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rtw88: debug: Fix uninitialized memory in debugfs code 

commit 74a8c816fa upstream.

This code does not ensure that the whole buffer is initialized and none
of the callers check for errors so potentially none of the buffer is
initialized.  Add a memset to eliminate this bug.

Fixes: e3037485c6 ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/X8ilOfVz3pf0T5ec@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Dan Carpenter 2020-12-03 11:43:37 +03:00 committed by Greg Kroah-Hartman
parent af699e99ef
commit 1015eefe10
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/realtek/rtw88/debug.c
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@ -146,6 +146,8 @@ static int rtw_debugfs_copy_from_user(char tmp[], int size,
{
int tmp_len;
memset(tmp, 0, size);
if (count < num)
return -EFAULT;