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

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Date:	Mon, 09 Dec 2013 18:16:04 -0600
From:	Mike Christie <michaelc@...wisc.edu>
To:	Ethan Zhao <ethan.kernel@...il.com>
CC:	konrad.wilk@...cle.com, pjones@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [SCSI] iscsi_boot_sysfs: Fix a memory leak in iscsi_boot_destroy_kset()

On 12/09/2013 03:37 AM, 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().
> 
> 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);

Thanks. Patch looks ok.

It is probably best to just kill the iscsi_boot_kset use and use the
kset directly. To do that, we would need to make kset's list a klist and
add some iterators then modify iscsi_boot_sysfs.c and iscsi_ibft.c to
use them instead of using the iscsi_boot_kset->kobj_list. I will work on
a patch to do this. But for now your patch is ok.

Reviewed-by: Mike Christie <michaelc@...wisc.edu>

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