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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 25ff08aa43 ("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>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.