On Tue, 2013-12-17 at 10:27 -0800, Kees Cook wrote:
> This makes sure format strings cannot leak into the printk call via the
> constructed buffer.
[]
> diff --git a/drivers/scsi/esas2r/esas2r_log.c b/drivers/scsi/esas2r/esas2r_log.c
[]
> @@ -171,7 +171,7 @@ static int esas2r_log_master(const long level,
> if (strlen(event_buffer) < buflen)
> strcat(buffer, "\n");
>
> - printk(event_buffer);
> + printk("%s", event_buffer);
It's probably better to remove the
if (strlen(event_buffer) < buflen)
strcat(buffer, "\n");
and use
printk("%s\n", event_buffer);
so that the output is always newline terminated.
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