devm_kasprintf() returns NULL when memory allocation fails. Currently,
tps6594_pfsm_probe() does not check for this case, which results in a
NULL pointer dereference.

Add NULL check after devm_kasprintf() to prevent this issue.

Fixes: a0df3ef087f8 ("misc: tps6594-pfsm: Add driver for TI TPS6594 PFSM")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
---
 drivers/misc/tps6594-pfsm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/tps6594-pfsm.c b/drivers/misc/tps6594-pfsm.c
index 0a24ce44cc37..0d9dad20b6ae 100644
--- a/drivers/misc/tps6594-pfsm.c
+++ b/drivers/misc/tps6594-pfsm.c
@@ -281,6 +281,8 @@ static int tps6594_pfsm_probe(struct platform_device *pdev)
 	pfsm->miscdev.minor = MISC_DYNAMIC_MINOR;
 	pfsm->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "pfsm-%ld-0x%02x",
 					    tps->chip_id, tps->reg);
+	if (!pfsm->miscdev.name)
+		return -ENOMEM;
 	pfsm->miscdev.fops = &tps6594_pfsm_fops;
 	pfsm->miscdev.parent = dev->parent;
 	pfsm->chip_id = tps->chip_id;
-- 
2.34.1

On Tue, Apr 01, 2025 at 09:34:04PM +0800, Henry Martin wrote:
> devm_kasprintf() returns NULL when memory allocation fails. Currently,
> tps6594_pfsm_probe() does not check for this case, which results in a
> NULL pointer dereference.
> 
> Add NULL check after devm_kasprintf() to prevent this issue.
> 
> Fixes: a0df3ef087f8 ("misc: tps6594-pfsm: Add driver for TI TPS6594 PFSM")
> Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
> ---
>  drivers/misc/tps6594-pfsm.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/misc/tps6594-pfsm.c b/drivers/misc/tps6594-pfsm.c
> index 0a24ce44cc37..0d9dad20b6ae 100644
> --- a/drivers/misc/tps6594-pfsm.c
> +++ b/drivers/misc/tps6594-pfsm.c
> @@ -281,6 +281,8 @@ static int tps6594_pfsm_probe(struct platform_device *pdev)
>  	pfsm->miscdev.minor = MISC_DYNAMIC_MINOR;
>  	pfsm->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "pfsm-%ld-0x%02x",
>  					    tps->chip_id, tps->reg);
> +	if (!pfsm->miscdev.name)
> +		return -ENOMEM;
>  	pfsm->miscdev.fops = &tps6594_pfsm_fops;
>  	pfsm->miscdev.parent = dev->parent;
>  	pfsm->chip_id = tps->chip_id;
> -- 
> 2.34.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
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You are receiving this message because of the following common error(s)
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- You have marked a patch with a "Fixes:" tag for a commit that is in an
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If you wish to discuss this problem further, or you have questions about
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thanks,

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