linux-kernel - Re: [PATCH v2] staging: mmal-vchiq: add a check for the return of vmalloc()

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Message-ID: <tencent_84264ACEFF062098CC35B9C01C7A1464E108@qq.com>
Date:   Wed, 16 Mar 2022 00:23:05 +0800
From:   "Xiaoke Wang" <xkernel.wang@...mail.com>
To:     "gregkh" <gregkh@...uxfoundation.org>,
        "dan.carpenter" <dan.carpenter@...cle.com>
Cc:     "nsaenz" <nsaenz@...nel.org>,
        "bcm-kernel-feedback-list" 
        <bcm-kernel-feedback-list@...adcom.com>,
        "linux-rpi-kernel" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "linux-arm-kernel" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-staging" 
        <linux-staging@...ts.linux.dev>,
        "linux-kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] staging: mmal-vchiq: add a check for the return of vmalloc()

On Tue, 15 Mar 2022 16:27:38 +0100, Greg KH wrote:
&gt; Your change just crashed the kernel :(
&gt;
&gt; Please be more careful

I am sorry. I ever been told that vfree(NULL) or kfree(NULL) is safe,
so I just jump to the tag `err_free` in this version.
I will resend one by adding a new proper tag.
And in fact, I did not find where -&gt;bulk_scratch is used.

Regards,
Xiaoke Wang