linux-kernel - Re: [PATCH] rtlwifi: Fix kernel oops introduced with commit e49656147359

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Message-ID: <87wpeuu9qm.fsf@kamboji.qca.qualcomm.com>
Date:   Tue, 20 Dec 2016 13:21:21 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Larry Finger <Larry.Finger@...inger.net>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, driver-devel@...r.kernel.org,
        Stable <stable@...r.kernel.org>,
        Wei Yongjun <weiyongjun1@...wei.com>
Subject: Re: [PATCH] rtlwifi: Fix kernel oops introduced with commit e49656147359

Larry Finger <Larry.Finger@...inger.net> writes:

> With commit e49656147359 {"rtlwifi: Use dev_kfree_skb_irq instead of
> kfree_skb"), the method used to free an skb was changed because the
> kfree_skb() was inside a spinlock. What was forgotten is that kfree_skb()
> guards against a NULL value for the argument. Routine dev_kfree_skb_irq()
> does not, and a test is needed to prevent kernel panics.
>
> Fixes: commit e49656147359 {"rtlwifi: Use dev_kfree_skb_irq instead of kfree_skb")

This should be:

Fixes: e49656147359 ("rtlwifi: Use dev_kfree_skb_irq instead of kfree_skb")

> Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
> Cc: Stable <stable@...r.kernel.org> (4.9+)

And this:

Cc: Stable <stable@...r.kernel.org> # 4.9+

I can fix both of them.

> Cc: Wei Yongjun <weiyongjun1@...wei.com>
> ---
> Kalle,
>
> This change should be sent to mainline during the 4.10 merge period,
> or as soon as possible.

Ok, I'll queue this to 4.10. Most likely I'll send a pull request to
Dave later this week or so.

-- 
Kalle Valo