linux-kernel - Re: [PATCH] x86/kexec: prefer _THIS_IP_ to current_text

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]

Date:   Mon, 20 Aug 2018 10:58:41 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>, mingo@...hat.com,
        hpa@...or.com, "Eric W . Biederman" <ebiederm@...ssion.com>,
        Simon Horman <horms@...ge.net.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Nathan Chancellor <natechancellor@...il.com>, x86@...nel.org,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>, kexec@...ts.infradead.org
Subject: Re: [PATCH] x86/kexec: prefer _THIS_IP_ to current_text_addr

+ akpm, Linus

Bumping for review.

On Mon, Aug 13, 2018 at 2:32 PM Nick Desaulniers
<ndesaulniers@...gle.com> wrote:
>
> + Simon (kexec)
>
> bumping for review.
> On Wed, Aug 8, 2018 at 4:06 PM Nick Desaulniers <ndesaulniers@...gle.com> wrote:
> >
> > bumping for review
> > On Wed, Aug 1, 2018 at 2:08 PM Nick Desaulniers <ndesaulniers@...gle.com> wrote:
> > >
> > > As part of the effort to reduce the code duplication between _THIS_IP_
> > > and current_text_addr(), let's consolidate callers of
> > > current_text_addr() to use _THIS_IP_.
> > >
> > > Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
> > > ---
> > >  arch/x86/include/asm/kexec.h | 3 ++-
> > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
> > > index f327236f0fa7..86924d594ecd 100644
> > > --- a/arch/x86/include/asm/kexec.h
> > > +++ b/arch/x86/include/asm/kexec.h
> > > @@ -21,6 +21,7 @@
> > >  #ifndef __ASSEMBLY__
> > >
> > >  #include <linux/string.h>
> > > +#include <linux/kernel.h>
> > >
> > >  #include <asm/page.h>
> > >  #include <asm/ptrace.h>
> > > @@ -132,7 +133,7 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
> > >                 asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
> > >                 asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
> > >  #endif
> > > -               newregs->ip = (unsigned long)current_text_addr();
> > > +               newregs->ip = _THIS_IP_;
> > >         }
> > >  }
> > >
> > > --
> > > 2.18.0.597.ga71716f1ad-goog
> > >

-- 
Thanks,
~Nick Desaulniers