From: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
To: Richard Sailer <richard_siegfried@systemli.org>
Cc: kernelnewbies <Kernelnewbies@kernelnewbies.org>
Subject: Re: Dubios pointer casting with put_user()
Date: Fri, 17 Jul 2020 18:46:46 -0400 [thread overview]
Message-ID: <96764.1595026006@turing-police> (raw)
In-Reply-To: <d8a96eaf-3cbf-a088-5dd5-ad8b64ec9749@systemli.org>
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On Fri, 17 Jul 2020 02:13:34 +0200, Richard Sailer said:
> unsigned long. Is this (correctness and security wise) sane? Because as
> I understand it put_user() determines the amount it copies from the
> pointer type.
> rc = put_user(amount, (int __user *)arg);
If that were true, you wouldn't need to pass the 'amount' variable....
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next prev parent reply other threads:[~2020-07-17 22:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-17 0:13 Dubios pointer casting with put_user() Richard Sailer
2020-07-17 0:19 ` Richard Sailer
2020-07-17 22:46 ` Valdis Klētnieks [this message]
2020-07-19 12:15 ` Richard Sailer
2020-07-19 22:50 ` Valdis Klētnieks
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