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Message-Id: <20220412232226.4014907-1-keescook@chromium.org>
Date: Tue, 12 Apr 2022 16:22:26 -0700
From: Kees Cook <keescook@...omium.org>
To: Arnd Bergmann <arnd@...db.de>
Cc: Kees Cook <keescook@...omium.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: [PATCH] lkdtm: Move crashtype definitions into each category
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@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
Greg, please don't take this yet, it depends on the rest of my lkdtm
series that I'll send you a -next pull request for soon.
---
drivers/misc/lkdtm/bugs.c | 86 +++++++++++++-------
drivers/misc/lkdtm/cfi.c | 11 ++-
drivers/misc/lkdtm/core.c | 138 ++++++++-------------------------
drivers/misc/lkdtm/fortify.c | 17 +++-
drivers/misc/lkdtm/heap.c | 41 +++++++---
drivers/misc/lkdtm/lkdtm.h | 134 ++++++++------------------------
drivers/misc/lkdtm/perms.c | 47 +++++++----
drivers/misc/lkdtm/powerpc.c | 11 ++-
drivers/misc/lkdtm/refcount.c | 65 +++++++++++-----
drivers/misc/lkdtm/stackleak.c | 11 ++-
drivers/misc/lkdtm/usercopy.c | 32 ++++++--
11 files changed, 301 insertions(+), 292 deletions(-)
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c
index 8cb342c562af..009239ad1d8a 100644
--- a/drivers/misc/lkdtm/bugs.c
+++ b/drivers/misc/lkdtm/bugs.c
@@ -68,40 +68,40 @@ void __init lkdtm_bugs_init(int *recur_param)
recur_count = *recur_param;
}
-void lkdtm_PANIC(void)
+static void lkdtm_PANIC(void)
{
panic("dumptest");
}
-void lkdtm_BUG(void)
+static void lkdtm_BUG(void)
{
BUG();
}
static int warn_counter;
-void lkdtm_WARNING(void)
+static void lkdtm_WARNING(void)
{
WARN_ON(++warn_counter);
}
-void lkdtm_WARNING_MESSAGE(void)
+static void lkdtm_WARNING_MESSAGE(void)
{
WARN(1, "Warning message trigger count: %d\n", ++warn_counter);
}
-void lkdtm_EXCEPTION(void)
+static void lkdtm_EXCEPTION(void)
{
*((volatile int *) 0) = 0;
}
-void lkdtm_LOOP(void)
+static void lkdtm_LOOP(void)
{
for (;;)
;
}
-void lkdtm_EXHAUST_STACK(void)
+static void lkdtm_EXHAUST_STACK(void)
{
pr_info("Calling function with %lu frame size to depth %d ...\n",
REC_STACK_SIZE, recur_count);
@@ -115,7 +115,7 @@ static noinline void __lkdtm_CORRUPT_STACK(void *stack)
}
/* This should trip the stack canary, not corrupt the return address. */
-noinline void lkdtm_CORRUPT_STACK(void)
+static noinline void lkdtm_CORRUPT_STACK(void)
{
/* Use default char array length that triggers stack protection. */
char data[8] __aligned(sizeof(void *));
@@ -125,7 +125,7 @@ noinline void lkdtm_CORRUPT_STACK(void)
}
/* Same as above but will only get a canary with -fstack-protector-strong */
-noinline void lkdtm_CORRUPT_STACK_STRONG(void)
+static noinline void lkdtm_CORRUPT_STACK_STRONG(void)
{
union {
unsigned short shorts[4];
@@ -139,7 +139,7 @@ noinline void lkdtm_CORRUPT_STACK_STRONG(void)
static pid_t stack_pid;
static unsigned long stack_addr;
-void lkdtm_REPORT_STACK(void)
+static void lkdtm_REPORT_STACK(void)
{
volatile uintptr_t magic;
pid_t pid = task_pid_nr(current);
@@ -222,7 +222,7 @@ static noinline void __lkdtm_REPORT_STACK_CANARY(void *stack)
}
}
-void lkdtm_REPORT_STACK_CANARY(void)
+static void lkdtm_REPORT_STACK_CANARY(void)
{
/* Use default char array length that triggers stack protection. */
char data[8] __aligned(sizeof(void *)) = { };
@@ -230,7 +230,7 @@ void lkdtm_REPORT_STACK_CANARY(void)
__lkdtm_REPORT_STACK_CANARY((void *)&data);
}
-void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void)
+static void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void)
{
static u8 data[5] __attribute__((aligned(4))) = {1, 2, 3, 4, 5};
u32 *p;
@@ -245,21 +245,21 @@ void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void)
pr_err("XFAIL: arch has CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS\n");
}
-void lkdtm_SOFTLOCKUP(void)
+static void lkdtm_SOFTLOCKUP(void)
{
preempt_disable();
for (;;)
cpu_relax();
}
-void lkdtm_HARDLOCKUP(void)
+static void lkdtm_HARDLOCKUP(void)
{
local_irq_disable();
for (;;)
cpu_relax();
}
-void lkdtm_SPINLOCKUP(void)
+static void lkdtm_SPINLOCKUP(void)
{
/* Must be called twice to trigger. */
spin_lock(&lock_me_up);
@@ -267,7 +267,7 @@ void lkdtm_SPINLOCKUP(void)
__release(&lock_me_up);
}
-void lkdtm_HUNG_TASK(void)
+static void lkdtm_HUNG_TASK(void)
{
set_current_state(TASK_UNINTERRUPTIBLE);
schedule();
@@ -276,7 +276,7 @@ void lkdtm_HUNG_TASK(void)
volatile unsigned int huge = INT_MAX - 2;
volatile unsigned int ignored;
-void lkdtm_OVERFLOW_SIGNED(void)
+static void lkdtm_OVERFLOW_SIGNED(void)
{
int value;
@@ -291,7 +291,7 @@ void lkdtm_OVERFLOW_SIGNED(void)
}
-void lkdtm_OVERFLOW_UNSIGNED(void)
+static void lkdtm_OVERFLOW_UNSIGNED(void)
{
unsigned int value;
