This is a note to let you know that I've just added the patch titled
riscv/efistub: Ensure GP-relative addressing is not used
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
riscv-efistub-ensure-gp-relative-addressing-is-not-used.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From afb2a4fb84555ef9e61061f6ea63ed7087b295d5 Mon Sep 17 00:00:00 2001
From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Date: Fri, 12 Jan 2024 19:37:29 +0100
Subject: riscv/efistub: Ensure GP-relative addressing is not used
From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
commit afb2a4fb84555ef9e61061f6ea63ed7087b295d5 upstream.
The cflags for the RISC-V efistub were missing -mno-relax, thus were
under the risk that the compiler could use GP-relative addressing. That
happened for _edata with binutils-2.41 and kernel 6.1, causing the
relocation to fail due to an invalid kernel_size in handle_kernel_image.
It was not yet observed with newer versions, but that may just be luck.
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/efi/libstub/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -28,7 +28,7 @@ cflags-$(CONFIG_ARM) += -DEFI_HAVE_STRL
-DEFI_HAVE_MEMCHR -DEFI_HAVE_STRRCHR \
-DEFI_HAVE_STRCMP -fno-builtin -fpic \
$(call cc-option,-mno-single-pic-base)
-cflags-$(CONFIG_RISCV) += -fpic
+cflags-$(CONFIG_RISCV) += -fpic -mno-relax
cflags-$(CONFIG_LOONGARCH) += -fpie
cflags-$(CONFIG_EFI_PARAMS_FROM_FDT) += -I$(srctree)/scripts/dtc/libfdt
Patches currently in stable-queue which might be from jan.kiszka@xxxxxxxxxxx are
queue-6.6/riscv-efistub-ensure-gp-relative-addressing-is-not-used.patch
