diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2016-01-05 16:15:54 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2016-04-01 10:53:01 +0530 |
| commit | daaddade44fd0827911769675040a381a609b52f (patch) | |
| tree | d2471e25221f26e6454df279a34e621acc1a7798 | |
| parent | 072172d51c603570bf9616f0bbc9e7942af659c9 (diff) | |
PM / OPP: Use snprintf() instead of sprintf()
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>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/power/opp/core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index 4e08057fdbce..c03c59089ae8 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); } |