linux-kernel - Re: [RFC PATCH v3 0/2] selftests/x86: sysret

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: <e48a7629-f357-ed3c-9f43-b1499930ceff@citrix.com>
Date:   Tue, 24 Jan 2023 21:51:35 +0000
From:   Andrew Cooper <Andrew.Cooper3@...rix.com>
To:     "Li, Xin3" <xin3.li@...el.com>,
        Ammar Faizi <ammarfaizi2@...weeb.org>,
        "H. Peter Anvin" <hpa@...or.com>, x86 Mailing List <x86@...nel.org>
CC:     "Hansen, Dave" <dave.hansen@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Brian Gerst <brgerst@...il.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        "Lutomirski, Andy" <luto@...nel.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linux Kselftest Mailing List 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Cooper <Andrew.Cooper3@...rix.com>
Subject: Re: [RFC PATCH v3 0/2] selftests/x86: sysret_rip update for FRED
 system

On 24/01/2023 9:32 pm, Li, Xin3 wrote:
>> From: Ammar Faizi <ammarfaizi2@...weeb.org>
>>
>> This is an RFC patchset v3:
>> sysret_rip test update for Intel FRED architecture.
>>
>> Xin Li reported sysret_rip test fails at:
>>
>>         assert(ctx->uc_mcontext.gregs[REG_EFL] ==
>>                ctx->uc_mcontext.gregs[REG_R11]);
> On FRED systems, flags is 0x200a93 and r11 is 0xfeedfacedeadbeef here.

Is this under SIMICS, or elsewhere?  It's doubly weird that flags/%r11
match, but %rip/%rcx don't.

~Andrew