Re: [PATCH v2] clk: eyeq: fix memory leak in eqc_auxdev_create() error path

[Brian Masney <bmasney@redhat.com>]

Hi Guangshuo,

On Sun, Apr 12, 2026 at 08:42:46PM +0800, Guangshuo Li wrote:
> eqc_auxdev_create() allocates an auxiliary_device with kzalloc() before
> calling auxiliary_device_init().
> 
> When auxiliary_device_init() returns an error, the function exits
> without freeing adev. Since the release callback is only expected to
> handle cleanup after successful initialization, adev should be freed
> explicitly in this path.
> 
> Add the missing kfree(adev) before returning from the
> auxiliary_device_init() error path.
> 
> Fixes: 25d904946a0b ("clk: eyeq: add driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> ---
>  drivers/clk/clk-eyeq.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/clk-eyeq.c b/drivers/clk/clk-eyeq.c
> index ea1c3d78e7cd..a48ecec4c9a5 100644
> --- a/drivers/clk/clk-eyeq.c
> +++ b/drivers/clk/clk-eyeq.c
> @@ -346,8 +346,10 @@ static int eqc_auxdev_create(struct device *dev, void __iomem *base,
>  	adev->id = id;
>  
>  	ret = auxiliary_device_init(adev);
> -	if (ret)
> +	if (ret) {
> +		kfree(adev);
>  		return ret;
> +	}
>  
>  	ret = auxiliary_device_add(adev);
>  	if (ret)

There is a leak in the error path here as well. I think this code
should be converted to devm_kzalloc().

There is no devm_kzalloc_obj() yet, however according to [1] that should
be coming soon.

[1] https://lore.kernel.org/lkml/20260330154108.GA3389518@killaraus.ideasonboard.com/

Brian