@@ -319,7 +319,7 @@ struct array_bounds {
int three;
};
-void lkdtm_ARRAY_BOUNDS(void)
+static void lkdtm_ARRAY_BOUNDS(void)
{
struct array_bounds_flex_array *not_checked;
struct array_bounds *checked;
@@ -357,7 +357,7 @@ void lkdtm_ARRAY_BOUNDS(void)
pr_expected_config(CONFIG_UBSAN_BOUNDS);
}
-void lkdtm_CORRUPT_LIST_ADD(void)
+static void lkdtm_CORRUPT_LIST_ADD(void)
{
/*
* Initially, an empty list via LIST_HEAD:
@@ -397,7 +397,7 @@ void lkdtm_CORRUPT_LIST_ADD(void)
}
}
-void lkdtm_CORRUPT_LIST_DEL(void)
+static void lkdtm_CORRUPT_LIST_DEL(void)
{
LIST_HEAD(test_head);
struct lkdtm_list item;
@@ -425,7 +425,7 @@ void lkdtm_CORRUPT_LIST_DEL(void)
}
/* Test that VMAP_STACK is actually allocating with a leading guard page */
-void lkdtm_STACK_GUARD_PAGE_LEADING(void)
+static void lkdtm_STACK_GUARD_PAGE_LEADING(void)
{
const unsigned char *stack = task_stack_page(current);
const unsigned char *ptr = stack - 1;
@@ -439,7 +439,7 @@ void lkdtm_STACK_GUARD_PAGE_LEADING(void)
}
/* Test that VMAP_STACK is actually allocating with a trailing guard page */
-void lkdtm_STACK_GUARD_PAGE_TRAILING(void)
+static void lkdtm_STACK_GUARD_PAGE_TRAILING(void)
{
const unsigned char *stack = task_stack_page(current);
const unsigned char *ptr = stack + THREAD_SIZE;
@@ -452,7 +452,7 @@ void lkdtm_STACK_GUARD_PAGE_TRAILING(void)
pr_err("FAIL: accessed page after stack! (byte: %x)\n", byte);
}
-void lkdtm_UNSET_SMEP(void)
+static void lkdtm_UNSET_SMEP(void)
{
#if IS_ENABLED(CONFIG_X86_64) && !IS_ENABLED(CONFIG_UML)
#define MOV_CR4_DEPTH 64
@@ -518,7 +518,7 @@ void lkdtm_UNSET_SMEP(void)
#endif
}
-void lkdtm_DOUBLE_FAULT(void)
+static void lkdtm_DOUBLE_FAULT(void)
{
#if IS_ENABLED(CONFIG_X86_32) && !IS_ENABLED(CONFIG_UML)
/*
@@ -566,7 +566,7 @@ static noinline void change_pac_parameters(void)
}
#endif
-noinline void lkdtm_CORRUPT_PAC(void)
+static noinline void lkdtm_CORRUPT_PAC(void)
{
#ifdef CONFIG_ARM64
#define CORRUPT_PAC_ITERATE 10
@@ -594,3 +594,37 @@ noinline void lkdtm_CORRUPT_PAC(void)
pr_err("XFAIL: this test is arm64-only\n");
#endif
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(PANIC),
+ CRASHTYPE(BUG),
+ CRASHTYPE(WARNING),
+ CRASHTYPE(WARNING_MESSAGE),
+ CRASHTYPE(EXCEPTION),
+ CRASHTYPE(LOOP),
+ CRASHTYPE(EXHAUST_STACK),
+ CRASHTYPE(CORRUPT_STACK),
+ CRASHTYPE(CORRUPT_STACK_STRONG),
+ CRASHTYPE(REPORT_STACK),
+ CRASHTYPE(REPORT_STACK_CANARY),
+ CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE),
+ CRASHTYPE(SOFTLOCKUP),
+ CRASHTYPE(HARDLOCKUP),
+ CRASHTYPE(SPINLOCKUP),
+ CRASHTYPE(HUNG_TASK),
+ CRASHTYPE(OVERFLOW_SIGNED),
+ CRASHTYPE(OVERFLOW_UNSIGNED),
+ CRASHTYPE(ARRAY_BOUNDS),
+ CRASHTYPE(CORRUPT_LIST_ADD),
+ CRASHTYPE(CORRUPT_LIST_DEL),
+ CRASHTYPE(STACK_GUARD_PAGE_LEADING),
+ CRASHTYPE(STACK_GUARD_PAGE_TRAILING),
+ CRASHTYPE(UNSET_SMEP),
+ CRASHTYPE(DOUBLE_FAULT),
+ CRASHTYPE(CORRUPT_PAC),
+};
+
+struct crashtype_category bugs_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/cfi.c b/drivers/misc/lkdtm/cfi.c
index c9aeddef1044..e88f778be0d5 100644
--- a/drivers/misc/lkdtm/cfi.c
+++ b/drivers/misc/lkdtm/cfi.c
@@ -22,7 +22,7 @@ static noinline int lkdtm_increment_int(int *counter)
/*
* This tries to call an indirect function with a mismatched prototype.
*/
-void lkdtm_CFI_FORWARD_PROTO(void)
+static void lkdtm_CFI_FORWARD_PROTO(void)
{
/*
* Matches lkdtm_increment_void()'s prototype, but not
@@ -41,3 +41,12 @@ void lkdtm_CFI_FORWARD_PROTO(void)
pr_err("FAIL: survived mismatched prototype function call!\n");
pr_expected_config(CONFIG_CFI_CLANG);
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(CFI_FORWARD_PROTO),
+};
+
+struct crashtype_category cfi_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index e2228b6fc09b..b4712ff196b4 100644
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -86,109 +86,21 @@ static struct crashpoint crashpoints[] = {
#endif
};
-
-/* Crash types. */
-struct crashtype {
- const char *name;
- void (*func)(void);
-};
-
-#define CRASHTYPE(_name) \
- { \
- .name = __stringify(_name), \
- .func = lkdtm_ ## _name, \
- }
-
-/* Define the possible types of crashes that can be triggered. */
-static const struct crashtype crashtypes[] = {
- CRASHTYPE(PANIC),
- CRASHTYPE(BUG),
- CRASHTYPE(WARNING),
- CRASHTYPE(WARNING_MESSAGE),
- CRASHTYPE(EXCEPTION),
- CRASHTYPE(LOOP),
- CRASHTYPE(EXHAUST_STACK),
- CRASHTYPE(CORRUPT_STACK),
- CRASHTYPE(CORRUPT_STACK_STRONG),
- CRASHTYPE(REPORT_STACK),
- CRASHTYPE(REPORT_STACK_CANARY),
- CRASHTYPE(CORRUPT_LIST_ADD),
- CRASHTYPE(CORRUPT_LIST_DEL),
- CRASHTYPE(STACK_GUARD_PAGE_LEADING),
- CRASHTYPE(STACK_GUARD_PAGE_TRAILING),
- CRASHTYPE(UNSET_SMEP),
- CRASHTYPE(CORRUPT_PAC),
- CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE),
- CRASHTYPE(SLAB_LINEAR_OVERFLOW),
- CRASHTYPE(VMALLOC_LINEAR_OVERFLOW),
