[PATCH v2] 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 regular file permissions (0644). The executable bit
can trigger warnings in Debian's Lintian tool.

Explicitly remove the executable bit 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..276c3134a563 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 -x $@
 
 OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
 
-- 
2.51.0