[PATCH] kbuild: Fix permissions of modules.builtin.modinfo

[Ethan Zuo]

Currently, modules.builtin.modinfo is created with executable permissions
(0755). This is because after commit 39cfd5b12160 ("kbuild: extract
modules.builtin.modinfo from vmlinux.unstripped"), modules.builtin.modinfo
is extracted from vmlinux.unstripped using objcopy. When extracting
sections, objcopy inherits attributes from the source ELF file.

Since modules.builtin.modinfo is a data file and not an executable,
it should have 0644 permissions. The executable bit can trigger
warnings in Debian's Lintian tool.

Explicitly set the permissions to 0644 after generation.

Fixes: 39cfd5b12160 ("kbuild: extract modules.builtin.modinfo from vmlinux.unstripped")
Signed-off-by: Ethan Zuo <yuxuan.zuo@xxxxxxxxxxx>
---
 scripts/Makefile.vmlinux | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux
index cd788cac9d91..c5305619b1d3 100644
--- a/scripts/Makefile.vmlinux
+++ b/scripts/Makefile.vmlinux
@@ -113,7 +113,8 @@ vmlinux: vmlinux.unstripped FORCE
 # what kmod expects to parse.
 quiet_cmd_modules_builtin_modinfo = GEN     $@
       cmd_modules_builtin_modinfo = $(cmd_objcopy); \
-                                    sed -i 's/\x00\+$$/\x00/g' $@
+                                    sed -i 's/\x00\+$$/\x00/g' $@; \
+                                    chmod 644 $@
 
 OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
 
-- 
2.51.0