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Message-ID: <YpbUcPrm61RLIiZF@debian.me>
Date: Wed, 1 Jun 2022 09:52:32 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: linuxppc-dev@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Anders Roxell <anders.roxell@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Yang Li <yang.lee@...ux.alibaba.com>
Subject: outside array bounds error on ppc64_defconfig, GCC 12.1.0
Hi,
I'm trying to verify Drop ppc_inst_as_str() patch on [1] by performing
ppc64_defconfig build with powerpc64-unknown-linux-gnu-gcc (GCC 12.1.0).
The patch is applied on top of powerpc tree, next branch.
I got outside array bounds error:
CC arch/powerpc/kernel/dbell.o
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:3509:9:
arch/powerpc/lib/sstep.c:286:25: error: array subscript [3, 4] is outside array bounds of 'union <anonymous>[1]' [-Werror=array-bounds]
286 | up[0] = byterev_8(up[3]);
| ^~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:708:11: note: at offset [24, 39] into 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:3509:9:
arch/powerpc/lib/sstep.c:287:23: error: array subscript [3, 4] is outside array bounds of 'union <anonymous>[1]' [-Werror=array-bounds]
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 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:3509:9:
arch/powerpc/lib/sstep.c:288:23: error: array subscript 2 is outside array bounds of 'union <anonymous>[1]' [-Werror=array-bounds]
288 | tmp = byterev_8(up[2]);
| ^~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:708:11: note: at offset 16 into 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:3509:9:
arch/powerpc/lib/sstep.c:289:23: error: array subscript 2 is outside array bounds of 'union <anonymous>[1]' [-Werror=array-bounds]
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 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:3438:9:
arch/powerpc/lib/sstep.c:286:25: error: array subscript [3, 4] is outside array bounds of 'u8[16]' {aka 'unsigned char[16]'} [-Werror=array-bounds]
286 | up[0] = byterev_8(up[3]);
| ^~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into 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:3438:9:
arch/powerpc/lib/sstep.c:287:23: error: array subscript [3, 4] is outside array bounds of 'u8[16]' {aka 'unsigned char[16]'} [-Werror=array-bounds]
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 object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset [24, 39] into 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:3438:9:
arch/powerpc/lib/sstep.c:288:23: error: array subscript 2 is outside array bounds of 'u8[16]' {aka 'unsigned char[16]'} [-Werror=array-bounds]
288 | tmp = byterev_8(up[2]);
| ^~~~~~~~~~~~~~~~
arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into 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:3438:9:
arch/powerpc/lib/sstep.c:289:23: error: array subscript 2 is outside array bounds of 'u8[16]' {aka 'unsigned char[16]'} [-Werror=array-bounds]
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 object 'u' of size 16
681 | } u = {};
| ^
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
arch/powerpc/lib/sstep.c:681:11: note: at offset 16 into object 'u' of size 16
CC arch/powerpc/kernel/jump_label.o
cc1: all warnings being treated as errors
make[2]: *** [scripts/Makefile.build:271: arch/powerpc/lib/sstep.o] Error 1
These errors above are unrelated to the patch.
[1]: https://lore.kernel.org/linuxppc-dev/20220531065936.3674348-1-mpe@ellerman.id.au/
Thanks.
--
An old man doll... just what I always wanted! - Clara
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