- CRASHTYPE(WRITE_AFTER_FREE),
- CRASHTYPE(READ_AFTER_FREE),
- CRASHTYPE(WRITE_BUDDY_AFTER_FREE),
- CRASHTYPE(READ_BUDDY_AFTER_FREE),
- CRASHTYPE(SLAB_INIT_ON_ALLOC),
- CRASHTYPE(BUDDY_INIT_ON_ALLOC),
- CRASHTYPE(SLAB_FREE_DOUBLE),
- CRASHTYPE(SLAB_FREE_CROSS),
- CRASHTYPE(SLAB_FREE_PAGE),
- CRASHTYPE(SOFTLOCKUP),
- CRASHTYPE(HARDLOCKUP),
- CRASHTYPE(SPINLOCKUP),
- CRASHTYPE(HUNG_TASK),
- CRASHTYPE(OVERFLOW_SIGNED),
- CRASHTYPE(OVERFLOW_UNSIGNED),
- CRASHTYPE(ARRAY_BOUNDS),
- CRASHTYPE(EXEC_DATA),
- CRASHTYPE(EXEC_STACK),
- CRASHTYPE(EXEC_KMALLOC),
- CRASHTYPE(EXEC_VMALLOC),
- CRASHTYPE(EXEC_RODATA),
- CRASHTYPE(EXEC_USERSPACE),
- CRASHTYPE(EXEC_NULL),
- CRASHTYPE(ACCESS_USERSPACE),
- CRASHTYPE(ACCESS_NULL),
- CRASHTYPE(WRITE_RO),
- CRASHTYPE(WRITE_RO_AFTER_INIT),
- CRASHTYPE(WRITE_KERN),
- CRASHTYPE(WRITE_OPD),
- CRASHTYPE(REFCOUNT_INC_OVERFLOW),
- CRASHTYPE(REFCOUNT_ADD_OVERFLOW),
- CRASHTYPE(REFCOUNT_INC_NOT_ZERO_OVERFLOW),
- CRASHTYPE(REFCOUNT_ADD_NOT_ZERO_OVERFLOW),
- CRASHTYPE(REFCOUNT_DEC_ZERO),
- CRASHTYPE(REFCOUNT_DEC_NEGATIVE),
- CRASHTYPE(REFCOUNT_DEC_AND_TEST_NEGATIVE),
- CRASHTYPE(REFCOUNT_SUB_AND_TEST_NEGATIVE),
- CRASHTYPE(REFCOUNT_INC_ZERO),
- CRASHTYPE(REFCOUNT_ADD_ZERO),
- CRASHTYPE(REFCOUNT_INC_SATURATED),
- CRASHTYPE(REFCOUNT_DEC_SATURATED),
- CRASHTYPE(REFCOUNT_ADD_SATURATED),
- CRASHTYPE(REFCOUNT_INC_NOT_ZERO_SATURATED),
- CRASHTYPE(REFCOUNT_ADD_NOT_ZERO_SATURATED),
- CRASHTYPE(REFCOUNT_DEC_AND_TEST_SATURATED),
- CRASHTYPE(REFCOUNT_SUB_AND_TEST_SATURATED),
- CRASHTYPE(REFCOUNT_TIMING),
- CRASHTYPE(ATOMIC_TIMING),
- CRASHTYPE(USERCOPY_HEAP_SIZE_TO),
- CRASHTYPE(USERCOPY_HEAP_SIZE_FROM),
- CRASHTYPE(USERCOPY_HEAP_WHITELIST_TO),
- CRASHTYPE(USERCOPY_HEAP_WHITELIST_FROM),
- CRASHTYPE(USERCOPY_STACK_FRAME_TO),
- CRASHTYPE(USERCOPY_STACK_FRAME_FROM),
- CRASHTYPE(USERCOPY_STACK_BEYOND),
- CRASHTYPE(USERCOPY_KERNEL),
- CRASHTYPE(STACKLEAK_ERASING),
- CRASHTYPE(CFI_FORWARD_PROTO),
- CRASHTYPE(FORTIFIED_OBJECT),
- CRASHTYPE(FORTIFIED_SUBOBJECT),
- CRASHTYPE(FORTIFIED_STRSCPY),
- CRASHTYPE(DOUBLE_FAULT),
+/* List of possible types for crashes that can be triggered. */
+static const struct crashtype_category *crashtype_categories[] = {
+ &bugs_crashtypes,
+ &heap_crashtypes,
+ &perms_crashtypes,
+ &refcount_crashtypes,
+ &usercopy_crashtypes,
+ &stackleak_crashtypes,
+ &cfi_crashtypes,
+ &fortify_crashtypes,
#ifdef CONFIG_PPC_64S_HASH_MMU
- CRASHTYPE(PPC_SLB_MULTIHIT),
+ &powerpc_crashtypes,
#endif
};
-
/* Global kprobe entry and crashtype. */
static struct kprobe *lkdtm_kprobe;
static struct crashpoint *lkdtm_crashpoint;
@@ -223,11 +135,16 @@ char *lkdtm_kernel_info;
/* Return the crashtype number or NULL if the name is invalid */
static const struct crashtype *find_crashtype(const char *name)
{
- int i;
+ int cat, idx;
+
+ for (cat = 0; cat < ARRAY_SIZE(crashtype_categories); cat++) {
+ for (idx = 0; idx < crashtype_categories[cat]->len; idx++) {
+ struct crashtype *crashtype;
- for (i = 0; i < ARRAY_SIZE(crashtypes); i++) {
- if (!strcmp(name, crashtypes[i].name))
- return &crashtypes[i];
+ crashtype = &crashtype_categories[cat]->crashtypes[idx];
+ if (!strcmp(name, crashtype->name))
+ return crashtype;
+ }
}
return NULL;
@@ -347,17 +264,24 @@ static ssize_t lkdtm_debugfs_entry(struct file *f,
static ssize_t lkdtm_debugfs_read(struct file *f, char __user *user_buf,
size_t count, loff_t *off)
{
+ int n, cat, idx;
+ ssize_t out;
char *buf;
- int i, n, out;
buf = (char *)__get_free_page(GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
n = scnprintf(buf, PAGE_SIZE, "Available crash types:\n");
- for (i = 0; i < ARRAY_SIZE(crashtypes); i++) {
- n += scnprintf(buf + n, PAGE_SIZE - n, "%s\n",
- crashtypes[i].name);
+
+ for (cat = 0; cat < ARRAY_SIZE(crashtype_categories); cat++) {
+ for (idx = 0; idx < crashtype_categories[cat]->len; idx++) {
+ struct crashtype *crashtype;
+
+ crashtype = &crashtype_categories[cat]->crashtypes[idx];
+ n += scnprintf(buf + n, PAGE_SIZE - n, "%s\n",
+ crashtype->name);
+ }
}
buf[n] = '\0';
diff --git a/drivers/misc/lkdtm/fortify.c b/drivers/misc/lkdtm/fortify.c
index ab33bb5e2e7a..080293fa3c52 100644
--- a/drivers/misc/lkdtm/fortify.c
+++ b/drivers/misc/lkdtm/fortify.c
@@ -10,7 +10,7 @@
static volatile int fortify_scratch_space;
-void lkdtm_FORTIFIED_OBJECT(void)
+static void lkdtm_FORTIFIED_OBJECT(void)
{
struct target {
char a[10];
@@ -31,7 +31,7 @@ void lkdtm_FORTIFIED_OBJECT(void)
pr_expected_config(CONFIG_FORTIFY_SOURCE);
}
-void lkdtm_FORTIFIED_SUBOBJECT(void)
+static void lkdtm_FORTIFIED_SUBOBJECT(void)
{
struct target {
char a[10];
@@ -67,7 +67,7 @@ void lkdtm_FORTIFIED_SUBOBJECT(void)
* strscpy and generate a panic because there is a write overflow (i.e. src
* length is greater than dst length).
