Re: [PATCH v2] kbuild: Install dtb files as 0644 in Makefile.dtbinst

From: Dragan Simic
Date: Mon Jun 10 2024 - 20:51:38 EST


Hello Masahiro,

On 2024-06-11 00:29, Masahiro Yamada wrote:
On Mon, Jun 10, 2024 at 2:21 PM Dragan Simic <dsimic@xxxxxxxxxxx> wrote:

The compiled dtb files aren't executable, so install them with 0644 as their
permission mode, instead of defaulting to 0755 for the permission mode and
installing them with the executable bits set.

Some Linux distributions, including Debian, [1][2][3] already include fixes
in their kernel package build recipes to change the dtb file permissions to
0644 in their kernel packages. These changes, when additionally propagated
into the long-term kernel versions, will allow such distributions to remove
their downstream fixes.

[1] https://salsa.debian.org/kernel-team/linux/-/merge_requests/642
[2] https://salsa.debian.org/kernel-team/linux/-/merge_requests/749
[3] https://salsa.debian.org/kernel-team/linux/-/blob/master/debian/rules.real?ref_type=heads#L193

The 'master' is a moving target.

The line 193 in the future may not point to the correct position

I changed it to this.

[3] https://salsa.debian.org/kernel-team/linux/-/blob/debian/6.8.12-1/debian/rules.real#L193

This references the line 193 from the 'debian/6.8.12-1' tag.

Good point, it preserves this reference for the future. The same
thoughts crossed my mind after I sent the patch, but I didn't want
to make noise about it. Thanks for the fix.

Applied to linux-kbuild.
Thanks!

Great, thanks!

Cc: Diederik de Haas <didi.debian@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: aefd80307a05 ("kbuild: refactor Makefile.dtbinst more")
Signed-off-by: Dragan Simic <dsimic@xxxxxxxxxxx>
---

Notes:
Changes in v2:
- Improved the patch description, to include additional details and
to address the patch submission issues pointed out by Greg K-H [4]
- No changes were made to the patch itself

Link to v1: https://lore.kernel.org/linux-kbuild/ae087ef1715142f606ba6477ace3e4111972cf8b.1717961381.git.dsimic@xxxxxxxxxxx/T/#u

[4] https://lore.kernel.org/linux-kbuild/2024061006-ladylike-paving-a36b@gregkh/

scripts/Makefile.dtbinst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
index 67956f6496a5..9d920419a62c 100644
--- a/scripts/Makefile.dtbinst
+++ b/scripts/Makefile.dtbinst
@@ -17,7 +17,7 @@ include $(srctree)/scripts/Kbuild.include
dst := $(INSTALL_DTBS_PATH)

quiet_cmd_dtb_install = INSTALL $@
- cmd_dtb_install = install -D $< $@
+ cmd_dtb_install = install -D -m 0644 $< $@

$(dst)/%: $(obj)/%
$(call cmd,dtb_install)