XPost: linux.debian.bugs.dist
From: u.kleine-koenig@baylibre.com

Control: tag -1 + fixed-upstream
Control: forwarded -1 https://lore.kernel.org/r/20250530221824.work.623-kees@kernel.org

Hello,

On Mon, May 05, 2025 at 05:40:57PM +0200, Ingo Saitz wrote:

When compiling the linux kernel (tested on 6.15-rc5 and 6.14.5 from kernel.org) with CONFIG_RANDSTRUCT enabled, gcc-15 throws an ICE:

arch/x86/kernel/cpu/proc.c:174:14: internal compiler error: in comptypes_check_enum_int, at c/c-typeck.cc:1516
174 | const struct seq_operations cpuinfo_op = {
| ^~~~~~~~~~~~~~

This is claimed to be fixed in upstream by commit https://git.kernel.org/linus/f39f18f3c3531aa802b58a20d39d96e82eb96c14
that is scheduled to be included in 6.16-rc1.

This wasn't explicitly marked for stable, but I think a backport would
be good.

Best regards
Uwe

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--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)

XPost: linux.debian.bugs.dist
From: gregkh@linuxfoundation.org

On Wed, Jun 04, 2025 at 10:43:11PM +0200, Uwe Kleine-König wrote:

Control: tag -1 + fixed-upstream
Control: forwarded -1 https://lore.kernel.org/r/20250530221824.work.623-kees@kernel.org

Hello,

On Mon, May 05, 2025 at 05:40:57PM +0200, Ingo Saitz wrote:

When compiling the linux kernel (tested on 6.15-rc5 and 6.14.5 from kernel.org) with CONFIG_RANDSTRUCT enabled, gcc-15 throws an ICE:

arch/x86/kernel/cpu/proc.c:174:14: internal compiler error: in comptypes_check_enum_int, at c/c-typeck.cc:1516
174 | const struct seq_operations cpuinfo_op = {
| ^~~~~~~~~~~~~~

This is claimed to be fixed in upstream by commit https://git.kernel.org/linus/f39f18f3c3531aa802b58a20d39d96e82eb96c14
that is scheduled to be included in 6.16-rc1.

This wasn't explicitly marked for stable, but I think a backport would
be good.

Does not apply cleanly, we need backports submitted to us to be able to
take it.

thanks,

greg k-h

--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)

XPost: linux.debian.bugs.dist
From: ingo@hannover.ccc.de

On Wed, Jun 04, 2025 at 10:43:11PM +0200, Uwe Kleine-König wrote:

Control: tag -1 + fixed-upstream
Control: forwarded -1 https://lore.kernel.org/r/20250530221824.work.623-kees@kernel.org

Hello,

On Mon, May 05, 2025 at 05:40:57PM +0200, Ingo Saitz wrote:

When compiling the linux kernel (tested on 6.15-rc5 and 6.14.5 from kernel.org) with CONFIG_RANDSTRUCT enabled, gcc-15 throws an ICE:

arch/x86/kernel/cpu/proc.c:174:14: internal compiler error: in comptypes_check_enum_int, at c/c-typeck.cc:1516
174 | const struct seq_operations cpuinfo_op = {
| ^~~~~~~~~~~~~~

This is claimed to be fixed in upstream by commit https://git.kernel.org/linus/f39f18f3c3531aa802b58a20d39d96e82eb96c14
that is scheduled to be included in 6.16-rc1.

I can confirm applying the patches

e136a4062174a9a8d1c1447ca040ea81accfa6a8: randstruct: gcc-plugin: Remove bogus void member
f39f18f3c3531aa802b58a20d39d96e82eb96c14: randstruct: gcc-plugin: Fix attribute addition

fixes the compile issue (on vanilla 6.12, 6.14 and 6.15 kernel trees;
the kernels seem to run fine, too, so far). The first patch was needed
for the second to apply cleanly. But I can try to backport only f39f18f3c3531aa802b58a20d39d96e82eb96c14 and see if it still compiles.

This wasn't explicitly marked for stable, but I think a backport would
be good.

Best regards
Uwe

Ingo
--
const_cast<long double>(Λ)

--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)

XPost: linux.debian.bugs.dist
From: ben@decadent.org.uk

Control: tag -1 experimental patch
Control: found -1 6.12.32-1
Control: found -1 6.15.1-1~exp1

I'm marking this found in the current versions of linux in unstable and experimental. I'm tagging it experimental because gcc-15 is not yet in unstable, and patch because we have identified the patch(es) to fix it.

I also verified that applying the 2 patches fixes the build failure with Debian's gcc-15 and the above versions of the kernel source, and doesn't regress building with Debian's gcc-14.

Ben.

--
Ben Hutchings
It is a miracle that curiosity survives formal education.
- Albert Einstein

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--- SoupGate-Win32

XPost: linux.debian.bugs.dist
From: gregkh@linuxfoundation.org

On Wed, Jun 11, 2025 at 06:40:48PM +0200, Uwe Kleine-König wrote:

Hello Greg, hello Ingo,

On Sun, Jun 08, 2025 at 10:25:50AM +0200, Ingo Saitz wrote:

On Wed, Jun 04, 2025 at 10:43:11PM +0200, Uwe Kleine-König wrote:

Control: tag -1 + fixed-upstream
Control: forwarded -1 https://lore.kernel.org/r/20250530221824.work.623-kees@kernel.org

Hello,

On Mon, May 05, 2025 at 05:40:57PM +0200, Ingo Saitz wrote:

When compiling the linux kernel (tested on 6.15-rc5 and 6.14.5 from kernel.org) with CONFIG_RANDSTRUCT enabled, gcc-15 throws an ICE:

arch/x86/kernel/cpu/proc.c:174:14: internal compiler error: in comptypes_check_enum_int, at c/c-typeck.cc:1516
174 | const struct seq_operations cpuinfo_op = {
| ^~~~~~~~~~~~~~

This is claimed to be fixed in upstream by commit https://git.kernel.org/linus/f39f18f3c3531aa802b58a20d39d96e82eb96c14 that is scheduled to be included in 6.16-rc1.

I can confirm applying the patches

e136a4062174a9a8d1c1447ca040ea81accfa6a8: randstruct: gcc-plugin: Remove bogus void member
f39f18f3c3531aa802b58a20d39d96e82eb96c14: randstruct: gcc-plugin: Fix attribute addition

fixes the compile issue (on vanilla 6.12, 6.14 and 6.15 kernel trees;
the kernels seem to run fine, too, so far). The first patch was needed
for the second to apply cleanly. But I can try to backport only f39f18f3c3531aa802b58a20d39d96e82eb96c14 and see if it still compiles.

@Ingo: Thanks for testing and confirming the backport works.

@gregkh: I think it's reasonable to backport both e136a4062174a9a8d1c1447ca040ea81accfa6a8 and f39f18f3c3531aa802b58a20d39d96e82eb96c14. Do you already have these on
your radar?

They are in the stable queues now.

thanks,

greg k-h

--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)