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From: David Hildenbrand <david@redhat.com>
To: "Екатерина Есина" <eesina@astralinux.ru>,
	"Mike Kravetz" <mike.kravetz@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	lvc-project@linuxtesting.org
Subject: Re: [PATCH mm] mm: hugetlb: Add checks for NULL for vma returned from find_vma. find_vma may return NULL, that's why its return value is usually checked for NULL.
Date: Mon, 16 Jan 2023 16:12:48 +0100	[thread overview]
Message-ID: <a402b90d-372e-2774-d2c4-ceae64c6eed2@redhat.com> (raw)
In-Reply-To: <182575210.374192581.1673881818398.JavaMail.zimbra@astralinux.ru>

On 16.01.23 16:10, Екатерина Есина wrote:
> Sorry, I've noticed that I'd sent the patch without description and sent 
> version 2.
> Function find_vma may return NULL, that's why its return value is 
> usually checked for NULL. In this case vma and its fields also should be 
> checked before dereferencing to avoid NULL pointer dereference

Thanks, but again

What are the symptoms? How exactly does this BUG manifest?

For example, does the kernel crash, and if so, how can it be triggered?

-- 
Thanks,

David / dhildenb


  parent reply	other threads:[~2023-01-16 15:21 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-16 10:05 Esina Ekaterina
2023-01-16 13:24 ` David Hildenbrand
     [not found]   ` <182575210.374192581.1673881818398.JavaMail.zimbra@astralinux.ru>
2023-01-16 15:12     ` David Hildenbrand [this message]
2023-01-16 15:21       ` Matthew Wilcox

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