*/
-void lkdtm_FORTIFIED_STRSCPY(void)
+static void lkdtm_FORTIFIED_STRSCPY(void)
{
char *src;
char dst[5];
@@ -134,3 +134,14 @@ void lkdtm_FORTIFIED_STRSCPY(void)
kfree(src);
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(FORTIFIED_OBJECT),
+ CRASHTYPE(FORTIFIED_SUBOBJECT),
+ CRASHTYPE(FORTIFIED_STRSCPY),
+};
+
+struct crashtype_category fortify_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/heap.c b/drivers/misc/lkdtm/heap.c
index b4ac726a548f..5d3b92cd23bd 100644
--- a/drivers/misc/lkdtm/heap.c
+++ b/drivers/misc/lkdtm/heap.c
@@ -26,7 +26,7 @@ static volatile int __offset = 1;
* This should always be caught because there is an unconditional unmapped
* page after vmap allocations.
*/
-void lkdtm_VMALLOC_LINEAR_OVERFLOW(void)
+static void lkdtm_VMALLOC_LINEAR_OVERFLOW(void)
{
char *one, *two;
@@ -48,7 +48,7 @@ void lkdtm_VMALLOC_LINEAR_OVERFLOW(void)
* This should get caught by either memory tagging, KASan, or by using
* CONFIG_SLUB_DEBUG=y and slub_debug=ZF (or CONFIG_SLUB_DEBUG_ON=y).
*/
-void lkdtm_SLAB_LINEAR_OVERFLOW(void)
+static void lkdtm_SLAB_LINEAR_OVERFLOW(void)
{
size_t len = 1020;
u32 *data = kmalloc(len, GFP_KERNEL);
@@ -60,7 +60,7 @@ void lkdtm_SLAB_LINEAR_OVERFLOW(void)
kfree(data);
}
-void lkdtm_WRITE_AFTER_FREE(void)
+static void lkdtm_WRITE_AFTER_FREE(void)
{
int *base, *again;
size_t len = 1024;
@@ -86,7 +86,7 @@ void lkdtm_WRITE_AFTER_FREE(void)
pr_info("Hmm, didn't get the same memory range.\n");
}
-void lkdtm_READ_AFTER_FREE(void)
+static void lkdtm_READ_AFTER_FREE(void)
{
int *base, *val, saw;
size_t len = 1024;
@@ -130,7 +130,7 @@ void lkdtm_READ_AFTER_FREE(void)
kfree(val);
}
-void lkdtm_WRITE_BUDDY_AFTER_FREE(void)
+static void lkdtm_WRITE_BUDDY_AFTER_FREE(void)
{
unsigned long p = __get_free_page(GFP_KERNEL);
if (!p) {
@@ -150,7 +150,7 @@ void lkdtm_WRITE_BUDDY_AFTER_FREE(void)
schedule();
}
-void lkdtm_READ_BUDDY_AFTER_FREE(void)
+static void lkdtm_READ_BUDDY_AFTER_FREE(void)
{
unsigned long p = __get_free_page(GFP_KERNEL);
int saw, *val;
@@ -187,7 +187,7 @@ void lkdtm_READ_BUDDY_AFTER_FREE(void)
kfree(val);
}
-void lkdtm_SLAB_INIT_ON_ALLOC(void)
+static void lkdtm_SLAB_INIT_ON_ALLOC(void)
{
u8 *first;
u8 *val;
@@ -219,7 +219,7 @@ void lkdtm_SLAB_INIT_ON_ALLOC(void)
kfree(val);
}
-void lkdtm_BUDDY_INIT_ON_ALLOC(void)
+static void lkdtm_BUDDY_INIT_ON_ALLOC(void)
{
u8 *first;
u8 *val;
@@ -252,7 +252,7 @@ void lkdtm_BUDDY_INIT_ON_ALLOC(void)
free_page((unsigned long)val);
}
-void lkdtm_SLAB_FREE_DOUBLE(void)
+static void lkdtm_SLAB_FREE_DOUBLE(void)
{
int *val;
@@ -269,7 +269,7 @@ void lkdtm_SLAB_FREE_DOUBLE(void)
kmem_cache_free(double_free_cache, val);
}
-void lkdtm_SLAB_FREE_CROSS(void)
+static void lkdtm_SLAB_FREE_CROSS(void)
{
int *val;
@@ -285,7 +285,7 @@ void lkdtm_SLAB_FREE_CROSS(void)
kmem_cache_free(b_cache, val);
}
-void lkdtm_SLAB_FREE_PAGE(void)
+static void lkdtm_SLAB_FREE_PAGE(void)
{
unsigned long p = __get_free_page(GFP_KERNEL);
@@ -319,3 +319,22 @@ void __exit lkdtm_heap_exit(void)
kmem_cache_destroy(a_cache);
kmem_cache_destroy(b_cache);
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(SLAB_LINEAR_OVERFLOW),
+ CRASHTYPE(VMALLOC_LINEAR_OVERFLOW),
+ CRASHTYPE(WRITE_AFTER_FREE),
+ CRASHTYPE(READ_AFTER_FREE),
+ CRASHTYPE(WRITE_BUDDY_AFTER_FREE),
+ CRASHTYPE(READ_BUDDY_AFTER_FREE),
+ CRASHTYPE(SLAB_INIT_ON_ALLOC),
+ CRASHTYPE(BUDDY_INIT_ON_ALLOC),
+ CRASHTYPE(SLAB_FREE_DOUBLE),
+ CRASHTYPE(SLAB_FREE_CROSS),
+ CRASHTYPE(SLAB_FREE_PAGE),
+};
+
+struct crashtype_category heap_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h
index 90f87b193c1e..015e0484026b 100644
--- a/drivers/misc/lkdtm/lkdtm.h
+++ b/drivers/misc/lkdtm/lkdtm.h
@@ -57,114 +57,44 @@ do { \
#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)
#endif
-/* bugs.c */
+/* Crash types. */
+struct crashtype {
+ const char *name;
+ void (*func)(void);
+};
+
+#define CRASHTYPE(_name) \
+ { \
+ .name = __stringify(_name), \
+ .func = lkdtm_ ## _name, \
+ }
+
+/* Category's collection of crashtypes. */
+struct crashtype_category {
+ struct crashtype *crashtypes;
+ size_t len;
+};
+
+/* Each category's crashtypes list. */
+extern struct crashtype_category bugs_crashtypes;
