linux-kernel - Re: Build regressions/improvements in v6.2-rc1

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Message-ID: <alpine.DEB.2.22.394.2212270933530.311423@ramsan.of.borg>
Date:   Tue, 27 Dec 2022 09:35:16 +0100 (CET)
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     linux-kernel@...r.kernel.org
cc:     amd-gfx@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-wireless@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linuxppc-dev@...ts.ozlabs.org, kasan-dev@...glegroups.com,
        linux-xtensa@...ux-xtensa.org
Subject: Re: Build regressions/improvements in v6.2-rc1

On Tue, 27 Dec 2022, Geert Uytterhoeven wrote:
> Below is the list of build error/warning regressions/improvements in
> v6.2-rc1[1] compared to v6.1[2].
>
> Summarized:
>  - build errors: +11/-13

amd-gfx@...ts.freedesktop.org
linux-arm-kernel@...ts.infradead.org
linux-media@...r.kernel.org
linux-wireless@...r.kernel.org
linux-mips@...r.kernel.org
linux-sh@...r.kernel.org
linux-f2fs-devel@...ts.sourceforge.net
linuxppc-dev@...ts.ozlabs.org
kasan-dev@...glegroups.com
linux-xtensa@...ux-xtensa.org

   + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn31/display_mode_vba_31.c: error: the frame size of 2224 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]:  => 7082:1
   + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn314/display_mode_vba_314.c: error: the frame size of 2208 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]:  => 7127:1

arm64-gcc5/arm64-allmodconfig

   + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 2 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28
   + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 3 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28

m68k-gcc8/m68k-allmodconfig
See also https://lore.kernel.org/all/CAMuHMdWpPX2mpqFEWjjbjsQvDBQOXyjjdpKnQu9qURAuVZXmMw@mail.gmail.com

   + /kisskb/src/include/linux/bitfield.h: error: call to '__field_overflow' declared with attribute error: value doesn't fit into mask:  => 151:3

In function 'u32_encode_bits',
     inlined from 'ieee80211_mlo_multicast_tx' at /kisskb/src/net/mac80211/tx.c:4435:17,
     inlined from 'ieee80211_subif_start_xmit' at /kisskb/src/net/mac80211/tx.c:4483:3:

mipsel-gcc5/mips-allmodconfig

   + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_262' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45
   + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_263' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45

In function 'follow_pmd_mask',
     inlined from 'follow_pud_mask' at /kisskb/src/mm/gup.c:735:9,
     inlined from 'follow_p4d_mask' at /kisskb/src/mm/gup.c:752:9,
     inlined from 'follow_page_mask' at /kisskb/src/mm/gup.c:809:9:

sh4-gcc11/sh-defconfig (Günter wondered if pmd_t should use union)

   + /kisskb/src/include/linux/fortify-string.h: error: '__builtin_memcpy' offset [0, 127] is out of the bounds [0, 0] [-Werror=array-bounds]:  => 57:33

/kisskb/src/arch/s390/kernel/setup.c: In function 'setup_lowcore_dat_on':
s390x-gcc11/s390-all{mod,yes}config

   + /kisskb/src/include/linux/fortify-string.h: error: '__builtin_memset' pointer overflow between offset [28, 898293814] and size [-898293787, -1] [-Werror=array-bounds]:  => 59:33

/kisskb/src/fs/f2fs/inline.c: In function 'f2fs_move_inline_dirents':

powerpc-gcc11/ppc64_book3e_allmodconfig
powerpc-gcc11/powerpc-all{mod,yes}config

   + /kisskb/src/kernel/kcsan/kcsan_test.c: error: the frame size of 1680 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 257:1

xtensa-gcc11/xtensa-allmodconfig (patch available)

   + {standard input}: Error: unknown pseudo-op: `.cfi_def_c':  => 1718

sh4-gcc11/sh-allmodconfig (ICE = internal compiler error)

> [1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/1b929c02afd37871d5afb9d498426f83432e71c2/ (all 152 configs)
> [2] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/830b3c68c1fb1e9176028d02ef86f3cf76aa2476/ (all 152 configs)

Gr{oetje,eeting}s,

 						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
 							    -- Linus Torvalds