linux-kernel - Re: [PATCH v2 5/7] mm/vmalloc: skip the uninitilized vmalloc areas

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Message-ID: <Y6APwfb9v2t3xUhv@MiWiFi-R3L-srv>
Date:   Mon, 19 Dec 2022 15:16:17 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Lorenzo Stoakes <lstoakes@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org, urezki@...il.com,
        stephen.s.brennan@...cle.com, willy@...radead.org,
        akpm@...ux-foundation.org, hch@...radead.org
Subject: Re: [PATCH v2 5/7] mm/vmalloc: skip the uninitilized vmalloc areas

On 12/17/22 at 12:07pm, Lorenzo Stoakes wrote:
> On Sat, Dec 17, 2022 at 09:54:33AM +0800, Baoquan He wrote:
> > @@ -3617,6 +3617,11 @@ long vread(char *buf, char *addr, unsigned long count)
> >  		if (!vm && !flags)
> >  			continue;
> >
> > +		if (vm->flags & VM_UNINITIALIZED)
> > +			continue;
> 
> This comes immediately after asserting that vm _might be null_. This surely must become:-
> 
> if (vm && vm->flags & VM_UNINITIALIZED)
>         continue;

You are right, will fix it in v3. Thanks for careful reivewing.