[PATCH] char: cs5535_gpio: check put_user() result
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From: Kulikov Vasiliy on 29 Jul 2010 12:00 put_user() may fail, if so return -EFAULT. Signed-off-by: Kulikov Vasiliy <segooon(a)gmail.com> --- drivers/char/cs5535_gpio.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/char/cs5535_gpio.c b/drivers/char/cs5535_gpio.c index 4d830dc..fb7b888 100644 --- a/drivers/char/cs5535_gpio.c +++ b/drivers/char/cs5535_gpio.c @@ -146,7 +146,8 @@ static ssize_t cs5535_gpio_read(struct file *file, char __user *buf, /* add a line-feed if there is room */ if ((i == ARRAY_SIZE(rm)) && (count < len)) { - put_user('\n', buf + count); + if (put_user('\n', buf + count)) + return -EFAULT; count++; } -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |