netdev - Re: [PATCH net-next v7 1/5] rust: core abstractions for network PHY drivers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8fde6a54-8b15-4b0f-bf09-b54bd21eb9df@lunn.ch>
Date: Sat, 28 Oct 2023 00:36:35 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Boqun Feng <boqun.feng@...il.com>
Cc: Benno Lossin <benno.lossin@...ton.me>,
	FUJITA Tomonori <fujita.tomonori@...il.com>, netdev@...r.kernel.org,
	rust-for-linux@...r.kernel.org, tmgross@...ch.edu,
	miguel.ojeda.sandonis@...il.com, wedsonaf@...il.com
Subject: Re: [PATCH net-next v7 1/5] rust: core abstractions for network PHY
 drivers

> Hmm... but does it mean even `set_speed()` has the similar issue?
> 
> 	let phydev: *mut phy_device = self.0.get();
> 	unsafe { (*phydev).speed = ...; }
> 
> The `(*phydev)` creates a `&mut` IIUC. So we need the following maybe?
> 
> 	let phydev: *mut phy_device = self.0.get();
> 	unsafe { *addr_mut_of!((*phydev).speed) = ...; }
> 
> because at least from phylib core guarantee, we know no one accessing
> `speed` in the same time. However, yes, bit fields are tricky...

Speed is not a bitfield. Its a plain boring int. link is however a bit
field.

	Andrew