diff mbox series

[v2] wifi: mwifiex: fix memory leak in mwifiex_histogram_read()

Message ID 20230713044434.12494-1-dmantipov@yandex.ru (mailing list archive)
State Superseded
Delegated to: Kalle Valo
Headers show
Series [v2] wifi: mwifiex: fix memory leak in mwifiex_histogram_read() | expand

Commit Message

Dmitry Antipov July 13, 2023, 4:43 a.m. UTC 
Always free the zeroed page on return from mwifiex_histogram_read().

Fixes: cbf6e05527a76 ("mwifiex: add rx histogram statistics support")
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
---
v2: add Fixes: reference (Jakub Kicinski)
---
 drivers/net/wireless/marvell/mwifiex/debugfs.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c
index 52b18f4a774b..0cdd6c50c1c0 100644
--- a/drivers/net/wireless/marvell/mwifiex/debugfs.c
+++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c
@@ -253,8 +253,11 @@  mwifiex_histogram_read(struct file *file, char __user *ubuf,
 	if (!p)
 		return -ENOMEM;
 
-	if (!priv || !priv->hist_data)
-		return -EFAULT;
+	if (!priv || !priv->hist_data) {
+		ret = -EFAULT;
+		goto free_and_exit;
+	}
+
 	phist_data = priv->hist_data;
 
 	p += sprintf(p, "\n"
@@ -309,6 +312,8 @@  mwifiex_histogram_read(struct file *file, char __user *ubuf,
 	ret = simple_read_from_buffer(ubuf, count, ppos, (char *)page,
 				      (unsigned long)p - page);
 
+free_and_exit:
+	free_page(page);
 	return ret;
 }