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Commit 8f717752 authored by Dmitry Antipov's avatar Dmitry Antipov Committed by Greg Kroah-Hartman
Browse files

wifi: mwifiex: fix memory leak in mwifiex_histogram_read() 



[ Upstream commit 9c8fd72a5c2a031cbc680a2990107ecd958ffcdb ]

Always free the zeroed page on return from 'mwifiex_histogram_read()'.

Fixes: cbf6e055 ("mwifiex: add rx histogram statistics support")

Acked-by: default avatarBrian Norris <briannorris@chromium.org>
Signed-off-by: default avatarDmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: default avatarKalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230802160726.85545-1-dmantipov@yandex.ru


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent ab481004

drivers/net/wireless/marvell/mwifiex/debugfs.c

+7 −2
Original line number Diff line number Diff line
@@ -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;

}