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Re: [PATCH v7 3/7] xen/console: use memcpy() in conring_puts()
- To: dmukhin@xxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 16 Jul 2026 18:08:01 +0200
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- Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger.pau@xxxxxxxxxx, sstabellini@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 16 Jul 2026 16:08:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.07.2026 20:16, dmukhin@xxxxxxxx wrote:
> --- a/xen/drivers/char/console.c
> +++ b/xen/drivers/char/console.c
> @@ -360,12 +360,22 @@ static DECLARE_SOFTIRQ_TASKLET(conring_tasklet,
> conring_notify, NULL);
> /* NB: Do not send conring VIRQs during panic. */
> static bool conring_no_notify;
>
> -static void conring_puts(const char *str, size_t len)
> +static void conring_puts(const char *str, unsigned int len)
> {
> + unsigned int src = likely(len < conring_size) ? 0 : len - conring_size;
Isn't the attempt to handle strings longer than conring_size pretty much in
vain? Things look correct as far as the rest of the logic in the function
goes, but is this useful? It certainly warrants at least a brief comment imo.
Jan
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