From 9b8c7c14059af801637a818882159145c370d6f1 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 10 Oct 2018 17:18:25 -0700 Subject: LSM: Provide init debugging infrastructure Booting with "lsm.debug" will report future details on how LSM ordering decisions are being made. Signed-off-by: Kees Cook Reviewed-by: Casey Schaufler Reviewed-by: John Johansen Reviewed-by: James Morris Signed-off-by: James Morris --- security/security.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'security/security.c') diff --git a/security/security.c b/security/security.c index e74f46fba591..395f804f6a91 100644 --- a/security/security.c +++ b/security/security.c @@ -12,6 +12,8 @@ * (at your option) any later version. */ +#define pr_fmt(fmt) "LSM: " fmt + #include #include #include @@ -43,11 +45,19 @@ char *lsm_names; static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = CONFIG_DEFAULT_SECURITY; +static __initdata bool debug; +#define init_debug(...) \ + do { \ + if (debug) \ + pr_info(__VA_ARGS__); \ + } while (0) + static void __init major_lsm_init(void) { struct lsm_info *lsm; for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { + init_debug("initializing %s\n", lsm->name); lsm->init(); } } @@ -91,6 +101,14 @@ static int __init choose_lsm(char *str) } __setup("security=", choose_lsm); +/* Enable LSM order debugging. */ +static int __init enable_debug(char *str) +{ + debug = true; + return 1; +} +__setup("lsm.debug", enable_debug); + static bool match_last_lsm(const char *list, const char *lsm) { const char *last; -- cgit v1.2.3-59-g8ed1b