[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Thu, 11 Nov 2021 16:19:21 +0300
From: Denis Kirjanov <dkirjanov@...e.de>
To: Dongliang Mu <mudongliangabcd@...il.com>,
Alexander Aring <alex.aring@...il.com>,
Stefan Schmidt <stefan@...enfreihafen.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: linux-wpan@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ieee802154: fix shift-out-of-bound in
nl802154_new_interface
11/11/21 3:51 PM, Dongliang Mu пишет:
> In nl802154_new_interface, if type retrieved from info->attr is
> NL802154_IFTYPE_UNSPEC(-1), i.e., less than NL802154_IFTYPE_MAX,
> it will trigger a shift-out-of-bound bug in BIT(type).
>
> Fix this by adding a condition to check if the variable type is
> larger than NL802154_IFTYPE_UNSPEC(-1).
Please add Fixes tag
>
> Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
> ---
> net/ieee802154/nl802154.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
> index 277124f206e0..cecf5ce0aa20 100644
> --- a/net/ieee802154/nl802154.c
> +++ b/net/ieee802154/nl802154.c
> @@ -915,7 +915,7 @@ static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
>
> if (info->attrs[NL802154_ATTR_IFTYPE]) {
> type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
> - if (type > NL802154_IFTYPE_MAX ||
> + if (type <= NL802154_IFTYPE_UNSPEC || type > NL802154_IFTYPE_MAX ||
> !(rdev->wpan_phy.supported.iftypes & BIT(type)))
> return -EINVAL;
> }
>
Powered by blists - more mailing lists