diff options
| author | Takashi Iwai <tiwai@suse.de> | 2020-03-11 12:06:44 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-03-27 13:30:24 +0300 |
| commit | 7eb42f9855909cc10f5ba809c500ac0032fd60b8 (patch) | |
| tree | 69d43a7e710d065ccac00031ff7fd78259326dc9 /drivers/pinctrl/mediatek | |
| parent | 492464cd464da92242b9e9fc5aec879033bc3df6 (diff) | |
| download | linux-7eb42f9855909cc10f5ba809c500ac0032fd60b8.tar.xz | |
pinctrl: mediatek: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200311090644.20287-1-tiwai@suse.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-paris.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 3ee8086f5e55..3853ec3a2a8e 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -611,7 +611,7 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) { pullen = 0; } - len += snprintf(buf + len, bufLen - len, + len += scnprintf(buf + len, bufLen - len, "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d", gpio, pinmux, @@ -625,10 +625,10 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, pullup); if (r1 != -1) { - len += snprintf(buf + len, bufLen - len, " (%1d %1d)\n", + len += scnprintf(buf + len, bufLen - len, " (%1d %1d)\n", r1, r0); } else { - len += snprintf(buf + len, bufLen - len, "\n"); + len += scnprintf(buf + len, bufLen - len, "\n"); } return len; |