diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2016-01-05 13:45:54 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-06 04:38:27 +0300 |
| commit | 5ff24d601092b222340b28466e263b1c4559407e (patch) | |
| tree | 13b6a6a3058ec97b126cbbf230fdd25ca42097f1 /drivers | |
| parent | d9de19b1cc013433ad293365b5b3902ec73dfd60 (diff) | |
| download | linux-5ff24d601092b222340b28466e263b1c4559407e.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -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 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); } |