On Tuesday, January 05, 2016 04:15:54 PM Viresh Kumar wrote:

sprintf() can access memory outside of the range of the character array, and is risky in some situations. The driver specified prop_name string can be longer than NAME_MAX here (only an attacker will do that though) and so blindly copying it into the character array of size NAME_MAX isn't safe. Instead we must use snprintf() here.

Reported-by: Geert Uytterhoeven geert@linux-m68k.org Signed-off-by: Viresh Kumar viresh.kumar@linaro.org

Applied, thanks!

---

drivers/base/power/opp/core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index cd230c63aee6..cf351d3dab1c 100644 --- a/drivers/base/power/opp/core.c +++ b/drivers/base/power/opp/core.c @@ -808,7 +808,8 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, /* Search for "opp-microvolt-<name>" */ if (dev_opp->prop_name) {

• sprintf(name, "opp-microvolt-%s", dev_opp->prop_name);
  

• snprintf(name, sizeof(name), "opp-microvolt-%s",
  

• 	 dev_opp->prop_name);
  

  prop = of_find_property(opp->np, name, NULL); }

@@ -849,7 +850,8 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, /* Search for "opp-microamp-<name>" */ prop = NULL; if (dev_opp->prop_name) {

• sprintf(name, "opp-microamp-%s", dev_opp->prop_name);
  

• snprintf(name, sizeof(name), "opp-microamp-%s",
  

• 	 dev_opp->prop_name);
  

  prop = of_find_property(opp->np, name, NULL); }