linux-kernel - Re: [PATCH] misc: keba: Fix sysfs group creation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <6630b70a-2383-46ad-b9e2-42454a537bad@engleder-embedded.com>
Date: Tue, 27 Aug 2024 20:27:21 +0200
From: Gerhard Engleder <gerhard@...leder-embedded.com>
To: linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Cc: arnd@...db.de, Gerhard Engleder <eg@...a.com>
Subject: Re: [PATCH] misc: keba: Fix sysfs group creation

On 19.08.24 21:26, Gerhard Engleder wrote:
> From: Gerhard Engleder <eg@...a.com>
> 
> sysfs_create_group() races with userspace. Use dev_groups instead which
> prevents all the problems of sysfs_create_group().
> 
> Fixes: a1944676767e ("misc: keba: Add basic KEBA CP500 system FPGA support")
> Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Gerhard Engleder <eg@...a.com>
> ---
>   drivers/misc/keba/cp500.c | 14 ++++----------
>   1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/misc/keba/cp500.c b/drivers/misc/keba/cp500.c
> index 9ba46f0f9392..ae0922817881 100644
> --- a/drivers/misc/keba/cp500.c
> +++ b/drivers/misc/keba/cp500.c
> @@ -212,12 +212,12 @@ static ssize_t keep_cfg_store(struct device *dev, struct device_attribute *attr,
>   }
>   static DEVICE_ATTR_RW(keep_cfg);
>   
> -static struct attribute *attrs[] = {
> +static struct attribute *cp500_attrs[] = {
>   	&dev_attr_version.attr,
>   	&dev_attr_keep_cfg.attr,
>   	NULL
>   };
> -static const struct attribute_group attrs_group = { .attrs = attrs };
> +ATTRIBUTE_GROUPS(cp500);
>   
>   static void cp500_i2c_release(struct device *dev)
>   {
> @@ -396,20 +396,15 @@ static int cp500_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
>   
>   	pci_set_drvdata(pci_dev, cp500);
>   
> -	ret = sysfs_create_group(&pci_dev->dev.kobj, &attrs_group);
> -	if (ret != 0)
> -		goto out_free_irq;
>   
>   	ret = cp500_enable(cp500);
>   	if (ret != 0)
> -		goto out_remove_group;
> +		goto out_free_irq;
>   
>   	cp500_register_auxiliary_devs(cp500);
>   
>   	return 0;
>   
> -out_remove_group:
> -	sysfs_remove_group(&pci_dev->dev.kobj, &attrs_group);
>   out_free_irq:
>   	pci_free_irq_vectors(pci_dev);
>   out_disable:
> @@ -427,8 +422,6 @@ static void cp500_remove(struct pci_dev *pci_dev)
>   
>   	cp500_disable(cp500);
>   
> -	sysfs_remove_group(&pci_dev->dev.kobj, &attrs_group);
> -
>   	pci_set_drvdata(pci_dev, 0);
>   
>   	pci_free_irq_vectors(pci_dev);
> @@ -450,6 +443,7 @@ static struct pci_driver cp500_driver = {
>   	.id_table = cp500_ids,
>   	.probe = cp500_probe,
>   	.remove = cp500_remove,
> +	.dev_groups = cp500_groups,
>   };
>   module_pci_driver(cp500_driver);
>   

Hello Greg,

did I made some mistakes that keeps this patch from being merged?
I think it can be included to 6.11-rc6, but maybe I'm wrong.

Thanks,
Gerhard