This is a note to let you know that I've just added the patch titled
wifi: mwifiex: fix memory leak in mwifiex_histogram_read()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mwifiex-fix-memory-leak-in-mwifiex_histogram_re.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 814ba393890298e490b615bac6dcfc6cf3f7b6ad
Author: Dmitry Antipov <dmantipov@xxxxxxxxx>
Date: Wed Aug 2 19:07:15 2023 +0300
wifi: mwifiex: fix memory leak in mwifiex_histogram_read()
[ Upstream commit 9c8fd72a5c2a031cbc680a2990107ecd958ffcdb ]
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>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230802160726.85545-1-dmantipov@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c
index 8ab114cf3467f..e4cb7ce1c8b85 100644
--- a/drivers/net/wireless/marvell/mwifiex/debugfs.c
+++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c
@@ -265,8 +265,11 @@ 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"
@@ -321,6 +324,8 @@ 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;
}
