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59a12205d3
Introduce lkdtm tests for NULL pointer dereference: check access or exec
at NULL address, since these errors tend to be reported differently from
the general fault error text. For example from x86:
pr_alert("BUG: unable to handle kernel %s at %px\n",
address < PAGE_SIZE ? "NULL pointer dereference" : "paging request",
(void *)address);
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Kees Cook <keescook@chromium.org>
93 lines
2.8 KiB
C
93 lines
2.8 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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/* lkdtm_bugs.c */
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void __init lkdtm_bugs_init(int *recur_param);
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void lkdtm_PANIC(void);
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void lkdtm_BUG(void);
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void lkdtm_WARNING(void);
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void lkdtm_EXCEPTION(void);
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void lkdtm_LOOP(void);
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void lkdtm_OVERFLOW(void);
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void lkdtm_CORRUPT_STACK(void);
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void lkdtm_CORRUPT_STACK_STRONG(void);
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void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void);
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void lkdtm_SOFTLOCKUP(void);
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void lkdtm_HARDLOCKUP(void);
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void lkdtm_SPINLOCKUP(void);
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void lkdtm_HUNG_TASK(void);
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void lkdtm_CORRUPT_LIST_ADD(void);
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void lkdtm_CORRUPT_LIST_DEL(void);
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void lkdtm_CORRUPT_USER_DS(void);
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void lkdtm_STACK_GUARD_PAGE_LEADING(void);
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void lkdtm_STACK_GUARD_PAGE_TRAILING(void);
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/* lkdtm_heap.c */
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void lkdtm_OVERWRITE_ALLOCATION(void);
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void lkdtm_WRITE_AFTER_FREE(void);
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void lkdtm_READ_AFTER_FREE(void);
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void lkdtm_WRITE_BUDDY_AFTER_FREE(void);
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void lkdtm_READ_BUDDY_AFTER_FREE(void);
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/* lkdtm_perms.c */
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void __init lkdtm_perms_init(void);
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void lkdtm_WRITE_RO(void);
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void lkdtm_WRITE_RO_AFTER_INIT(void);
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void lkdtm_WRITE_KERN(void);
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void lkdtm_EXEC_DATA(void);
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void lkdtm_EXEC_STACK(void);
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void lkdtm_EXEC_KMALLOC(void);
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void lkdtm_EXEC_VMALLOC(void);
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void lkdtm_EXEC_RODATA(void);
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void lkdtm_EXEC_USERSPACE(void);
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void lkdtm_EXEC_NULL(void);
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void lkdtm_ACCESS_USERSPACE(void);
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void lkdtm_ACCESS_NULL(void);
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/* lkdtm_refcount.c */
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void lkdtm_REFCOUNT_INC_OVERFLOW(void);
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void lkdtm_REFCOUNT_ADD_OVERFLOW(void);
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void lkdtm_REFCOUNT_INC_NOT_ZERO_OVERFLOW(void);
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void lkdtm_REFCOUNT_ADD_NOT_ZERO_OVERFLOW(void);
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void lkdtm_REFCOUNT_DEC_ZERO(void);
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void lkdtm_REFCOUNT_DEC_NEGATIVE(void);
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void lkdtm_REFCOUNT_DEC_AND_TEST_NEGATIVE(void);
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void lkdtm_REFCOUNT_SUB_AND_TEST_NEGATIVE(void);
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void lkdtm_REFCOUNT_INC_ZERO(void);
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void lkdtm_REFCOUNT_ADD_ZERO(void);
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void lkdtm_REFCOUNT_INC_SATURATED(void);
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void lkdtm_REFCOUNT_DEC_SATURATED(void);
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void lkdtm_REFCOUNT_ADD_SATURATED(void);
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void lkdtm_REFCOUNT_INC_NOT_ZERO_SATURATED(void);
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void lkdtm_REFCOUNT_ADD_NOT_ZERO_SATURATED(void);
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void lkdtm_REFCOUNT_DEC_AND_TEST_SATURATED(void);
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void lkdtm_REFCOUNT_SUB_AND_TEST_SATURATED(void);
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void lkdtm_REFCOUNT_TIMING(void);
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void lkdtm_ATOMIC_TIMING(void);
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/* lkdtm_rodata.c */
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void lkdtm_rodata_do_nothing(void);
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/* lkdtm_usercopy.c */
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void __init lkdtm_usercopy_init(void);
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void __exit lkdtm_usercopy_exit(void);
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void lkdtm_USERCOPY_HEAP_SIZE_TO(void);
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void lkdtm_USERCOPY_HEAP_SIZE_FROM(void);
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void lkdtm_USERCOPY_HEAP_WHITELIST_TO(void);
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void lkdtm_USERCOPY_HEAP_WHITELIST_FROM(void);
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void lkdtm_USERCOPY_STACK_FRAME_TO(void);
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void lkdtm_USERCOPY_STACK_FRAME_FROM(void);
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void lkdtm_USERCOPY_STACK_BEYOND(void);
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void lkdtm_USERCOPY_KERNEL(void);
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void lkdtm_USERCOPY_KERNEL_DS(void);
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/* lkdtm_stackleak.c */
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void lkdtm_STACKLEAK_ERASING(void);
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#endif
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