From 9746010bd3c825d364b783b327990d25962657dd Mon Sep 17 00:00:00 2001 From: Dan Carpenter <error27@gmail.com> Date: Thu, 22 Jul 2010 10:50:28 +0200 Subject: [PATCH] ath9k: snprintf() returns largish values The snprintf() function returns the number of characters that would have been written (not counting the NUL character on the end). It could potentially be larger than the size of the buffer. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> --- drivers/net/wireless/ath/ath9k/htc_drv_main.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c index 32438771ca2b..cf9bcc67ade2 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c @@ -524,6 +524,9 @@ static ssize_t read_file_tgt_stats(struct file *file, char __user *user_buf, len += snprintf(buf + len, sizeof(buf) - len, "%19s : %10u\n", "TX Rate", priv->debug.txrate); + if (len > sizeof(buf)) + len = sizeof(buf); + return simple_read_from_buffer(user_buf, count, ppos, buf, len); } @@ -569,6 +572,9 @@ static ssize_t read_file_xmit(struct file *file, char __user *user_buf, "%20s : %10u\n", "VO queued", priv->debug.tx_stats.queue_stats[WME_AC_VO]); + if (len > sizeof(buf)) + len = sizeof(buf); + return simple_read_from_buffer(user_buf, count, ppos, buf, len); } @@ -595,6 +601,9 @@ static ssize_t read_file_recv(struct file *file, char __user *user_buf, "%20s : %10u\n", "SKBs Dropped", priv->debug.rx_stats.skb_dropped); + if (len > sizeof(buf)) + len = sizeof(buf); + return simple_read_from_buffer(user_buf, count, ppos, buf, len); } -- GitLab