[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <782a6f2d-84ae-3530-7e3c-07f31a4f303b@suse.de>
Date: Tue, 7 Mar 2023 11:43:46 +0300
From: Denis Kirjanov <dkirjanov@...e.de>
To: Dongliang Mu <dzm91@...t.edu.cn>,
Alexander Aring <alex.aring@...il.com>,
Stefan Schmidt <stefan@...enfreihafen.org>,
Miquel Raynal <miquel.raynal@...tlin.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: syzbot+bd85b31816913a32e473@...kaller.appspotmail.com,
linux-wpan@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ieee802154: fix a null pointer in
nl802154_trigger_scan
On 3/7/23 10:30, Dongliang Mu wrote:
> There is a null pointer dereference if NL802154_ATTR_SCAN_TYPE is
> not set by the user.
>
> Fix this by adding a null pointer check.
>
> Reported-and-tested-by: syzbot+bd85b31816913a32e473@...kaller.appspotmail.com
> Signed-off-by: Dongliang Mu <dzm91@...t.edu.cn>
Please add a Fixes: tag
> ---
> net/ieee802154/nl802154.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
> index 2215f576ee37..1cf00cffd63f 100644
> --- a/net/ieee802154/nl802154.c
> +++ b/net/ieee802154/nl802154.c
> @@ -1412,7 +1412,8 @@ static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info)
> return -EOPNOTSUPP;
> }
>
> - if (!nla_get_u8(info->attrs[NL802154_ATTR_SCAN_TYPE])) {
> + if (!info->attrs[NL802154_ATTR_SCAN_TYPE] ||
> + !nla_get_u8(info->attrs[NL802154_ATTR_SCAN_TYPE])) {
> NL_SET_ERR_MSG(info->extack, "Malformed request, missing scan type");
> return -EINVAL;
> }
Powered by blists - more mailing lists