linux-kernel - Re: [PATCH] [SCSI] iscsi_boot_sysfs: Fix a memory leak in iscsi_boot_destroy

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Message-ID: <CABawtvMGOJg5DPRwdWAOSTkxgurv5bx8n=3yJFOq=aagxzseZQ@mail.gmail.com>
Date:	Tue, 10 Dec 2013 14:03:51 +0800
From:	Ethan Zhao <ethan.kernel@...il.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	michaelc@...wisc.edu, pjones@...hat.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [SCSI] iscsi_boot_sysfs: Fix a memory leak in iscsi_boot_destroy_kset()

Konrad,

 boot_kset was allocated when module loaded by
ibft_init()
  iscsi_boot_create_kset()
     kzalloc()

but wasn't freed when module unloaded by
ibft_exit()
   ibft_cleanup()
     iscsi_boot_destroy_kset()

Thanks,
Ethan

On Tue, Dec 10, 2013 at 5:30 AM, Konrad Rzeszutek Wilk
<konrad.wilk@...cle.com> wrote:
> On Mon, Dec 09, 2013 at 05:37:11PM +0800, Ethan Zhao wrote:
>> From: "Ethan Zhao" <ethan.kernel@...il.com>
>>
>> Load and unload iscsi_ibft module will cause kernel memory leak, fix it
>> in scsi/iscsi_boot_sysfs.c iscsi_boot_destroy_kset().
>>
>
> Is there a stack trace?
>> Signed-off-by: Ethan Zhao <ethan.kernel@...il.com>
>> ---
>>  drivers/scsi/iscsi_boot_sysfs.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/scsi/iscsi_boot_sysfs.c b/drivers/scsi/iscsi_boot_sysfs.c
>> index 14c1c8f..680bf6f 100644
>> --- a/drivers/scsi/iscsi_boot_sysfs.c
>> +++ b/drivers/scsi/iscsi_boot_sysfs.c
>> @@ -490,5 +490,6 @@ void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)
>>               iscsi_boot_remove_kobj(boot_kobj);
>>
>>       kset_unregister(boot_kset->kset);
>> +     kfree(boot_kset);
>>  }
>>  EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset);
>> --
>> 1.8.3.4 (Apple Git-47)
>>
--
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