6.18-stable review patch. If anyone has any objections, please let me know.
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From: Mikhail Malyshev mike.malyshev@gmail.com
[ Upstream commit af61da281f52aba0c5b090bafb3a31c5739850ff ]
When building out-of-tree modules with CONFIG_MODULE_SIG_FORCE=y, module signing fails because the private key path uses $(srctree) while the public key path uses $(objtree). Since signing keys are generated in the build directory during kernel compilation, both paths should use $(objtree) for consistency.
This causes SSL errors like: SSL error:02001002:system library:fopen:No such file or directory sign-file: /kernel-src/certs/signing_key.pem
The issue occurs because: - sig-key uses: $(srctree)/certs/signing_key.pem (source tree) - cmd_sign uses: $(objtree)/certs/signing_key.x509 (build tree)
But both keys are generated in $(objtree) during the build.
This complements commit 25ff08aa43e37 ("kbuild: Fix signing issue for external modules") which fixed the scripts path and public key path, but missed the private key path inconsistency.
Fixes out-of-tree module signing for configurations with separate source and build directories (e.g., O=/kernel-out).
Signed-off-by: Mikhail Malyshev mike.malyshev@gmail.com Reviewed-by: Nathan Chancellor nathan@kernel.org Tested-by: Nicolas Schier nsc@kernel.org Link: https://patch.msgid.link/20251015163452.3754286-1-mike.malyshev@gmail.com Signed-off-by: Nicolas Schier nsc@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- scripts/Makefile.modinst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst index 1628198f3e830..9ba45e5b32b18 100644 --- a/scripts/Makefile.modinst +++ b/scripts/Makefile.modinst @@ -100,7 +100,7 @@ endif # Don't stop modules_install even if we can't sign external modules. # ifeq ($(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),) -sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(srctree)/)$(CONFIG_MODULE_SIG_KEY) +sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(objtree)/)$(CONFIG_MODULE_SIG_KEY) else sig-key := $(CONFIG_MODULE_SIG_KEY) endif