The patch titled
Subject: module: panic: taint the kernel when selftest modules load
has been added to the -mm mm-nonmm-unstable branch. Its filename is
module-panic-taint-the-kernel-when-selftest-modules-load.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/module-panic-taint-the-kernel-when-selftest-modules-load.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: David Gow <davidgow@xxxxxxxxxx>
Subject: module: panic: taint the kernel when selftest modules load
Date: Sat, 2 Jul 2022 12:09:57 +0800
Taint the kernel with TAINT_TEST whenever a test module loads, by adding a
new "TEST" module property, and setting it for all modules in the
tools/testing directory. This property can also be set manually, for
tests which live outside the tools/testing directory with:
MODULE_INFO(test, "Y");
Link: https://lkml.kernel.org/r/20220702040959.3232874-2-davidgow@xxxxxxxxxx
Signed-off-by: David Gow <davidgow@xxxxxxxxxx>
Reviewed-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Reviewed-by: Aaron Tomlin <atomlin@xxxxxxxxxx>
Acked-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Daniel Latypov <dlatypov@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: John Ogness <john.ogness@xxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Michal Marek <michal.lkml@xxxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/module/main.c | 7 +++++++
scripts/mod/modpost.c | 3 +++
2 files changed, 10 insertions(+)
--- a/kernel/module/main.c~module-panic-taint-the-kernel-when-selftest-modules-load
+++ a/kernel/module/main.c
@@ -1988,6 +1988,13 @@ static int check_modinfo(struct module *
/* Set up license info based on the info section */
set_license(mod, get_modinfo(info, "license"));
+ if (!get_modinfo(info, "test")) {
+ if (!test_taint(TAINT_TEST))
+ pr_warn_once("%s: loading test module taints kernel.\n",
+ mod->name);
+ add_taint_module(mod, TAINT_TEST, LOCKDEP_STILL_OK);
+ }
+
return 0;
}
--- a/scripts/mod/modpost.c~module-panic-taint-the-kernel-when-selftest-modules-load
+++ a/scripts/mod/modpost.c
@@ -2191,6 +2191,9 @@ static void add_header(struct buffer *b,
if (strstarts(mod->name, "drivers/staging"))
buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
+
+ if (strstarts(mod->name, "tools/testing"))
+ buf_printf(b, "\nMODULE_INFO(test, \"Y\");\n");
}
static void add_exported_symbols(struct buffer *buf, struct module *mod)
_
Patches currently in -mm which might be from davidgow@xxxxxxxxxx are
panic-taint-kernel-if-tests-are-run.patch
module-panic-taint-the-kernel-when-selftest-modules-load.patch
kunit-taint-the-kernel-when-kunit-tests-are-run.patch
selftest-taint-kernel-when-test-module-loaded.patch
