diff options
| author |   Ard Biesheuvel <ardb@kernel.org> | 2025-07-14 09:34:03 +0200 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2025-07-15 10:12:25 +0200 |
| commit | 6b995d01683feae619aa3263d18a6aa19bface16 (patch) | |
| tree | 05cd896e9c569dba4836e3f8fb71a9aa6a7d39b0 | |
| parent | Linux 6.16-rc6 (diff) | |
| download | wireguard-linux-6b995d01683feae619aa3263d18a6aa19bface16.tar.xz wireguard-linux-6b995d01683feae619aa3263d18a6aa19bface16.zip | |
x86/sev: Work around broken noinstr on GCC
Forcibly disable KCSAN for the sev-nmi.c source file, which only
contains functions annotated as 'noinstr' but is emitted with calls to
KCSAN instrumentation nonetheless. E.g.,
vmlinux.o: error: objtool: __sev_es_nmi_complete+0x58: call to __kcsan_check_access() leaves .noinstr.text section
make[2]: *** [/usr/local/google/home/ardb/linux/scripts/Makefile.vmlinux_o:72: vmlinux.o] Error 1
Fixes: a3cbbb4717e1 ("x86/boot: Move SEV startup code into startup/")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/20250714073402.4107091-2-ardb+git@google.com
| -rw-r--r-- | arch/x86/coco/sev/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/coco/sev/Makefile b/arch/x86/coco/sev/Makefile index db3255b979bd..342d79f0ab6a 100644 --- a/arch/x86/coco/sev/Makefile +++ b/arch/x86/coco/sev/Makefile @@ -5,5 +5,6 @@ obj-y += core.o sev-nmi.o vc-handle.o # Clang 14 and older may fail to respect __no_sanitize_undefined when inlining UBSAN_SANITIZE_sev-nmi.o := n -# GCC may fail to respect __no_sanitize_address when inlining +# GCC may fail to respect __no_sanitize_address or __no_kcsan when inlining KASAN_SANITIZE_sev-nmi.o := n +KCSAN_SANITIZE_sev-nmi.o := n |