+extern struct crashtype_category heap_crashtypes;
+extern struct crashtype_category perms_crashtypes;
+extern struct crashtype_category refcount_crashtypes;
+extern struct crashtype_category usercopy_crashtypes;
+extern struct crashtype_category stackleak_crashtypes;
+extern struct crashtype_category cfi_crashtypes;
+extern struct crashtype_category fortify_crashtypes;
+extern struct crashtype_category powerpc_crashtypes;
+
+/* Each category's init/exit routines. */
void __init lkdtm_bugs_init(int *recur_param);
-void lkdtm_PANIC(void);
-void lkdtm_BUG(void);
-void lkdtm_WARNING(void);
-void lkdtm_WARNING_MESSAGE(void);
-void lkdtm_EXCEPTION(void);
-void lkdtm_LOOP(void);
-void lkdtm_EXHAUST_STACK(void);
-void lkdtm_CORRUPT_STACK(void);
-void lkdtm_CORRUPT_STACK_STRONG(void);
-void lkdtm_REPORT_STACK(void);
-void lkdtm_REPORT_STACK_CANARY(void);
-void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void);
-void lkdtm_SOFTLOCKUP(void);
-void lkdtm_HARDLOCKUP(void);
-void lkdtm_SPINLOCKUP(void);
-void lkdtm_HUNG_TASK(void);
-void lkdtm_OVERFLOW_SIGNED(void);
-void lkdtm_OVERFLOW_UNSIGNED(void);
-void lkdtm_ARRAY_BOUNDS(void);
-void lkdtm_CORRUPT_LIST_ADD(void);
-void lkdtm_CORRUPT_LIST_DEL(void);
-void lkdtm_STACK_GUARD_PAGE_LEADING(void);
-void lkdtm_STACK_GUARD_PAGE_TRAILING(void);
-void lkdtm_UNSET_SMEP(void);
-void lkdtm_DOUBLE_FAULT(void);
-void lkdtm_CORRUPT_PAC(void);
-
-/* heap.c */
void __init lkdtm_heap_init(void);
void __exit lkdtm_heap_exit(void);
-void lkdtm_VMALLOC_LINEAR_OVERFLOW(void);
-void lkdtm_SLAB_LINEAR_OVERFLOW(void);
-void lkdtm_WRITE_AFTER_FREE(void);
-void lkdtm_READ_AFTER_FREE(void);
-void lkdtm_WRITE_BUDDY_AFTER_FREE(void);
-void lkdtm_READ_BUDDY_AFTER_FREE(void);
-void lkdtm_SLAB_INIT_ON_ALLOC(void);
-void lkdtm_BUDDY_INIT_ON_ALLOC(void);
-void lkdtm_SLAB_FREE_DOUBLE(void);
-void lkdtm_SLAB_FREE_CROSS(void);
-void lkdtm_SLAB_FREE_PAGE(void);
-
-/* perms.c */
void __init lkdtm_perms_init(void);
-void lkdtm_WRITE_RO(void);
-void lkdtm_WRITE_RO_AFTER_INIT(void);
-void lkdtm_WRITE_KERN(void);
-void lkdtm_WRITE_OPD(void);
-void lkdtm_EXEC_DATA(void);
-void lkdtm_EXEC_STACK(void);
-void lkdtm_EXEC_KMALLOC(void);
-void lkdtm_EXEC_VMALLOC(void);
-void lkdtm_EXEC_RODATA(void);
-void lkdtm_EXEC_USERSPACE(void);
-void lkdtm_EXEC_NULL(void);
-void lkdtm_ACCESS_USERSPACE(void);
-void lkdtm_ACCESS_NULL(void);
-
-/* refcount.c */
-void lkdtm_REFCOUNT_INC_OVERFLOW(void);
-void lkdtm_REFCOUNT_ADD_OVERFLOW(void);
-void lkdtm_REFCOUNT_INC_NOT_ZERO_OVERFLOW(void);
-void lkdtm_REFCOUNT_ADD_NOT_ZERO_OVERFLOW(void);
-void lkdtm_REFCOUNT_DEC_ZERO(void);
-void lkdtm_REFCOUNT_DEC_NEGATIVE(void);
-void lkdtm_REFCOUNT_DEC_AND_TEST_NEGATIVE(void);
-void lkdtm_REFCOUNT_SUB_AND_TEST_NEGATIVE(void);
-void lkdtm_REFCOUNT_INC_ZERO(void);
-void lkdtm_REFCOUNT_ADD_ZERO(void);
-void lkdtm_REFCOUNT_INC_SATURATED(void);
-void lkdtm_REFCOUNT_DEC_SATURATED(void);
-void lkdtm_REFCOUNT_ADD_SATURATED(void);
-void lkdtm_REFCOUNT_INC_NOT_ZERO_SATURATED(void);
-void lkdtm_REFCOUNT_ADD_NOT_ZERO_SATURATED(void);
-void lkdtm_REFCOUNT_DEC_AND_TEST_SATURATED(void);
-void lkdtm_REFCOUNT_SUB_AND_TEST_SATURATED(void);
-void lkdtm_REFCOUNT_TIMING(void);
-void lkdtm_ATOMIC_TIMING(void);
-
-/* rodata.c */
-void lkdtm_rodata_do_nothing(void);
-
-/* usercopy.c */
void __init lkdtm_usercopy_init(void);
void __exit lkdtm_usercopy_exit(void);
-void lkdtm_USERCOPY_HEAP_SIZE_TO(void);
-void lkdtm_USERCOPY_HEAP_SIZE_FROM(void);
-void lkdtm_USERCOPY_HEAP_WHITELIST_TO(void);
-void lkdtm_USERCOPY_HEAP_WHITELIST_FROM(void);
-void lkdtm_USERCOPY_STACK_FRAME_TO(void);
-void lkdtm_USERCOPY_STACK_FRAME_FROM(void);
-void lkdtm_USERCOPY_STACK_BEYOND(void);
-void lkdtm_USERCOPY_KERNEL(void);
-
-/* stackleak.c */
-void lkdtm_STACKLEAK_ERASING(void);
-
-/* cfi.c */
-void lkdtm_CFI_FORWARD_PROTO(void);
-/* fortify.c */
-void lkdtm_FORTIFIED_OBJECT(void);
-void lkdtm_FORTIFIED_SUBOBJECT(void);
-void lkdtm_FORTIFIED_STRSCPY(void);
-
-/* powerpc.c */
-void lkdtm_PPC_SLB_MULTIHIT(void);
+/* Special declaration for function-in-rodata. */
+void lkdtm_rodata_do_nothing(void);
#endif
diff --git a/drivers/misc/lkdtm/perms.c b/drivers/misc/lkdtm/perms.c
