Re: memory leakage in ncm_wrap_ntb() in USB ncm mode with kernel 5.15

[gregkh]

On Sun, May 19, 2024 at 10:23:10PM +0800, nanfengwq@xxxxxxxx wrote:
> Hello：
> I have discovered a risk of memory leakage in ncm_wrap_ntb() under USB ncm mode in kernel 5.15, and I have fixed it. 
> Please help me review it.
> 
> If this modification is effective, it can also be integrated into other kernel versions, such as kernel 4.14, and so on.
> 
> The logic of a memory leak is as follows:
> 
> If the return value skb2 of  package_for_tx() is not NULL, and the return value ncm->skb_tx_data of alloc_skb() is NULL, then the code will go to err, where there is no processing of skb2, resulting in a memory leak in skb2.
> 
> 
> Thank you.
> 
> 
> 
> 


Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
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