This function makes the static checkers grumble. The return value of
snprintf() is the number of bytes which would have been copied if
there was enough space. In theory, a %u can take take 10 digits so
len could be larger than 16 and it would be a small information
leak.
We may as well make the buffer larger as well since that is very
easy to do.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c
index 9eff0d0..e632008 100644
--- a/drivers/net/wireless/ath/ath6kl/debug.c
+++ b/drivers/net/wireless/ath/ath6kl/debug.c
@@ -1551,11 +1551,12 @@ static ssize_t ath6kl_listen_int_read(struct file *file,
size_t count, loff_t *ppos)
{
struct ath6kl *ar = file->private_data;
- char buf[16];
+ char buf[32];
int len;
len = snprintf(buf, sizeof(buf), "%u %u\n", ar->listen_intvl_t,
ar->listen_intvl_b);
+ len = min(sizeof(buf), len);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
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