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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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73f62e60d8
It's long been annoying that to add a new LKDTM test one had to update lkdtm.h and core.c to get it "registered". Switch to a per-category list and update the crashtype walking code in core.c to handle it. This also means that all the lkdtm_* tests themselves can be static now. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kees Cook <keescook@chromium.org>
100 lines
3 KiB
C
100 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LKDTM_H
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#define __LKDTM_H
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#define pr_fmt(fmt) "lkdtm: " fmt
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#include <linux/kernel.h>
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extern char *lkdtm_kernel_info;
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#define pr_expected_config(kconfig) \
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do { \
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if (IS_ENABLED(kconfig)) \
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pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \
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lkdtm_kernel_info); \
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else \
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pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \
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lkdtm_kernel_info); \
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} while (0)
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#ifndef MODULE
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int lkdtm_check_bool_cmdline(const char *param);
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#define pr_expected_config_param(kconfig, param) \
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do { \
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if (IS_ENABLED(kconfig)) { \
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switch (lkdtm_check_bool_cmdline(param)) { \
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case 0: \
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pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \
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lkdtm_kernel_info); \
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break; \
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case 1: \
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pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \
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lkdtm_kernel_info); \
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break; \
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default: \
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pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \
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lkdtm_kernel_info); \
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} \
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} else { \
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switch (lkdtm_check_bool_cmdline(param)) { \
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case 0: \
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pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \
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lkdtm_kernel_info); \
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break; \
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case 1: \
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pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \
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lkdtm_kernel_info); \
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break; \
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default: \
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pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \
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lkdtm_kernel_info); \
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break; \
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} \
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} \
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} while (0)
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#else
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#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)
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#endif
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/* Crash types. */
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struct crashtype {
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const char *name;
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void (*func)(void);
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};
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#define CRASHTYPE(_name) \
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{ \
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.name = __stringify(_name), \
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.func = lkdtm_ ## _name, \
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}
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/* Category's collection of crashtypes. */
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struct crashtype_category {
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struct crashtype *crashtypes;
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size_t len;
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};
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/* Each category's crashtypes list. */
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extern struct crashtype_category bugs_crashtypes;
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extern struct crashtype_category heap_crashtypes;
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extern struct crashtype_category perms_crashtypes;
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extern struct crashtype_category refcount_crashtypes;
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extern struct crashtype_category usercopy_crashtypes;
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extern struct crashtype_category stackleak_crashtypes;
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extern struct crashtype_category cfi_crashtypes;
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extern struct crashtype_category fortify_crashtypes;
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extern struct crashtype_category powerpc_crashtypes;
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/* Each category's init/exit routines. */
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void __init lkdtm_bugs_init(int *recur_param);
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void __init lkdtm_heap_init(void);
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void __exit lkdtm_heap_exit(void);
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void __init lkdtm_perms_init(void);
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void __init lkdtm_usercopy_init(void);
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void __exit lkdtm_usercopy_exit(void);
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/* Special declaration for function-in-rodata. */
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void lkdtm_rodata_do_nothing(void);
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#endif
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