index 2c6aba3ff32b..b93404d65650 100644
--- a/drivers/misc/lkdtm/perms.c
+++ b/drivers/misc/lkdtm/perms.c
@@ -103,7 +103,7 @@ static void execute_user_location(void *dst)
pr_err("FAIL: func returned\n");
}
-void lkdtm_WRITE_RO(void)
+static void lkdtm_WRITE_RO(void)
{
/* Explicitly cast away "const" for the test and make volatile. */
volatile unsigned long *ptr = (unsigned long *)&rodata;
@@ -113,7 +113,7 @@ void lkdtm_WRITE_RO(void)
pr_err("FAIL: survived bad write\n");
}
-void lkdtm_WRITE_RO_AFTER_INIT(void)
+static void lkdtm_WRITE_RO_AFTER_INIT(void)
{
volatile unsigned long *ptr = &ro_after_init;
@@ -132,7 +132,7 @@ void lkdtm_WRITE_RO_AFTER_INIT(void)
pr_err("FAIL: survived bad write\n");
}
-void lkdtm_WRITE_KERN(void)
+static void lkdtm_WRITE_KERN(void)
{
size_t size;
volatile unsigned char *ptr;
@@ -149,7 +149,7 @@ void lkdtm_WRITE_KERN(void)
do_overwritten();
}
-void lkdtm_WRITE_OPD(void)
+static void lkdtm_WRITE_OPD(void)
{
size_t size = sizeof(func_desc_t);
void (*func)(void) = do_nothing;
@@ -166,38 +166,38 @@ void lkdtm_WRITE_OPD(void)
func();
}
-void lkdtm_EXEC_DATA(void)
+static void lkdtm_EXEC_DATA(void)
{
execute_location(data_area, CODE_WRITE);
}
-void lkdtm_EXEC_STACK(void)
+static void lkdtm_EXEC_STACK(void)
{
u8 stack_area[EXEC_SIZE];
execute_location(stack_area, CODE_WRITE);
}
-void lkdtm_EXEC_KMALLOC(void)
+static void lkdtm_EXEC_KMALLOC(void)
{
u32 *kmalloc_area = kmalloc(EXEC_SIZE, GFP_KERNEL);
execute_location(kmalloc_area, CODE_WRITE);
kfree(kmalloc_area);
}
-void lkdtm_EXEC_VMALLOC(void)
+static void lkdtm_EXEC_VMALLOC(void)
{
u32 *vmalloc_area = vmalloc(EXEC_SIZE);
execute_location(vmalloc_area, CODE_WRITE);
vfree(vmalloc_area);
}
-void lkdtm_EXEC_RODATA(void)
+static void lkdtm_EXEC_RODATA(void)
{
execute_location(dereference_function_descriptor(lkdtm_rodata_do_nothing),
CODE_AS_IS);
}
-void lkdtm_EXEC_USERSPACE(void)
+static void lkdtm_EXEC_USERSPACE(void)
{
unsigned long user_addr;
@@ -212,12 +212,12 @@ void lkdtm_EXEC_USERSPACE(void)
vm_munmap(user_addr, PAGE_SIZE);
}
-void lkdtm_EXEC_NULL(void)
+static void lkdtm_EXEC_NULL(void)
{
execute_location(NULL, CODE_AS_IS);
}
-void lkdtm_ACCESS_USERSPACE(void)
+static void lkdtm_ACCESS_USERSPACE(void)
{
unsigned long user_addr, tmp = 0;
unsigned long *ptr;
@@ -250,7 +250,7 @@ void lkdtm_ACCESS_USERSPACE(void)
vm_munmap(user_addr, PAGE_SIZE);
}
-void lkdtm_ACCESS_NULL(void)
+static void lkdtm_ACCESS_NULL(void)
{
unsigned long tmp;
volatile unsigned long *ptr = (unsigned long *)NULL;
@@ -270,3 +270,24 @@ void __init lkdtm_perms_init(void)
/* Make sure we can write to __ro_after_init values during __init */
ro_after_init |= 0xAA;
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(WRITE_RO),
+ CRASHTYPE(WRITE_RO_AFTER_INIT),
+ CRASHTYPE(WRITE_KERN),
+ CRASHTYPE(WRITE_OPD),
+ CRASHTYPE(EXEC_DATA),
+ CRASHTYPE(EXEC_STACK),
+ CRASHTYPE(EXEC_KMALLOC),
+ CRASHTYPE(EXEC_VMALLOC),
+ CRASHTYPE(EXEC_RODATA),
+ CRASHTYPE(EXEC_USERSPACE),
+ CRASHTYPE(EXEC_NULL),
+ CRASHTYPE(ACCESS_USERSPACE),
+ CRASHTYPE(ACCESS_NULL),
+};
+
+struct crashtype_category perms_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/powerpc.c b/drivers/misc/lkdtm/powerpc.c
index 077c9f9ed8d0..be385449911a 100644
--- a/drivers/misc/lkdtm/powerpc.c
+++ b/drivers/misc/lkdtm/powerpc.c
@@ -100,7 +100,7 @@ static void insert_dup_slb_entry_0(void)
preempt_enable();
}
-void lkdtm_PPC_SLB_MULTIHIT(void)
+static void lkdtm_PPC_SLB_MULTIHIT(void)
{
if (!radix_enabled()) {
pr_info("Injecting SLB multihit errors\n");
@@ -118,3 +118,12 @@ void lkdtm_PPC_SLB_MULTIHIT(void)
pr_err("XFAIL: This test is for ppc64 and with hash mode MMU only\n");
}
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(PPC_SLB_MULTIHIT),
+};
+
+struct crashtype_category powerpc_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/refcount.c b/drivers/misc/lkdtm/refcount.c
index de7c5ab528d9..5cd488f54cfa 100644
--- a/drivers/misc/lkdtm/refcount.c
+++ b/drivers/misc/lkdtm/refcount.c
@@ -24,7 +24,7 @@ static void overflow_check(refcount_t *ref)
* A refcount_inc() above the maximum value of the refcount implementation,
* should at least saturate, and at most also WARN.
