From: Takashi Iwai <tiwai@suse.de>
To: Sebastian Reichel <sre@kernel.org>
Cc: linux-pm@vger.kernel.org
Subject: [PATCH] power: twl4030: Use scnprintf() for avoiding potential buffer overflow
Date: Wed, 11 Mar 2020 10:08:18 +0100 [thread overview]
Message-ID: <20200311090818.20797-1-tiwai@suse.de> (raw)
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>
---
drivers/power/supply/twl4030_charger.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index 648ab80288c9..1bc49b2e12e8 100644
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -726,10 +726,10 @@ twl4030_bci_mode_show(struct device *dev,
for (i = 0; i < ARRAY_SIZE(modes); i++)
if (mode == i)
- len += snprintf(buf+len, PAGE_SIZE-len,
+ len += scnprintf(buf+len, PAGE_SIZE-len,
"[%s] ", modes[i]);
else
- len += snprintf(buf+len, PAGE_SIZE-len,
+ len += scnprintf(buf+len, PAGE_SIZE-len,
"%s ", modes[i]);
buf[len-1] = '\n';
return len;
--
2.16.4
next reply other threads:[~2020-03-11 9:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-11 9:08 Takashi Iwai [this message]
2020-03-11 22:23 ` [PATCH] power: twl4030: Use scnprintf() for avoiding potential buffer overflow Sebastian Reichel
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