linux-kernel - Re: [PATCH 12/19] x86/signal: Land on &frame->retcode when vdso isn't mapped

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: <CALCETrW7zQMRZOJFVN5AsqMAy=F6jnVyj+QL_w3-xEghqT3XJw@mail.gmail.com>
Date:   Sun, 8 Nov 2020 11:06:36 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Guo Ren <guoren@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Will Deacon <will@...nel.org>, X86 ML <x86@...nel.org>
Subject: Re: [PATCH 12/19] x86/signal: Land on &frame->retcode when vdso isn't mapped

On Sat, Nov 7, 2020 at 9:17 PM Dmitry Safonov <dima@...sta.com> wrote:
>
> Since commit 9fbbd4dd17d0 ("x86: Don't require the vDSO for handling
> a.out signals") after processing 32-bit signal if there is no vdso
> mapped frame->retcode is used as a landing.
> Do the same for rt ia32 signals.

Am I reading correctly that this makes the ia32 compat signals match
the native ia32 case?

--Andy