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* [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working
@ 2022-05-30 19:41 bugzilla
  2022-05-30 22:04 ` [Buildroot] [Bug 14826] " bugzilla
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: bugzilla @ 2022-05-30 19:41 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

            Bug ID: 14826
           Summary: make qemu_x86_64_defconfig stopped working
           Product: buildroot
           Version: 2022.02.2
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned@buildroot.uclibc.org
          Reporter: buildroot@apitman.com
                CC: buildroot@uclibc.org
  Target Milestone: ---

Runnning

make qemu_x86_64_defconfig; make clean all

has stopped working for me. I get the following compilation error:



In file included from sigchain.c:3:
In function 'xrealloc',
    inlined from 'sigchain_push.isra' at sigchain.c:26:2:
subcmd-util.h:56:23: error: pointer may be used after 'realloc'
[-Werror=use-after-free]
   56 |                 ret = realloc(ptr, size);
      |                       ^~~~~~~~~~~~~~~~~~
subcmd-util.h:52:21: note: call to 'realloc' here
   52 |         void *ret = realloc(ptr, size);
      |                     ^~~~~~~~~~~~~~~~~~
subcmd-util.h:58:31: error: pointer may be used after 'realloc'
[-Werror=use-after-free]
   58 |                         ret = realloc(ptr, 1);
      |                               ^~~~~~~~~~~~~~~
subcmd-util.h:52:21: note: call to 'realloc' here
   52 |         void *ret = realloc(ptr, size);
      |                     ^~~~~~~~~~~~~~~~~~
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  CC      scripts/mod/devicetable-offsets.s
In function 'xrealloc',
    inlined from 'sigchain_push' at sigchain.c:26:2,
    inlined from 'sigchain_push_common' at sigchain.c:53:2:
subcmd-util.h:56:23: error: pointer may be used after 'realloc'
[-Werror=use-after-free]
   56 |                 ret = realloc(ptr, size);
      |                       ^~~~~~~~~~~~~~~~~~
subcmd-util.h:52:21: note: call to 'realloc' here
   52 |         void *ret = realloc(ptr, size);
      |                     ^~~~~~~~~~~~~~~~~~
subcmd-util.h:58:31: error: pointer may be used after 'realloc'
[-Werror=use-after-free]
   58 |                         ret = realloc(ptr, 1);
      |                               ^~~~~~~~~~~~~~~
subcmd-util.h:52:21: note: call to 'realloc' here
   52 |         void *ret = realloc(ptr, size);
      |                     ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
@ 2022-05-30 22:04 ` bugzilla
  2022-05-30 23:40 ` bugzilla
                   ` (5 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-30 22:04 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yann.morin.1998@free.fr

--- Comment #1 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Hello,

I am afraid I was not able to reproduce the failure.

From a clean checkout of git master (d590003), I did:

    make qemu_x86_64_defconfig
    make

And the build succeeded.

What version of Buildroot are you using?
What system are you building on?

Regards,
Yann E. MORIN.

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
  2022-05-30 22:04 ` [Buildroot] [Bug 14826] " bugzilla
@ 2022-05-30 23:40 ` bugzilla
  2022-05-30 23:41 ` bugzilla
                   ` (4 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-30 23:40 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

--- Comment #2 from buildroot@apitman.com ---
I'd say that's good news. I just tried master and it doesn't work either.

A system update just broke something on my end. I'm using Arch on kernel
5.17.9.

Is there a recommended distro to use for building buildroot?

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
  2022-05-30 22:04 ` [Buildroot] [Bug 14826] " bugzilla
  2022-05-30 23:40 ` bugzilla
@ 2022-05-30 23:41 ` bugzilla
  2022-05-31  9:28 ` bugzilla
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-30 23:41 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

--- Comment #3 from buildroot@apitman.com ---
I'd say that's good news. I just tried master and it doesn't work either.

A system update just broke something on my end. I'm using Arch on kernel
5.17.9.

Is there a recommended distro to use for building buildroot?

EDIT: **A system update probably broke something on my end

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
                   ` (2 preceding siblings ...)
  2022-05-30 23:41 ` bugzilla
@ 2022-05-31  9:28 ` bugzilla
  2022-05-31 12:15 ` bugzilla
                   ` (2 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-31  9:28 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

--- Comment #4 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Hello,

This issue is caused by a gcc-12 extra check about use-after-free,
which has been fixed in the kernel with:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=52a9dab6d892763b2a8334a568bd4e2c1a6fde66

You hit this issue because Archlinux is now using gcc-12.1.0 as the
default compiler, and because the kernel uses -Werror to build that
host tool.

So, either update your kernel to one that has the fix, or backport it
yourself, or downgrade your compiler to a (slightly) older one.

Regards,
Yann E. MORIN.

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
                   ` (3 preceding siblings ...)
  2022-05-31  9:28 ` bugzilla
@ 2022-05-31 12:15 ` bugzilla
  2022-05-31 17:48 ` bugzilla
  2022-06-04  8:24 ` bugzilla
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-31 12:15 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned@buildroot.uclibc |yann.morin.1998@free.fr
                   |.org                        |

--- Comment #5 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Created attachment 9316
  --> https://bugs.busybox.net/attachment.cgi?id=9316&action=edit
linux: don't build host tools with -Werror

Hello,

Can you please try this patch, and report the result?

If that works for you, I'll submit a proper patch later.

Regards,
Yann E. MORIN.

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
                   ` (4 preceding siblings ...)
  2022-05-31 12:15 ` bugzilla
@ 2022-05-31 17:48 ` bugzilla
  2022-06-04  8:24 ` bugzilla
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-05-31 17:48 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

--- Comment #6 from buildroot@apitman.com ---
Thanks for figuring this out! I can confirm that the patch works on master,
commit eb5e2d2d43c5c0f71ae8243081625261de2cd134.

Bit of a tangential question: is there an easy way to see what kernel version
commit 52a9dab6d892763b2a8334a568bd4e2c1a6fde66 would have made it into?

Thanks again!

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [Buildroot] [Bug 14826] make qemu_x86_64_defconfig stopped working
  2022-05-30 19:41 [Buildroot] [Bug 14826] New: make qemu_x86_64_defconfig stopped working bugzilla
                   ` (5 preceding siblings ...)
  2022-05-31 17:48 ` bugzilla
@ 2022-06-04  8:24 ` bugzilla
  6 siblings, 0 replies; 8+ messages in thread
From: bugzilla @ 2022-06-04  8:24 UTC (permalink / raw)
  To: buildroot

https://bugs.busybox.net/show_bug.cgi?id=14826

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Yann E. MORIN <yann.morin.1998@free.fr> ---
All,

Thanks for the report. We believe this has now been fixed with commit
baa55a4e26e6 (linux: disable -Werror when building host tools) that has
just been applied to master.

Regards,
Yann E. MORIN.

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^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2022-06-04  8:24 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2022-05-30 23:40 ` bugzilla
2022-05-30 23:41 ` bugzilla
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