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proc_maps.h
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proc_maps.h
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#ifndef PROC_MAPS_H_
#define PROC_MAPS_H_
//声明
//////////////////////////////////////////////////////////////////////////
#include <linux/pid.h>
#include <linux/types.h>
#include <linux/mm_types.h>
#if MY_LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,83)
#include <linux/sched/task.h>
#include <linux/sched/mm.h>
#endif
MY_STATIC inline int down_read_mmap_lock(struct mm_struct *mm);
MY_STATIC inline int up_read_mmap_lock(struct mm_struct *mm);
MY_STATIC inline size_t get_proc_map_count(struct pid* proc_pid_struct);
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass);
//实现
//////////////////////////////////////////////////////////////////////////
#include <linux/err.h>
#include <linux/slab.h> //kmalloc与kfree
#include <linux/sched.h>
#include <linux/limits.h>
#include <linux/dcache.h>
#include <asm/uaccess.h>
#include <linux/path.h>
#include <asm-generic/mman-common.h>
#include "api_proxy.h"
#include "proc_maps_auto_offset.h"
#include "ver_control.h"
#define MY_PATH_MAX_LEN 512
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
MY_STATIC inline size_t get_proc_map_count(struct pid* proc_pid_struct) {
ssize_t accurate_offset;
struct mm_struct *mm;
size_t count = 0;
struct task_struct *task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return 0;
}
mm = get_task_mm(task);
if (!mm) {
return 0;
}
if (g_init_map_count_offset_success == false) {
return 0;
}
if (down_read_mmap_lock(mm) != 0) {
goto _exit;
}
//精确偏移
accurate_offset = (ssize_t)((size_t)&mm->map_count - (size_t)mm + g_map_count_offset_proc_maps);
printk_debug(KERN_INFO "mm->map_count accurate_offset:%zd\n", accurate_offset);
if (accurate_offset >= sizeof(struct mm_struct) - sizeof(ssize_t)) {
return 0;
}
count = *(int *)((size_t)mm + (size_t)accurate_offset);
//count = mm->map_count;
up_read_mmap_lock(mm);
_exit:mmput(mm);
return count;
}
MY_STATIC inline int check_proc_map_can_read(struct pid* proc_pid_struct, size_t proc_virt_addr, size_t size) {
struct task_struct *task = pid_task(proc_pid_struct, PIDTYPE_PID);
struct mm_struct *mm;
struct vm_area_struct *vma;
int res = 0;
if (!task) { return res; }
mm = get_task_mm(task);
if (!mm) { return res; }
//printk_debug(KERN_EMERG "mm:%p\n", &mm);
//printk_debug(KERN_EMERG "mm->map_count:%p:%lu\n", &mm->map_count, mm->map_count);
//printk_debug(KERN_EMERG "mm->mmap_lock:%p\n", &mm->mmap_lock);
//printk_debug(KERN_EMERG "mm->hiwater_vm:%p:%lu\n", &mm->hiwater_vm, mm->hiwater_vm);
//printk_debug(KERN_EMERG "mm->total_vm:%p:%lu\n", &mm->total_vm, mm->total_vm);
//printk_debug(KERN_EMERG "mm->locked_vm:%p:%lu\n", &mm->locked_vm, mm->locked_vm);
//printk_debug(KERN_EMERG "mm->pinned_vm:%p:%lu\n", &mm->pinned_vm, mm->pinned_vm);
//printk_debug(KERN_EMERG "mm->task_size:%p:%lu,%lu\n", &mm->task_size, mm->task_size, TASK_SIZE);
//printk_debug(KERN_EMERG "mm->highest_vm_end:%p:%lu\n", &mm->highest_vm_end, mm->highest_vm_end);
//printk_debug(KERN_EMERG "mm->pgd:%p:%p\n", &mm->pgd, mm->pgd);
if (down_read_mmap_lock(mm) != 0) {
goto _exit;
}
vma = find_vma(mm, proc_virt_addr);
if (vma) {
if (vma->vm_flags & VM_READ) {
size_t read_end = proc_virt_addr + size;
if (read_end <= vma->vm_end) {
res = 1;
}
}
}
up_read_mmap_lock(mm);
_exit:mmput(mm);
return res;
}
MY_STATIC inline int check_proc_map_can_write(struct pid* proc_pid_struct, size_t proc_virt_addr, size_t size) {
struct task_struct *task = pid_task(proc_pid_struct, PIDTYPE_PID);
struct mm_struct *mm;
struct vm_area_struct *vma;
int res = 0;
if (!task) { return res; }
mm = get_task_mm(task);
if (!mm) { return res; }
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return res;
}
vma = find_vma(mm, proc_virt_addr);
if (vma) {
if (vma->vm_flags & VM_WRITE) {
size_t read_end = proc_virt_addr + size;
if (read_end <= vma->vm_end) {
res = 1;
}
}
}
up_read_mmap_lock(mm);
mmput(mm);
return res;
}
#if MY_LINUX_VERSION_CODE == KERNEL_VERSION(3,10,0)
/* Check if the vma is being used as a stack by this task */
MY_STATIC int vm_is_stack_for_task(struct task_struct *t,
struct vm_area_struct *vma) {
return (vma->vm_start <= KSTK_ESP(t) && vma->vm_end >= KSTK_ESP(t));
}
/*
* Check if the vma is being used as a stack.
