2023-11-17 00:33:35

by Stephen Rothwell

[permalink] [raw]

Subject: linux-next: build failure after merge of the kspp-gustavo tree

---

Hi all,

After merging the kspp-gustavo tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

In function 'do_byte_reverse',
inlined from 'do_vec_store' at arch/powerpc/lib/sstep.c:722:3,
inlined from 'emulate_loadstore' at arch/powerpc/lib/sstep.c:3510:9:
arch/powerpc/lib/sstep.c:287:23: error: writing 8 bytes into a region of size 0 [-Werror=stringop-overflow=]
287 | up[3] = tmp;
| ~~~~~~^~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:708:11: note: at offset [24, 39] into destination object 'u' of size 16
708 | } u;
| ^
In function 'do_byte_reverse',
inlined from 'do_vec_store' at arch/powerpc/lib/sstep.c:722:3,
inlined from 'emulate_loadstore' at arch/powerpc/lib/sstep.c:3510:9:
arch/powerpc/lib/sstep.c:289:23: error: writing 8 bytes into a region of size 0 [-Werror=stringop-overflow=]
289 | up[2] = byterev_8(up[1]);
| ~~~~~~^~~~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:708:11: note: at offset 16 into destination object 'u' of size 16
708 | } u;
| ^
In function 'do_byte_reverse',
inlined from 'do_vec_load' at arch/powerpc/lib/sstep.c:691:3,
inlined from 'emulate_loadstore' at arch/powerpc/lib/sstep.c:3439:9:
arch/powerpc/lib/sstep.c:287:23: error: writing 8 bytes into a region of size 0 [-Werror=stringop-overflow=]
287 | up[3] = tmp;
| ~~~~~~^~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into destination object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into destination object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into destination object 'u' of size 16
In function 'do_byte_reverse',
inlined from 'do_vec_load' at arch/powerpc/lib/sstep.c:691:3,
inlined from 'emulate_loadstore' at arch/powerpc/lib/sstep.c:3439:9:
arch/powerpc/lib/sstep.c:289:23: error: writing 8 bytes into a region of size 0 [-Werror=stringop-overflow=]
289 | up[2] = byterev_8(up[1]);
| ~~~~~~^~~~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
cc1: all warnings being treated as errors

Caused by commit

c94c73da81d7 ("Makefile: Enable -Wstringop-overflow globally")

I have used te kspp-gustavo tree from next-20231116 for today.

--
Cheers,
Stephen Rothwell

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2023-11-17 00:39:18

by Gustavo A. R. Silva

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Subject: Re: linux-next: build failure after merge of the kspp-gustavo tree

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> arch/powerpc/lib/sstep.c:289:23: error: writing 8 bytes into a region of size 0 [-Werror=stringop-overflow=]
> 289 | up[2] = byterev_8(up[1]);
> | ~~~~~~^~~~~~~~~~~~~~~~~~
> arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
> arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
> 681 | } u = {};
> | ^
> arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
> arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into destination object 'u' of size 16
> cc1: all warnings being treated as errors
>
> Caused by commit
>
> c94c73da81d7 ("Makefile: Enable -Wstringop-overflow globally")
>
> I have used te kspp-gustavo tree from next-20231116 for today.
>
I'll address those issues right away.

Thanks for the report, Stephen.
--
Gustavo