diff options
| author | Kees Cook <keescook@chromium.org> | 2021-06-23 23:39:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-24 16:32:08 +0300 |
| commit | 5b777131bd8005acaf7e9d6e7690214155f42890 (patch) | |
| tree | 4b3e3a8e9964132b55e5d9fc56ca91e8cea9d7dd /drivers/misc/lkdtm/lkdtm.h | |
| parent | f123c42bbeff26bfe8bdb08a01307e92d51eec39 (diff) | |
| download | linux-5b777131bd8005acaf7e9d6e7690214155f42890.tar.xz | |
lkdtm: Add CONFIG hints in errors where possible
For various failure conditions, try to include some details about where
to look for reasons about the failure.
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210623203936.3151093-8-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/lkdtm/lkdtm.h')
| -rw-r--r-- | drivers/misc/lkdtm/lkdtm.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h index c6baf4f1e1db..e491bc571808 100644 --- a/drivers/misc/lkdtm/lkdtm.h +++ b/drivers/misc/lkdtm/lkdtm.h @@ -6,6 +6,47 @@ #include <linux/kernel.h> +#define pr_expected_config(kconfig) \ +{ \ + if (IS_ENABLED(kconfig)) \ + pr_err("Unexpected! This kernel was built with " #kconfig "=y\n"); \ + else \ + pr_warn("This is probably expected, since this kernel was built *without* " #kconfig "=y\n"); \ +} + +#ifndef MODULE +int lkdtm_check_bool_cmdline(const char *param); +#define pr_expected_config_param(kconfig, param) \ +{ \ + if (IS_ENABLED(kconfig)) { \ + switch (lkdtm_check_bool_cmdline(param)) { \ + case 0: \ + pr_warn("This is probably expected, since this kernel was built with " #kconfig "=y but booted with '" param "=N'\n"); \ + break; \ + case 1: \ + pr_err("Unexpected! This kernel was built with " #kconfig "=y and booted with '" param "=Y'\n"); \ + break; \ + default: \ + pr_err("Unexpected! This kernel was built with " #kconfig "=y (and booted without '" param "' specified)\n"); \ + } \ + } else { \ + switch (lkdtm_check_bool_cmdline(param)) { \ + case 0: \ + pr_warn("This is probably expected, as kernel was built *without* " #kconfig "=y and booted with '" param "=N'\n"); \ + break; \ + case 1: \ + pr_err("Unexpected! This kernel was built *without* " #kconfig "=y but booted with '" param "=Y'\n"); \ + break; \ + default: \ + pr_err("This is probably expected, since this kernel was built *without* " #kconfig "=y (and booted without '" param "' specified)\n"); \ + break; \ + } \ + } \ +} +#else +#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig) +#endif + /* bugs.c */ void __init lkdtm_bugs_init(int *recur_param); void lkdtm_PANIC(void); |