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  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]
Date:   Sun, 10 May 2020 17:50:28 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Vegard Nossum <vegard.nossum@...cle.com>
Cc:     Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, luto@...nel.org, tony.luck@...el.com,
        chang.seok.bae@...el.com
Subject: Re: [PATCH v10 00/18] Enable FSGSBASE instructions

> So this is a check that checks if you're running in user mode if
> you have a debug trap with single step, but somehow it triggered
> for a user segment.
> 
> Probably the regs got corrupted. 
> 
> Sasha, I suspect you're missing a mov %rsp,%rdi somewhere in the
> debug entry path that sets up the regs argument for the C code.

... Ah never mind. Thomas has a better explanation.

-Andi

Powered by blists - more mailing lists