| Message ID | 20200930174839.1308344-1-drew@beagleboard.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] pinctrl: single: fix pinctrl_spec.args_count bounds check | expand |
On Wed, Sep 30, 2020 at 7:51 PM Drew Fustini <drew@beagleboard.org> wrote: > The property #pinctrl-cells can either be 1 or 2: > > - if #pinctrl-cells = <1>, then pinctrl_spec.args_count = 2 > - if #pinctrl-cells = <2>, then pinctrl_spec.args_count = 3 > > All other values of pinctrl_spec.args_count are incorrect. This fix > checks the upper bound instead of just the lower bound. > > Fixes: a13395418888 ("pinctrl: single: parse #pinctrl-cells = 2") > Reported-by: Trent Piepho <tpiepho@gmail.com> > Link: https://lore.kernel.org/linux-omap/3139716.CMS8C0sQ7x@zen.local/ > Signed-off-by: Drew Fustini <drew@beagleboard.org> > --- > v2 change: > - correct the description as I had previously been mistakenly using the > term #pinctrl-cells instead of pinctrl_spec.args_count Patch applied! Yours, Linus Walleij
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index efe41abc5d47..5cbf0e55087c 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1014,7 +1014,7 @@ static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs, if (res) return res; - if (pinctrl_spec.args_count < 2) { + if (pinctrl_spec.args_count < 2 || pinctrl_spec.args_count > 3) { dev_err(pcs->dev, "invalid args_count for spec: %i\n", pinctrl_spec.args_count); break;
The property #pinctrl-cells can either be 1 or 2: - if #pinctrl-cells = <1>, then pinctrl_spec.args_count = 2 - if #pinctrl-cells = <2>, then pinctrl_spec.args_count = 3 All other values of pinctrl_spec.args_count are incorrect. This fix checks the upper bound instead of just the lower bound. Fixes: a13395418888 ("pinctrl: single: parse #pinctrl-cells = 2") Reported-by: Trent Piepho <tpiepho@gmail.com> Link: https://lore.kernel.org/linux-omap/3139716.CMS8C0sQ7x@zen.local/ Signed-off-by: Drew Fustini <drew@beagleboard.org> --- v2 change: - correct the description as I had previously been mistakenly using the term #pinctrl-cells instead of pinctrl_spec.args_count drivers/pinctrl/pinctrl-single.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)