linux-kernel - Re: [PATCH 096/190] Revert "net: mwifiex: fix a NULL pointer dereference"

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Message-ID: <YIjyiWam0Zqq1XMZ@kroah.com>
Date:   Wed, 28 Apr 2021 07:28:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Kangjie Lu <kjlu@....edu>, Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [PATCH 096/190] Revert "net: mwifiex: fix a NULL pointer
 dereference"

On Wed, Apr 21, 2021 at 02:59:31PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit e5b9b206f3f6376b9a1406b67eafe4e7bb9f123c.
> 
> Commits from @umn.edu addresses have been found to be submitted in "bad
> faith" to try to test the kernel community's ability to review "known
> malicious" changes.  The result of these submissions can be found in a
> paper published at the 42nd IEEE Symposium on Security and Privacy
> entitled, "Open Source Insecurity: Stealthily Introducing
> Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> of Minnesota) and Kangjie Lu (University of Minnesota).
> 
> Because of this, all submissions from this group must be reverted from
> the kernel tree and will need to be re-reviewed again to determine if
> they actually are a valid fix.  Until that work is complete, remove this
> change to ensure that no problems are being introduced into the
> codebase.
> 
> Cc: Kangjie Lu <kjlu@....edu>
> Cc: Kalle Valo <kvalo@...eaurora.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/net/wireless/marvell/mwifiex/cmdevt.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> index 3a11342a6bde..bda8a236e386 100644
> --- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> +++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> @@ -339,12 +339,6 @@ static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
>  		sleep_cfm_tmp =
>  			dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
>  				      + MWIFIEX_TYPE_LEN);
> -		if (!sleep_cfm_tmp) {
> -			mwifiex_dbg(adapter, ERROR,
> -				    "SLEEP_CFM: dev_alloc_skb failed\n");
> -			return -ENOMEM;
> -		}
> -
>  		skb_put(sleep_cfm_tmp, sizeof(struct mwifiex_opt_sleep_confirm)
>  			+ MWIFIEX_TYPE_LEN);
>  		put_unaligned_le32(MWIFIEX_USB_TYPE_CMD, sleep_cfm_tmp->data);
> -- 
> 2.31.1
> 

This looks fine, I'll drop this revert.

greg k-h