*/
-void lkdtm_REFCOUNT_INC_OVERFLOW(void)
+static void lkdtm_REFCOUNT_INC_OVERFLOW(void)
{
refcount_t over = REFCOUNT_INIT(REFCOUNT_MAX - 1);
@@ -40,7 +40,7 @@ void lkdtm_REFCOUNT_INC_OVERFLOW(void)
}
/* refcount_add() should behave just like refcount_inc() above. */
-void lkdtm_REFCOUNT_ADD_OVERFLOW(void)
+static void lkdtm_REFCOUNT_ADD_OVERFLOW(void)
{
refcount_t over = REFCOUNT_INIT(REFCOUNT_MAX - 1);
@@ -58,7 +58,7 @@ void lkdtm_REFCOUNT_ADD_OVERFLOW(void)
}
/* refcount_inc_not_zero() should behave just like refcount_inc() above. */
-void lkdtm_REFCOUNT_INC_NOT_ZERO_OVERFLOW(void)
+static void lkdtm_REFCOUNT_INC_NOT_ZERO_OVERFLOW(void)
{
refcount_t over = REFCOUNT_INIT(REFCOUNT_MAX);
@@ -70,7 +70,7 @@ void lkdtm_REFCOUNT_INC_NOT_ZERO_OVERFLOW(void)
}
/* refcount_add_not_zero() should behave just like refcount_inc() above. */
-void lkdtm_REFCOUNT_ADD_NOT_ZERO_OVERFLOW(void)
+static void lkdtm_REFCOUNT_ADD_NOT_ZERO_OVERFLOW(void)
{
refcount_t over = REFCOUNT_INIT(REFCOUNT_MAX);
@@ -103,7 +103,7 @@ static void check_zero(refcount_t *ref)
* zero it should either saturate (when inc-from-zero isn't protected)
* or stay at zero (when inc-from-zero is protected) and should WARN for both.
*/
-void lkdtm_REFCOUNT_DEC_ZERO(void)
+static void lkdtm_REFCOUNT_DEC_ZERO(void)
{
refcount_t zero = REFCOUNT_INIT(2);
@@ -142,7 +142,7 @@ static void check_negative(refcount_t *ref, int start)
}
/* A refcount_dec() going negative should saturate and may WARN. */
-void lkdtm_REFCOUNT_DEC_NEGATIVE(void)
+static void lkdtm_REFCOUNT_DEC_NEGATIVE(void)
{
refcount_t neg = REFCOUNT_INIT(0);
@@ -156,7 +156,7 @@ void lkdtm_REFCOUNT_DEC_NEGATIVE(void)
* A refcount_dec_and_test() should act like refcount_dec() above when
* going negative.
*/
-void lkdtm_REFCOUNT_DEC_AND_TEST_NEGATIVE(void)
+static void lkdtm_REFCOUNT_DEC_AND_TEST_NEGATIVE(void)
{
refcount_t neg = REFCOUNT_INIT(0);
@@ -171,7 +171,7 @@ void lkdtm_REFCOUNT_DEC_AND_TEST_NEGATIVE(void)
* A refcount_sub_and_test() should act like refcount_dec_and_test()
* above when going negative.
*/
-void lkdtm_REFCOUNT_SUB_AND_TEST_NEGATIVE(void)
+static void lkdtm_REFCOUNT_SUB_AND_TEST_NEGATIVE(void)
{
refcount_t neg = REFCOUNT_INIT(3);
@@ -203,7 +203,7 @@ static void check_from_zero(refcount_t *ref)
/*
* A refcount_inc() from zero should pin to zero or saturate and may WARN.
*/
-void lkdtm_REFCOUNT_INC_ZERO(void)
+static void lkdtm_REFCOUNT_INC_ZERO(void)
{
refcount_t zero = REFCOUNT_INIT(0);
@@ -228,7 +228,7 @@ void lkdtm_REFCOUNT_INC_ZERO(void)
* A refcount_add() should act like refcount_inc() above when starting
* at zero.
*/
-void lkdtm_REFCOUNT_ADD_ZERO(void)
+static void lkdtm_REFCOUNT_ADD_ZERO(void)
{
refcount_t zero = REFCOUNT_INIT(0);
@@ -267,7 +267,7 @@ static void check_saturated(refcount_t *ref)
* A refcount_inc() from a saturated value should at most warn about
* being saturated already.
