[PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[miaoguanqin]

When we test mdadm with asan,we found some memory leaks.
We fix these memory leaks based on code logic. 

miaoguanqin (4):
  Fix memory leak in file Assemble
  Fix memory leak in file Kill
  Fix memory leak in file Manage
  Fix memory leak in file mdadm

 Assemble.c | 15 +++++++++++++--
 Kill.c     |  9 ++++++++-
 Manage.c   | 16 +++++++++++++++-
 mdadm.c    |  4 ++++
 4 files changed, 40 insertions(+), 4 deletions(-)

-- 
2.33.0

[PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[Guanqin Miao]

When we test mdadm with asan,i we found some memory leaks.
We fix these memory leaks based on code logic.

Guanqin Miao (4):
  Fix memory leak in file Assemble
  Fix memory leak in file Kill
  Fix memory leak in file Manage
  Fix memory leak in file mdadm

 Assemble.c | 15 +++++++++++++--
 Kill.c     |  9 ++++++++-
 Manage.c   | 15 ++++++++++++++-
 mdadm.c    |  4 ++++
 4 files changed, 39 insertions(+), 4 deletions(-)

-- 
2.33.0

[PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[Guanqin Miao]

When we test mdadm with asan,i we found some memory leaks.
We fix these memory leaks based on code logic.

Guanqin Miao (4):
  Fix memory leak in file Assemble
  Fix memory leak in file Kill
  Fix memory leak in file Manage
  Fix memory leak in file mdadm

 Assemble.c | 13 +++++++++++--
 Kill.c     |  9 ++++++++-
 Manage.c   | 11 ++++++++++-
 mdadm.c    |  4 ++++
 4 files changed, 33 insertions(+), 4 deletions(-)

-- 
2.33.0

[PATCH 1/4] Fix memory leak in file Assemble

[Guanqin Miao]

When we test mdadm with asan, we found some memory leaks in Assemble.c
We fix these memory leaks based on code logic.

Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
---
 Assemble.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Assemble.c b/Assemble.c
index 49804941..a49de183 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -341,8 +341,10 @@ static int select_devices(struct mddev_dev *devlist,
 				st->ss->free_super(st);
 			dev_policy_free(pol);
 			domain_free(domains);
-			if (tst)
+			if (tst) {
 				tst->ss->free_super(tst);
+				free(tst);
+			}
 			return -1;
 		}
 
@@ -417,6 +419,7 @@ static int select_devices(struct mddev_dev *devlist,
 				st->ss->free_super(st);
 				dev_policy_free(pol);
 				domain_free(domains);
+				free(st);
 				return -1;
 			}
 			if (c->verbose > 0)
@@ -425,6 +428,7 @@ static int select_devices(struct mddev_dev *devlist,
 
 			/* make sure we finished the loop */
 			tmpdev = NULL;
+			free(st);
 			goto loop;
 		} else {
 			content = *contentp;
@@ -533,6 +537,7 @@ static int select_devices(struct mddev_dev *devlist,
 				st->ss->free_super(st);
 				dev_policy_free(pol);
 				domain_free(domains);
+				free(tst);
 				return -1;
 			}
 			tmpdev->used = 1;
@@ -546,8 +551,10 @@ static int select_devices(struct mddev_dev *devlist,
 		}
 		dev_policy_free(pol);
 		pol = NULL;
-		if (tst)
+		if (tst) {
 			tst->ss->free_super(tst);
+			free(tst);
+		}
 	}
 
 	/* Check if we found some imsm spares but no members */
@@ -839,6 +846,7 @@ static int load_devices(struct devs *devices, char *devmap,
 				close(mdfd);
 				free(devices);
 				free(devmap);
+				free(best);
 				*stp = st;
 				return -1;
 			}
@@ -1950,6 +1958,7 @@ out:
 	} else if (mdfd >= 0)
 		close(mdfd);
 
+	free(best);
 	/* '2' means 'OK, but not started yet' */
 	if (rv == -1) {
 		free(devices);
-- 
2.33.0

[PATCH 2/4] Fix memory leak in file Kill

[Guanqin Miao]

When we test mdadm with asan, we found some memory leaks in Kill.c
We fix these memory leaks based on code logic.

Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
---
 Kill.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Kill.c b/Kill.c
index bfd0efdc..43c9abed 100644
--- a/Kill.c
+++ b/Kill.c
@@ -41,6 +41,7 @@ int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
 	 *  4 - failed to find a superblock.
 	 */
 
+	bool free_super = false;
 	int fd, rv = 0;
 
 	if (force)
@@ -52,8 +53,10 @@ int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
 				dev);
 		return 2;
 	}
-	if (st == NULL)
+	if (st == NULL) {
 		st = guess_super(fd);
+		free_super = true;
+	}
 	if (st == NULL || st->ss->init_super == NULL) {
 		if (verbose >= 0)
 			pr_err("Unrecognised md component device - %s\n", dev);
@@ -77,6 +80,10 @@ int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl)
 			rv = 0;
 		}
 	}
+	if (free_super && st) {
+		st->ss->free_super(st);
+		free(st);
+	}
 	close(fd);
 	return rv;
 }
-- 
2.33.0

[PATCH 3/4] Fix memory leak in file Manage

[Guanqin Miao]

When we test mdadm with asan, we found some memory leaks in Manage.c
We fix these memory leaks based on code logic.

Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
---
 Manage.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Manage.c b/Manage.c
index f54de7c6..7b6b2798 100644
--- a/Manage.c
+++ b/Manage.c
@@ -222,6 +222,7 @@ int Manage_stop(char *devname, int fd, int verbose, int will_retry)
 		if (verbose >= 0)
 			pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n",
 			       devname);
+		sysfs_free(mdi);
 		return 1;
 	}
 	/* If this is an mdmon managed array, just write 'inactive'
@@ -801,8 +802,14 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 						    rdev, update, devname,
 						    verbose, array);
 				dev_st->ss->free_super(dev_st);
-				if (rv)
+				if (rv) {
+					free(dev_st);
 					return rv;
+				}
+			}
+			if (dev_st) {
+				dev_st->ss->free_super(dev_st);
+				free(dev_st);
 			}
 		}
 		if (dv->disposition == 'M') {
@@ -1699,6 +1706,7 @@ int Manage_subdevs(char *devname, int fd,
 			break;
 		}
 	}
+	free(tst);
 	if (frozen > 0)
 		sysfs_set_str(&info, NULL, "sync_action","idle");
 	if (test && count == 0)
@@ -1706,6 +1714,7 @@ int Manage_subdevs(char *devname, int fd,
 	return 0;
 
 abort:
+	free(tst);
 	if (frozen > 0)
 		sysfs_set_str(&info, NULL, "sync_action","idle");
 	return !test && busy ? 2 : 1;
-- 
2.33.0

[PATCH 4/4] Fix memory leak in file mdadm

[Guanqin Miao]

When we test mdadm with asan, we found some memory leaks in mdadm.c
We fix these memory leaks based on code logic.

Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
---
 mdadm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mdadm.c b/mdadm.c
index 2296911d..409da62c 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1709,6 +1709,10 @@ int main(int argc, char *argv[])
 		autodetect();
 		break;
 	}
+	if (ss) {
+		ss->ss->free_super(ss);
+		free(ss);
+	}
 	if (locked)
 		cluster_release_dlmlock();
 	close_fd(&mdfd);
-- 
2.33.0

Re: [PATCH 1/4] Fix memory leak in file Assemble

[Mariusz Tkaczyk]

On Mon, 24 Apr 2023 16:06:34 +0800
Guanqin Miao <miaoguanqin@huawei.com> wrote:

> When we test mdadm with asan, we found some memory leaks in Assemble.c
> We fix these memory leaks based on code logic.
> 
> Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
> Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
> ---

Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>

Re: [PATCH 2/4] Fix memory leak in file Kill

[Mariusz Tkaczyk]

On Mon, 24 Apr 2023 16:06:35 +0800
Guanqin Miao <miaoguanqin@huawei.com> wrote:

> When we test mdadm with asan, we found some memory leaks in Kill.c
> We fix these memory leaks based on code logic.
> 
> Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
> Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
> ---
Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>

Re: [PATCH 3/4] Fix memory leak in file Manage

[Mariusz Tkaczyk]

On Mon, 24 Apr 2023 16:06:36 +0800
Guanqin Miao <miaoguanqin@huawei.com> wrote:

> When we test mdadm with asan, we found some memory leaks in Manage.c
> We fix these memory leaks based on code logic.
> 
> Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
> Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
> ---
Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>

Re: [PATCH 4/4] Fix memory leak in file mdadm

[Mariusz Tkaczyk]

On Mon, 24 Apr 2023 16:06:37 +0800
Guanqin Miao <miaoguanqin@huawei.com> wrote:

> When we test mdadm with asan, we found some memory leaks in mdadm.c
> We fix these memory leaks based on code logic.
> 
> Signed-off-by: Guanqin Miao <miaoguanqin@huawei.com>
> Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
> ---
Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>

Re: [PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[Jes Sorensen]

On 4/24/23 04:06, Guanqin Miao wrote:
> When we test mdadm with asan,i we found some memory leaks.
> We fix these memory leaks based on code logic.
> 
> Guanqin Miao (4):
>   Fix memory leak in file Assemble
>   Fix memory leak in file Kill
>   Fix memory leak in file Manage
>   Fix memory leak in file mdadm
> 
>  Assemble.c | 13 +++++++++++--
>  Kill.c     |  9 ++++++++-
>  Manage.c   | 11 ++++++++++-
>  mdadm.c    |  4 ++++
>  4 files changed, 33 insertions(+), 4 deletions(-)
> 

I applied this, modulo a fix to the Manage fix, where it would try to
call free(tst) in the abort path, before tst was initialized.

Thanks,
Jes

Re: [PATCH 0/4] Fix memory leak for Manage Assemble Kill mdadm

[Jes Sorensen]

On 9/1/23 12:02, Jes Sorensen wrote:
> On 4/24/23 04:06, Guanqin Miao wrote:
>> When we test mdadm with asan,i we found some memory leaks.
>> We fix these memory leaks based on code logic.
>>
>> Guanqin Miao (4):
>>   Fix memory leak in file Assemble
>>   Fix memory leak in file Kill
>>   Fix memory leak in file Manage
>>   Fix memory leak in file mdadm
>>
>>  Assemble.c | 13 +++++++++++--
>>  Kill.c     |  9 ++++++++-
>>  Manage.c   | 11 ++++++++++-
>>  mdadm.c    |  4 ++++
>>  4 files changed, 33 insertions(+), 4 deletions(-)
>>
> 
> I applied this, modulo a fix to the Manage fix, where it would try to
> call free(tst) in the abort path, before tst was initialized.

Oh and a fix to Assemble where free(st) would goto loop and then
dereference st.

Jes