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

From: Kalle Valo
Date: Tue Dec 20 2016 - 06:21:42 EST


Larry Finger <Larry.Finger@xxxxxxxxxxxx> 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@xxxxxxxxxxxx>
> Cc: Stable <stable@xxxxxxxxxxxxxxx> (4.9+)

And this:

Cc: Stable <stable@xxxxxxxxxxxxxxx> # 4.9+

I can fix both of them.

> Cc: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
> ---
> 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