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| author |   John Johansen <john.johansen@canonical.com> | 2017-01-16 00:42:27 -0800 |
|---|---|---|
| committer | John Johansen <john.johansen@canonical.com> | 2017-01-16 01:18:24 -0800 |
| commit | 680cd62e910d7b7e3c1fcde6ba67c6ca770c2286 (patch) | |
| tree | 76730905bf9676fefb5070d908a13085ebb32394 | |
| parent | apparmor: add macro for bug asserts to check that a lock is held (diff) | |
| download | linux-dev-680cd62e910d7b7e3c1fcde6ba67c6ca770c2286.tar.xz linux-dev-680cd62e910d7b7e3c1fcde6ba67c6ca770c2286.zip | |
apparmor: add debug assert AA_BUG and Kconfig to control debug info
Signed-off-by: John Johansen <john.johansen@canonical.com>
| -rw-r--r-- | security/apparmor/Kconfig | 31 | ||||
| -rw-r--r-- | security/apparmor/include/lib.h | 14 | ||||
| -rw-r--r-- | security/apparmor/lsm.c | 2 |
3 files changed, 43 insertions, 4 deletions
diff --git a/security/apparmor/Kconfig b/security/apparmor/Kconfig index be5e9414a295..b6b68a7750ce 100644 --- a/security/apparmor/Kconfig +++ b/security/apparmor/Kconfig @@ -36,7 +36,6 @@ config SECURITY_APPARMOR_HASH select CRYPTO select CRYPTO_SHA1 default y - help This option selects whether introspection of loaded policy is available to userspace via the apparmor filesystem. @@ -45,7 +44,6 @@ config SECURITY_APPARMOR_HASH_DEFAULT bool "Enable policy hash introspection by default" depends on SECURITY_APPARMOR_HASH default y - help This option selects whether sha1 hashing of loaded policy is enabled by default. The generation of sha1 hashes for @@ -54,3 +52,32 @@ config SECURITY_APPARMOR_HASH_DEFAULT however it can slow down policy load on some devices. In these cases policy hashing can be disabled by default and enabled only if needed. + +config SECURITY_APPARMOR_DEBUG + bool "Build AppArmor with debug code" + depends on SECURITY_APPARMOR + default n + help + Build apparmor with debugging logic in apparmor. Not all + debugging logic will necessarily be enabled. A submenu will + provide fine grained control of the debug options that are + available. + +config SECURITY_APPARMOR_DEBUG_ASSERTS + bool "Build AppArmor with debugging asserts" + depends on SECURITY_APPARMOR_DEBUG + default y + help + Enable code assertions made with AA_BUG. These are primarily + function entry preconditions but also exist at other key + points. If the assert is triggered it will trigger a WARN + message. + +config SECURITY_APPARMOR_DEBUG_MESSAGES + bool "Debug messages enabled by default" + depends on SECURITY_APPARMOR_DEBUG + default n + help + Set the default value of the apparmor.debug kernel parameter. + When enabled, various debug messages will be logged to + the kernel message buffer. diff --git a/security/apparmor/include/lib.h b/security/apparmor/include/lib.h index 61dedd7333df..d507c73ac9b8 100644 --- a/security/apparmor/include/lib.h +++ b/security/apparmor/include/lib.h @@ -35,12 +35,24 @@ * which is not related to profile accesses. */ +#define DEBUG_ON (aa_g_debug) +#define dbg_printk(__fmt, __args...) pr_debug(__fmt, ##__args) #define AA_DEBUG(fmt, args...) \ do { \ - if (aa_g_debug) \ + if (DEBUG_ON) \ pr_debug_ratelimited("AppArmor: " fmt, ##args); \ } while (0) +#define AA_WARN(X) WARN((X), "APPARMOR WARN %s: %s\n", __func__, #X) + +#define AA_BUG(X, args...) AA_BUG_FMT((X), "" args) +#ifdef CONFIG_SECURITY_APPARMOR_DEBUG_ASSERTS +#define AA_BUG_FMT(X, fmt, args...) \ + WARN((X), "AppArmor WARN %s: (" #X "): " fmt, __func__, ##args) +#else +#define AA_BUG_FMT(X, fmt, args...) +#endif + #define AA_ERROR(fmt, args...) \ pr_err_ratelimited("AppArmor: " fmt, ##args) diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 1dae66ba757b..99a6e5ec4ffe 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -681,7 +681,7 @@ module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); #endif /* Debug mode */ -bool aa_g_debug; +bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_DEBUG_MESSAGES); module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); /* Audit mode */ |