Re: [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer

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To: Chang Yu <marcus.yu.56@xxxxxxxxx>
Subject: Re: [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer
From: David Howells <dhowells@xxxxxxxxxx>
Date: Mon, 23 Sep 2024 08:12:23 +0100
Cc: dhowells@xxxxxxxxxx, jlayton@xxxxxxxxxx, netfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, skhan@xxxxxxxxxxxxxxxxxxx
In-reply-to: <Zu4doSKzXfSuVipQ@gmail.com>
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Chang Yu <marcus.yu.56@xxxxxxxxx> wrote:

> Use kzalloc instead of kmalloc in netfs_buffer_append_folio to fix
> a KMSAN uninit-value error in netfs_clear_buffer

Btw, is this a theoretical error or are you actually seeing an uninitialised
pointer being dereferenced?

David

References:
- [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer
  - From: Chang Yu

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