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wifi: mwifiex: fix memory leak in mwifiex_histogram_read()

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[ Upstream commit 9c8fd72a5c ]

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

Fixes: cbf6e05527 ("mwifiex: add rx histogram statistics support")

Acked-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230802160726.85545-1-dmantipov@yandex.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Antipov
2023-08-02 19:07:15 +03:00
committed by Greg Kroah-Hartman
parent ab4810042c
commit 8f717752f9
1 changed files with 7 additions and 2 deletions
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9
drivers/net/wireless/marvell/mwifiex/debugfs.c
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@ -265,8 +265,11 @@ mwifiex_histogram_read(struct file *file, char __user *ubuf,
if (!p) if (!p)
return -ENOMEM; return -ENOMEM;
if (!priv || !priv->hist_data) if (!priv || !priv->hist_data) {
return -EFAULT; ret = -EFAULT;
goto free_and_exit;
}
phist_data = priv->hist_data; phist_data = priv->hist_data;
p += sprintf(p, "\n" 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, ret = simple_read_from_buffer(ubuf, count, ppos, (char *)page,
(unsigned long)p - page); (unsigned long)p - page);
free_and_exit:
free_page(page);
return ret; return ret;
} }