Messages in this thread | | | Date | Thu, 5 Sep 2019 14:17:10 -0700 | From | Kees Cook <> | Subject | Re: [PATCH 2/9] thunderbolt: show key using %*s not %*pE |
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On Thu, Sep 05, 2019 at 03:44:26PM -0400, J. Bruce Fields wrote: > From: "J. Bruce Fields" <bfields@redhat.com> > > %*pEp (without "h" or "o") is a no-op. This string could contain > arbitrary (non-NULL) characters, so we do want escaping. Use %*pE like > every other caller.
Agreed on all counts. pEp is actively resulting in NO escaping, which is a bug here.
Acked-by: Kees Cook <keescook@chromium.org>
-Kees
> > Signed-off-by: J. Bruce Fields <bfields@redhat.com> > --- > drivers/thunderbolt/xdomain.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c > index 5118d46702d5..4e17a7c7bf0a 100644 > --- a/drivers/thunderbolt/xdomain.c > +++ b/drivers/thunderbolt/xdomain.c > @@ -636,7 +636,7 @@ static ssize_t key_show(struct device *dev, struct device_attribute *attr, > * It should be null terminated but anything else is pretty much > * allowed. > */ > - return sprintf(buf, "%*pEp\n", (int)strlen(svc->key), svc->key); > + return sprintf(buf, "%*pE\n", (int)strlen(svc->key), svc->key); > } > static DEVICE_ATTR_RO(key); > > -- > 2.21.0 >
-- Kees Cook
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