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ANDROID: add MODULE_SIG_PROTECT and MODULE_SIG_PROTECT_LIST options

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MODULE_SIG_PROTECT_LIST - list of modules whose exports to protect

MODULE_SIG_PROTECT - readonly, set automatically based on the value of
MODULE_SIG_PROTECT_LIST; used for determining whether symbol exportion
is enabled in scripts, Makefiles and preprocessor directives

Bug: 393366754
Change-Id: I70bb82c24dcd18de5bb3db4924acca5799539fc9
Signed-off-by: Sid Nayyar <sidnayyar@google.com>
This commit is contained in:
Sid Nayyar
2025-01-30 11:22:26 -08:00
parent 255e2003ee
commit 54bfd8db38
1 changed files with 18 additions and 0 deletions
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kernel/module/Kconfig
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@@ -297,6 +297,24 @@ config MODULE_SIG_ALL
comment "Do not forget to sign required modules with scripts/sign-file" comment "Do not forget to sign required modules with scripts/sign-file"
depends on MODULE_SIG_FORCE && !MODULE_SIG_ALL depends on MODULE_SIG_FORCE && !MODULE_SIG_ALL
config MODULE_SIG_PROTECT_LIST
string "File with signed module names whose exports are to be protected"
default ""
depends on MODULE_SIG && !MODULE_SIG_FORCE
help
Enables symbol export protection support for the listed signed
modules. This option prevents unsigned modules from exporting symbols
which are exported by the listed modules. Any unsigned module which
tries to export such a symbol will fail to load.
The value to set here is the path to a text file in the source
directory containing the list of module names, one per line. The path
can be absolute, or relative to the kernel source or obj tree.
config MODULE_SIG_PROTECT
def_bool y
depends on MODULE_SIG_PROTECT_LIST != ""
choice choice
prompt "Hash algorithm to sign modules" prompt "Hash algorithm to sign modules"
depends on MODULE_SIG || IMA_APPRAISE_MODSIG depends on MODULE_SIG || IMA_APPRAISE_MODSIG