From: Pkshih <pkshih@realtek.com>
To: "kjlu@umn.edu" <kjlu@umn.edu>
Cc: "mingo@kernel.org" <mingo@kernel.org>,
"Larry.Finger@lwfinger.net" <Larry.Finger@lwfinger.net>,
"rdunlap@infradead.org" <rdunlap@infradead.org>,
"pakki001@umn.edu" <pakki001@umn.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"kvalo@codeaurora.org" <kvalo@codeaurora.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: [PATCH] net: rtl8192c: fix a potential NULL pointer dereference
Date: Tue, 12 Mar 2019 09:03:41 +0000 [thread overview]
Message-ID: <1552381414.27421.2.camel@realtek.com> (raw)
In-Reply-To: <20190312075948.1569-1-kjlu@umn.edu>
On Tue, 2019-03-12 at 02:59 -0500, Kangjie Lu wrote:
> In case dev_alloc_skb fails, the fix safely returns to avoid
> potential NULL pointer dereference.
>
> Signed-off-by: Kangjie Lu <kjlu@umn.edu>
> ---
> drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c
> b/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c
> index 18c76990a089..9042fc044c7e 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c
> @@ -623,6 +623,9 @@ void rtl92c_set_fw_rsvdpagepkt(struct ieee80211_hw *hw,
> u1rsvdpageloc, 3);
>
> skb = dev_alloc_skb(totalpacketlen);
> + if (!skb)
> + return;
> +
> skb_put_data(skb, &reserved_page_packet, totalpacketlen);
>
> if (cmd_send_packet)
The subject prefix should be 'rtlwifi: ...'.
Your fix is ok, but I would like to fix all failed cases of dev_alloc_skb().
I will send another patch to fix all of them.
Thanks
PK
prev parent reply other threads:[~2019-03-12 9:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-12 7:59 [PATCH] net: rtl8192c: fix a potential NULL pointer dereference Kangjie Lu
2019-03-12 9:03 ` Pkshih [this message]
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