From 8e5e13c8df9e6bc8f1e020f317caa6579ce6507f Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Wed, 8 Oct 2025 15:46:45 -0700 Subject: [PATCH] kbuild: Add '.rel.*' strip pattern for vmlinux [ Upstream commit 8ec3af916fe3954381cf3555ea03dc5adf4d0e8e ] Prior to binutils commit c12d9fa2afe ("Support objcopy --remove-section=.relaFOO") [1] in 2.32, stripping relocation sections required the trailing period (i.e., '.rel.*') to work properly. After commit 3e86e4d74c04 ("kbuild: keep .modinfo section in vmlinux.unstripped"), there is an error with binutils 2.31.1 or earlier because these sections are not properly removed: s390-linux-objcopy: st6tO8Ev: symbol `.modinfo' required but not present s390-linux-objcopy:st6tO8Ev: no symbols Add the old pattern to resolve this issue (along with a comment to allow cleaning this when binutils 2.32 or newer is the minimum supported version). While the aforementioned kbuild change exposes this, the pattern was originally changed by commit 71d815bf5dfd ("kbuild: Strip runtime const RELA sections correctly"), where it would still be incorrect with binutils older than 2.32. Fixes: 71d815bf5dfd ("kbuild: Strip runtime const RELA sections correctly") Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c12d9fa2afe7abcbe407a00e15719e1a1350c2a7 [1] Reported-by: Linux Kernel Functional Testing Closes: https://lore.kernel.org/CA+G9fYvVktRhFtZXdNgVOL8j+ArsJDpvMLgCitaQvQmCx=hwOQ@mail.gmail.com/ Acked-by: Ard Biesheuvel Acked-by: Alexey Gladkov Acked-by: Nicolas Schier Link: https://patch.msgid.link/20251008-kbuild-fix-modinfo-regressions-v1-2-9fc776c5887c@kernel.org Signed-off-by: Nathan Chancellor Signed-off-by: Sasha Levin --- scripts/Makefile.vmlinux | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux index 7c6f0e882eab..ffc7b49e54f7 100644 --- a/scripts/Makefile.vmlinux +++ b/scripts/Makefile.vmlinux @@ -88,6 +88,9 @@ endif remove-section-y := .modinfo remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*' '!.rel*.dyn' +# for compatibility with binutils < 2.32 +# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c12d9fa2afe7abcbe407a00e15719e1a1350c2a7 +remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel.*' # To avoid warnings: "empty loadable segment detected at ..." from GNU objcopy, # it is necessary to remove the PT_LOAD flag from the segment.