*/
-void lkdtm_REFCOUNT_INC_SATURATED(void)
+static void lkdtm_REFCOUNT_INC_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -278,7 +278,7 @@ void lkdtm_REFCOUNT_INC_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_DEC_SATURATED(void)
+static void lkdtm_REFCOUNT_DEC_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -289,7 +289,7 @@ void lkdtm_REFCOUNT_DEC_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_ADD_SATURATED(void)
+static void lkdtm_REFCOUNT_ADD_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -300,7 +300,7 @@ void lkdtm_REFCOUNT_ADD_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_INC_NOT_ZERO_SATURATED(void)
+static void lkdtm_REFCOUNT_INC_NOT_ZERO_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -312,7 +312,7 @@ void lkdtm_REFCOUNT_INC_NOT_ZERO_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_ADD_NOT_ZERO_SATURATED(void)
+static void lkdtm_REFCOUNT_ADD_NOT_ZERO_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -324,7 +324,7 @@ void lkdtm_REFCOUNT_ADD_NOT_ZERO_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_DEC_AND_TEST_SATURATED(void)
+static void lkdtm_REFCOUNT_DEC_AND_TEST_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -336,7 +336,7 @@ void lkdtm_REFCOUNT_DEC_AND_TEST_SATURATED(void)
}
/* Should act like refcount_inc() above from saturated. */
-void lkdtm_REFCOUNT_SUB_AND_TEST_SATURATED(void)
+static void lkdtm_REFCOUNT_SUB_AND_TEST_SATURATED(void)
{
refcount_t sat = REFCOUNT_INIT(REFCOUNT_SATURATED);
@@ -348,7 +348,7 @@ void lkdtm_REFCOUNT_SUB_AND_TEST_SATURATED(void)
}
/* Used to time the existing atomic_t when used for reference counting */
-void lkdtm_ATOMIC_TIMING(void)
+static void lkdtm_ATOMIC_TIMING(void)
{
unsigned int i;
atomic_t count = ATOMIC_INIT(1);
@@ -373,7 +373,7 @@ void lkdtm_ATOMIC_TIMING(void)
* cd /sys/kernel/debug/provoke-crash
* perf stat -B -- cat <(echo REFCOUNT_TIMING) > DIRECT
*/
-void lkdtm_REFCOUNT_TIMING(void)
+static void lkdtm_REFCOUNT_TIMING(void)
{
unsigned int i;
refcount_t count = REFCOUNT_INIT(1);
@@ -390,3 +390,30 @@ void lkdtm_REFCOUNT_TIMING(void)
else
pr_info("refcount timing: done\n");
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(REFCOUNT_INC_OVERFLOW),
+ CRASHTYPE(REFCOUNT_ADD_OVERFLOW),
+ CRASHTYPE(REFCOUNT_INC_NOT_ZERO_OVERFLOW),
+ CRASHTYPE(REFCOUNT_ADD_NOT_ZERO_OVERFLOW),
+ CRASHTYPE(REFCOUNT_DEC_ZERO),
+ CRASHTYPE(REFCOUNT_DEC_NEGATIVE),
+ CRASHTYPE(REFCOUNT_DEC_AND_TEST_NEGATIVE),
+ CRASHTYPE(REFCOUNT_SUB_AND_TEST_NEGATIVE),
+ CRASHTYPE(REFCOUNT_INC_ZERO),
+ CRASHTYPE(REFCOUNT_ADD_ZERO),
+ CRASHTYPE(REFCOUNT_INC_SATURATED),
+ CRASHTYPE(REFCOUNT_DEC_SATURATED),
+ CRASHTYPE(REFCOUNT_ADD_SATURATED),
+ CRASHTYPE(REFCOUNT_INC_NOT_ZERO_SATURATED),
+ CRASHTYPE(REFCOUNT_ADD_NOT_ZERO_SATURATED),
+ CRASHTYPE(REFCOUNT_DEC_AND_TEST_SATURATED),
+ CRASHTYPE(REFCOUNT_SUB_AND_TEST_SATURATED),
+ CRASHTYPE(ATOMIC_TIMING),
+ CRASHTYPE(REFCOUNT_TIMING),
+};
+
+struct crashtype_category refcount_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/stackleak.c b/drivers/misc/lkdtm/stackleak.c
index 00db21ff115e..210c84dfe1d2 100644
--- a/drivers/misc/lkdtm/stackleak.c
+++ b/drivers/misc/lkdtm/stackleak.c
@@ -11,7 +11,7 @@
#include "lkdtm.h"
#include <linux/stackleak.h>
-void lkdtm_STACKLEAK_ERASING(void)
+static void lkdtm_STACKLEAK_ERASING(void)
{
unsigned long *sp, left, found, i;
const unsigned long check_depth =
@@ -80,3 +80,12 @@ void lkdtm_STACKLEAK_ERASING(void)
pr_info("OK: the rest of the thread stack is properly erased\n");
}
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(STACKLEAK_ERASING),
+};
+
+struct crashtype_category stackleak_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
diff --git a/drivers/misc/lkdtm/usercopy.c b/drivers/misc/lkdtm/usercopy.c
index 3fead5efe523..7852b9fc7c47 100644
--- a/drivers/misc/lkdtm/usercopy.c
+++ b/drivers/misc/lkdtm/usercopy.c
@@ -272,42 +272,42 @@ static void do_usercopy_heap_whitelist(bool to_user)
}
/* Callable tests. */
-void lkdtm_USERCOPY_HEAP_SIZE_TO(void)
+static void lkdtm_USERCOPY_HEAP_SIZE_TO(void)
{
do_usercopy_heap_size(true);
}
-void lkdtm_USERCOPY_HEAP_SIZE_FROM(void)
+static void lkdtm_USERCOPY_HEAP_SIZE_FROM(void)
{
do_usercopy_heap_size(false);
}
-void lkdtm_USERCOPY_HEAP_WHITELIST_TO(void)
+static void lkdtm_USERCOPY_HEAP_WHITELIST_TO(void)
{
do_usercopy_heap_whitelist(true);
}
-void lkdtm_USERCOPY_HEAP_WHITELIST_FROM(void)
+static void lkdtm_USERCOPY_HEAP_WHITELIST_FROM(void)
{
do_usercopy_heap_whitelist(false);
}
-void lkdtm_USERCOPY_STACK_FRAME_TO(void)
+static void lkdtm_USERCOPY_STACK_FRAME_TO(void)
{
do_usercopy_stack(true, true);
}
-void lkdtm_USERCOPY_STACK_FRAME_FROM(void)
+static void lkdtm_USERCOPY_STACK_FRAME_FROM(void)
{
do_usercopy_stack(false, true);
}
-void lkdtm_USERCOPY_STACK_BEYOND(void)
+static void lkdtm_USERCOPY_STACK_BEYOND(void)
{
do_usercopy_stack(true, false);
}
-void lkdtm_USERCOPY_KERNEL(void)
+static void lkdtm_USERCOPY_KERNEL(void)
{
unsigned long user_addr;
@@ -356,3 +356,19 @@ void __exit lkdtm_usercopy_exit(void)
{
kmem_cache_destroy(whitelist_cache);
}
+
+static struct crashtype crashtypes[] = {
+ CRASHTYPE(USERCOPY_HEAP_SIZE_TO),
+ CRASHTYPE(USERCOPY_HEAP_SIZE_FROM),
+ CRASHTYPE(USERCOPY_HEAP_WHITELIST_TO),
+ CRASHTYPE(USERCOPY_HEAP_WHITELIST_FROM),
+ CRASHTYPE(USERCOPY_STACK_FRAME_TO),
+ CRASHTYPE(USERCOPY_STACK_FRAME_FROM),
+ CRASHTYPE(USERCOPY_STACK_BEYOND),
+ CRASHTYPE(USERCOPY_KERNEL),
+};
+
+struct crashtype_category usercopy_crashtypes = {
+ .crashtypes = crashtypes,
+ .len = ARRAY_SIZE(crashtypes),
+};
--
2.32.0
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