[PATCH 5.10 301/390] ARM: decompressor: Include .data.rel.ro.local

From: Greg Kroah-Hartman
Date: Mon Oct 24 2022 - 10:17:46 EST


From: Kees Cook <keescook@xxxxxxxxxxxx>

[ Upstream commit 1b64daf413acd86c2c13f5443f6b4ef3690c8061 ]

The .data.rel.ro.local section has the same semantics as .data.rel.ro
here, so include it in the .rodata section of the decompressor.
Additionally since the .printk_index section isn't usable outside of
the core kernel, discard it in the decompressor. Avoids these warnings:

arm-linux-gnueabi-ld: warning: orphan section `.data.rel.ro.local' from `arch/arm/boot/compressed/fdt_rw.o' being placed in section `.data.rel.ro.local'
arm-linux-gnueabi-ld: warning: orphan section `.printk_index' from `arch/arm/boot/compressed/fdt_rw.o' being placed in section `.printk_index'

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/linux-mm/202209080545.qMIVj7YM-lkp@xxxxxxxxx
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/arm/boot/compressed/vmlinux.lds.S | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/compressed/vmlinux.lds.S b/arch/arm/boot/compressed/vmlinux.lds.S
index 1bcb68ac4b01..3fcb3e62dc56 100644
--- a/arch/arm/boot/compressed/vmlinux.lds.S
+++ b/arch/arm/boot/compressed/vmlinux.lds.S
@@ -23,6 +23,7 @@ SECTIONS
*(.ARM.extab*)
*(.note.*)
*(.rel.*)
+ *(.printk_index)
/*
* Discard any r/w data - this produces a link error if we have any,
* which is required for PIC decompression. Local data generates
@@ -57,6 +58,7 @@ SECTIONS
*(.rodata)
*(.rodata.*)
*(.data.rel.ro)
+ *(.data.rel.ro.*)
}
.piggydata : {
*(.piggydata)
--
2.35.1