Always free the zeroed page on return from 'mwifiex_histogram_read()'.
Fixes: cbf6e05527a7 ("mwifiex: add rx histogram statistics support")
Acked-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
---
v3: add Acked-by: and reorder series
---
drivers/net/wireless/marvell/mwifiex/debugfs.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
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;
}
--
2.41.0
