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Nathan Chancellor 8678591b47
kbuild: Split .modinfo out from ELF_DETAILS 
Commit 3e86e4d74c ("kbuild: keep .modinfo section in
vmlinux.unstripped") added .modinfo to ELF_DETAILS while removing it
from COMMON_DISCARDS, as it was needed in vmlinux.unstripped and
ELF_DETAILS was present in all architecture specific vmlinux linker
scripts. While this shuffle is fine for vmlinux, ELF_DETAILS and
COMMON_DISCARDS may be used by other linker scripts, such as the s390
and x86 compressed boot images, which may not expect to have a .modinfo
section. In certain circumstances, this could result in a bootloader
failing to load the compressed kernel [1].

Commit ddc6cbef3e ("s390/boot/vmlinux.lds.S: Ensure bzImage ends with
SecureBoot trailer") recently addressed this for the s390 bzImage but
the same bug remains for arm, parisc, and x86. The presence of .modinfo
in the x86 bzImage was the root cause of the issue worked around with
commit d50f210913 ("kbuild: align modinfo section for Secureboot
Authenticode EDK2 compat"). misc.c in arch/x86/boot/compressed includes
lib/decompress_unzstd.c, which in turn includes lib/xxhash.c and its
MODULE_LICENSE / MODULE_DESCRIPTION macros due to the STATIC definition.

Split .modinfo out from ELF_DETAILS into its own macro and handle it in
all vmlinux linker scripts. Discard .modinfo in the places where it was
previously being discarded from being in COMMON_DISCARDS, as it has
never been necessary in those uses.

Cc: stable@vger.kernel.org
Fixes: 3e86e4d74c ("kbuild: keep .modinfo section in vmlinux.unstripped")
Reported-by: Ed W <lists@wildgooses.com>
Closes: https://lore.kernel.org/587f25e0-a80e-46a5-9f01-87cb40cfa377@wildgooses.com/ [1]
Tested-by: Ed W <lists@wildgooses.com> # x86_64
Link: https://patch.msgid.link/20260225-separate-modinfo-from-elf-details-v1-1-387ced6baf4b@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
2026-02-26 11:50:19 -07:00
..
boot ARC: migrate to the generic rule for built-in DTB 2025-01-18 08:52:09 +09:00
configs Use CONFIG_EXT4_FS instead of CONFIG_EXT3_FS in all of the defconfigs 2025-10-13 21:50:40 -04:00
include mm.git review status for linus..mm-stable 2026-02-12 11:32:37 -08:00
kernel kbuild: Split .modinfo out from ELF_DETAILS 2026-02-26 11:50:19 -07:00
lib ARCv2: memset: don't prefetch for len == 0 which happens a alot 2023-08-17 12:40:26 -07:00
mm arch, mm: consolidate initialization of nodes, zones and memory map 2026-01-26 20:02:18 -08:00
net Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
plat-axs10x arc: Explicitly include correct DT includes 2023-08-23 22:28:53 -07:00
plat-hsdk arc: Replace lkml.org links with lore 2021-12-28 19:48:49 -08:00
plat-sim ARC: merge HAPS-HS with nSIM-HS configs 2019-10-28 12:12:31 -07:00
plat-tb10x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
Kbuild ARC: Add eBPF JIT support 2024-05-12 16:51:36 -07:00
Kconfig ARC: Always use SWAPE instructions for __arch_swab32() 2026-01-30 16:46:17 +01:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile ARC: Always use SWAPE instructions for __arch_swab32() 2026-01-30 16:46:17 +01:00