Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1207026

Re: [regression] x86/signal/64: Fix SS handling for signals delivered to 64-bit programs breaks dosemu

From Stas Sergeev <stsp@list.ru>
Newsgroups linux.kernel
Subject Re: [regression] x86/signal/64: Fix SS handling for signals delivered to 64-bit programs breaks dosemu
Date 2015-08-13 20:00 +0200
Message-ID <pX4Xf-23o-3@gated-at.bofh.it> (permalink)
References <pWrVU-4h9-5@gated-at.bofh.it> <pX2LL-7qM-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

13.08.2015 18:37, Linus Torvalds пишет:
> On Tue, Aug 11, 2015 at 5:17 PM, Stas Sergeev <stsp@list.ru> wrote:
>> I realize this patch may be good to have in general, but
>> breaking userspace without a single warning is a bit
>> discouraging. Seems like the old "we don't break userspace"
>> rule have gone.
> That rule hasn't gone anywhere.
>
> Does a plain revert just fix everything? Because if so, that's the
> right thing to do, and we can just re-visit this later.
>
> I don't understand why Andy and Ingo are even discussing this. What
> the f*ck, guys?
>
> Stas, can you verify that this actually fixes it? There's two
> different versions here: one that reverts *just* that one commit, and
> one that reverts the fs/gs changes too. Can you test them both?
Hello Linus, I verified that patch-minimal.diff is enough
to fix the problem, BUT! dosemu is in fact using the .fs and
.gs fields of sigcontext as a placeholders. Why the minimal
patch alone helps is simply because the kernel headers
installed in a system do not yet represent the newer kernel
developments and have the .fs and .gs fields in.
So, to allow the pre-compiled dosemu binary to run, patch-minimal
is enough. To allow re-compiling it, you'd need patch.diff.
Although I guess compilation is not the point, and the
fact that the pre-compiled binary works, is enough.

Now my PC is dying of overheat, I am struggling to even
boot it. I am not sure I'll test the "really-minimal" patch,
but it will unlikely to help because dosemu expects unmodified
ss in a sighandler, which "really-minimal" patch doesn't seem
to give.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[regression] x86/signal/64: Fix SS handling for signals delivered to  64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 02:20 +0200
  Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 02:40 +0200
    Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 10:30 +0200
      Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 18:20 +0200
        Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 19:10 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 20:30 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 21:00 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 21:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 22:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 22:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 22:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 22:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 22:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 23:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-12 23:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 00:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 00:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals  delivered to 64-bit programs breaks dosemu Ingo Molnar <mingo@kernel.org> - 2015-08-13 10:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 12:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 14:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 17:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 17:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 17:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 18:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 18:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 18:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 18:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 18:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 18:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 19:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 19:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 19:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 20:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 20:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 20:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 20:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 20:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 18:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 13:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-12 22:50 +0200
  Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 17:40 +0200
    Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 17:50 +0200
      Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 18:20 +0200
        Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 18:30 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 18:40 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 18:50 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 18:50 +0200
      Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Brian Gerst <brgerst@gmail.com> - 2015-08-13 19:10 +0200
        Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-18 08:40 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-19 00:50 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-19 11:40 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-19 17:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-19 18:40 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-19 00:50 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-19 12:20 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-19 17:40 +0200
      Re: [regression] x86/signal/64: Fix SS handling for signals  delivered to 64-bit programs breaks dosemu Cyrill Gorcunov <gorcunov@gmail.com> - 2015-08-14 10:20 +0200
    Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 20:00 +0200
      Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 20:40 +0200
        Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 20:50 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 21:10 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 21:50 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 22:20 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 22:00 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals  delivered to 64-bit programs breaks dosemu Cyrill Gorcunov <gorcunov@gmail.com> - 2015-08-13 22:10 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 22:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Raymond Jennings <shentino@gmail.com> - 2015-08-13 23:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 23:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Raymond Jennings <shentino@gmail.com> - 2015-08-14 00:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 00:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 01:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 01:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Raymond Jennings <shentino@gmail.com> - 2015-08-14 01:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 01:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 02:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 00:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 00:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 00:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 00:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 01:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 01:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 01:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 02:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 02:20 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 02:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 03:00 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 03:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 03:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 04:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-18 08:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 03:40 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 02:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-14 02:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-14 02:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-14 02:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals  delivered to 64-bit programs breaks dosemu Cyrill Gorcunov <gorcunov@gmail.com> - 2015-08-14 09:30 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Pavel Emelyanov <xemul@parallels.com> - 2015-08-14 12:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals  delivered to 64-bit programs breaks dosemu Cyrill Gorcunov <gorcunov@gmail.com> - 2015-08-14 13:00 +0200
        Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 21:00 +0200
          Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Andy Lutomirski <luto@amacapital.net> - 2015-08-13 21:10 +0200
            Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 21:20 +0200
              Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 21:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Linus Torvalds <torvalds@linux-foundation.org> - 2015-08-13 22:10 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-18 08:50 +0200
                Re: [regression] x86/signal/64: Fix SS handling for signals delivered  to 64-bit programs breaks dosemu Stas Sergeev <stsp@list.ru> - 2015-08-13 22:10 +0200

csiph-web