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module: panic: Taint the kernel when selftest modules load

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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");

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow 2022-07-08 12:48:45 +08:00 committed by Shuah Khan
parent 77ce8ba3f0
commit 74829ddf59
2 changed files with 10 additions and 0 deletions
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7
kernel/module/main.c
View File

@ -1988,6 +1988,13 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags)
/* 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("%s: loading test module taints kernel.\n",
mod->name);
add_taint_module(mod, TAINT_TEST, LOCKDEP_STILL_OK);
}
return 0;
}

3
scripts/mod/modpost.c
View File

@ -2191,6 +2191,9 @@ static void add_header(struct buffer *b, struct module *mod)
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)