[PATCH] firmware: imx: sm-misc: Add NULL check for kmalloc in syslog_show

[Frank Li]

On Tue, Jun 09, 2026 at 08:45:04AM +0800, Li Jun wrote:
>
> Add a proper NULL check for the kmalloc() return value in syslog_show().
> If memory allocation fails, syslog would be NULL and passing it to
> misc_syslog() could lead to a NULL pointer dereference.
>
> Signed-off-by: Li Jun <lijun01 at kylinos.cn>
> ---

Add a fix tags

Frank

>  drivers/firmware/imx/sm-misc.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/firmware/imx/sm-misc.c b/drivers/firmware/imx/sm-misc.c
> index ac9af824c2d4..fb8d7bdb5b08 100644
> --- a/drivers/firmware/imx/sm-misc.c
> +++ b/drivers/firmware/imx/sm-misc.c
> @@ -79,6 +79,9 @@ static int syslog_show(struct seq_file *file, void *priv)
>         u16 size = SZ_4K / 4;
>         int ret;
>
> +       if (!syslog)
> +               return -ENOMEM;
> +
>         if (!ph)
>                 return -ENODEV;
>
> --
> 2.25.1
>
>