Re: [PATCH] target/ppc/kvm: Skip ".." directory in kvmppc_find_cpu_dt

[Daniel Henrique Barboza]

On 7/11/22 16:37, Murilo Opsfelder Araujo wrote:
> Some systems have /proc/device-tree/cpus/../clock-frequency. However,
> this is not the expected path for a CPU device tree directory.
>
> Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
> Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
> ---

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>

>   target/ppc/kvm.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index 6eed466f80..c8485a5cc0 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -1877,6 +1877,12 @@ static int kvmppc_find_cpu_dt(char *buf, int buf_len)
>       buf[0] = '\0';
>       while ((dirp = readdir(dp)) != NULL) {
>           FILE *f;
> +
> +        /* Don't accidentally read from the upper directory */
> +        if (strcmp(dirp->d_name, "..") == 0) {
> +            continue;
> +        }
> +
>           snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU,
>                    dirp->d_name);
>           f = fopen(buf, "r");