    g_free(stat.rates);
 }

Code optimization.
 static void *vcpu_dirty_rate_stat_thread(void *opaque)
@@ -171,10 +171,10 @@ void vcpu_dirty_rate_stat_initialize(void)

 void vcpu_dirty_rate_stat_finalize(void)
 {
-    free(vcpu_dirty_rate_stat->stat.rates);
+    g_free(vcpu_dirty_rate_stat->stat.rates);
     vcpu_dirty_rate_stat->stat.rates = NULL;

-    free(vcpu_dirty_rate_stat);
+    g_free(vcpu_dirty_rate_stat);
     vcpu_dirty_rate_stat = NULL;
 }

Likewise...
@@ -220,10 +220,10 @@ void dirtylimit_state_initialize(void)

 void dirtylimit_state_finalize(void)
 {
-    free(dirtylimit_state->states);
+    g_free(dirtylimit_state->states);
     dirtylimit_state->states = NULL;

-    free(dirtylimit_state);
+    g_free(dirtylimit_state);
     dirtylimit_state = NULL;

Likewise...
     trace_dirtylimit_state_finalize();
@@ -653,7 +653,8 @@ struct DirtyLimitInfoList *qmp_query_vcpu_dirty_limit(Error **errp)

 void hmp_info_vcpu_dirty_limit(Monitor *mon, const QDict *qdict)
 {
-    DirtyLimitInfoList *limit, *head, *info = NULL;
+    DirtyLimitInfoList *info;
+    g_autoptr(DirtyLimitInfoList) head = NULL;
     Error *err = NULL;

     if (!dirtylimit_in_service()) {
@@ -661,20 +662,17 @@ void hmp_info_vcpu_dirty_limit(Monitor *mon, const QDict *qdict)
         return;
     }

-    info = qmp_query_vcpu_dirty_limit(&err);
+    head = qmp_query_vcpu_dirty_limit(&err);
     if (err) {
         hmp_handle_error(mon, err);
         return;
     }

-    head = info;
-    for (limit = head; limit != NULL; limit = limit->next) {
+    for (info = head; info != NULL; info = info->next) {
         monitor_printf(mon, "vcpu[%"PRIi64"], limit rate %"PRIi64 " (MB/s),"
                             " current rate %"PRIi64 " (MB/s)\n",
-                            limit->value->cpu_index,
-                            limit->value->limit_rate,
-                            limit->value->current_rate);
+                            info->value->cpu_index,
+                            info->value->limit_rate,
+                            info->value->current_rate);
     }
-
-    g_free(info);
Fix memory leak.
 }
--
2.39.3

I'll choose the memory leak modifications to keep the patch focused on a single
independent issue.

Ok, will send a patch just to fix this issue, thx

Anyway,

Reviewed-by: Hyman Huang(黄勇) <yong.huang@smartx.com<mailto:yong.huang@smartx.com>>

--
Best regards

Patchew 2.1-devel-b67e4c2

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