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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ZfzMFv3zmYY36l9u@shell.armlinux.org.uk>
Date: Fri, 22 Mar 2024 00:08:54 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Ard Biesheuvel <ardb@...nel.org>
Cc: David Laight <David.Laight@...lab.com>,
	Jiangfeng Xiao <xiaojiangfeng@...wei.com>,
	"arnd@...db.de" <arnd@...db.de>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"haibo.li@...iatek.com" <haibo.li@...iatek.com>,
	"angelogioacchino.delregno@...labora.com" <angelogioacchino.delregno@...labora.com>,
	"amergnat@...libre.com" <amergnat@...libre.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
	"douzhaolei@...wei.com" <douzhaolei@...wei.com>,
	"gustavoars@...nel.org" <gustavoars@...nel.org>,
	"jpoimboe@...nel.org" <jpoimboe@...nel.org>,
	"kepler.chenxin@...wei.com" <kepler.chenxin@...wei.com>,
	"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
	"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"nixiaoming@...wei.com" <nixiaoming@...wei.com>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"wangbing6@...wei.com" <wangbing6@...wei.com>,
	"wangfangpeng1@...wei.com" <wangfangpeng1@...wei.com>,
	"jannh@...gle.com" <jannh@...gle.com>,
	"willy@...radead.org" <willy@...radead.org>
Subject: Re: [PATCH v2] ARM: unwind: improve unwinders for noreturn case

On Thu, Mar 21, 2024 at 11:43:41PM +0100, Ard Biesheuvel wrote:
> Given that this particular issue would just disappear if the compiler
> would just insert a BRK after the BL, I'd prefer to explore first
> whether we can get this fixed on the compiler side.

Arm32 doesn't have a BRK instruction. What would be appropriate after
the no-return BL would be OS specific.

Maybe a branch to "abort" would be a good idea though.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