* If is_group is non-zero, check in the entire thread group or else
* just check in the current task. Returns the pid of the task that
* the vma is stack for.
*/
MY_STATIC pid_t vm_is_stack(struct task_struct *task,
struct vm_area_struct *vma, int in_group) {
pid_t ret = 0;
if (vm_is_stack_for_task(task, vma))
return task->pid;
if (in_group) {
struct task_struct *t;
rcu_read_lock();
if (!pid_alive(task))
goto done;
t = task;
do {
if (vm_is_stack_for_task(t, vma)) {
ret = t->pid;
goto done;
}
} while_each_thread(task, t);
done:
rcu_read_unlock();
}
return ret;
}
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass) {
struct task_struct *task;
struct mm_struct *mm;
struct vm_area_struct *vma;
char new_path[MY_PATH_MAX_LEN];
char path_buf[MY_PATH_MAX_LEN];
int success = 0;
if (max_path_length <= 0) {
return -1;
}
task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return -2;
}
mm = get_task_mm(task);
if (!mm) {
return -3;
}
if (is_kernel_buf) {
memset(lpBuf, 0, buf_size);
}
//else if (clear_user(lpBuf, buf_size)) { return -4; } //清空用户的缓冲区
copy_pos = (size_t)lpBuf;
end_pos = (size_t)((size_t)lpBuf + buf_size);
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return -4;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long start, end;
unsigned char flags[4];
struct file * vm_file;
if (copy_pos >= end_pos) {
if (have_pass) {
*have_pass = 1;
}
break;
}
start = vma->vm_start;
end = vma->vm_end;
/* We don't show the stack guard page in /proc/maps */
start = vma->vm_start;
if (stack_guard_page_start(vma, start))
start += PAGE_SIZE;
end = vma->vm_end;
if (stack_guard_page_end(vma, end))
end -= PAGE_SIZE;
flags[0] = vma->vm_flags & VM_READ ? '\x01' : '\x00';
flags[1] = vma->vm_flags & VM_WRITE ? '\x01' : '\x00';
flags[2] = vma->vm_flags & VM_EXEC ? '\x01' : '\x00';
flags[3] = vma->vm_flags & VM_MAYSHARE ? '\x01' : '\x00';
memset(new_path, 0, sizeof(new_path));
vm_file = get_vm_file(vma);
if (vm_file) {
char *path;
memset(path_buf, 0, sizeof(path_buf));
path = d_path(&vm_file->f_path, path_buf, sizeof(path_buf));
if (path > 0) {
strncat(new_path, path, sizeof(new_path) - 1);
}
} else if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[vdso]");
}
} else {
if (vma->vm_start <= mm->brk &&
vma->vm_end >= mm->start_brk) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[heap]");
}
} else {
pid_t tid = vm_is_stack(task, vma, 1);
if (tid != 0) {
/*
* Thread stack in /proc/PID/task/TID/maps or
* the main process stack.
*/
/* Thread stack in /proc/PID/maps */
sprintf(new_path, "[stack:%d]", tid);
}
}
}
if (is_kernel_buf) {
memcpy((void*)copy_pos, &start, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &end, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &flags, 4);
copy_pos += 4;
memcpy((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1);
copy_pos += max_path_length;
} else {
//内核空间->用户空间交换数据
if (!!x_copy_to_user((void*)copy_pos, &start, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &end, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &flags, 4)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 4;
if (!!x_copy_to_user((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += max_path_length;
}
success++;
}
up_read_mmap_lock(mm);
mmput(mm);
return success;
}
#endif
#if MY_LINUX_VERSION_CODE == KERNEL_VERSION(3,10,84)
/* Check if the vma is being used as a stack by this task */
MY_STATIC int vm_is_stack_for_task(struct task_struct *t,
struct vm_area_struct *vma) {
return (vma->vm_start <= KSTK_ESP(t) && vma->vm_end >= KSTK_ESP(t));
}
/*
* Check if the vma is being used as a stack.
* If is_group is non-zero, check in the entire thread group or else
* just check in the current task. Returns the pid of the task that
* the vma is stack for.
*/
MY_STATIC pid_t my_vm_is_stack(struct task_struct *task,
struct vm_area_struct *vma, int in_group) {
pid_t ret = 0;
if (vm_is_stack_for_task(task, vma))
return task->pid;
if (in_group) {
struct task_struct *t;
rcu_read_lock();
if (!pid_alive(task))
goto done;
t = task;
do {
if (vm_is_stack_for_task(t, vma)) {
ret = t->pid;
goto done;
}
} while_each_thread(task, t);
done:
rcu_read_unlock();
}
return ret;
}
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass) {
struct task_struct *task;
struct mm_struct *mm;
struct vm_area_struct *vma;
char new_path[MY_PATH_MAX_LEN];
char path_buf[MY_PATH_MAX_LEN];
int success = 0;
size_t copy_pos;
size_t end_pos;
if (max_path_length <= 0) {
return -1;
}
task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return -2;
}
mm = get_task_mm(task);
if (!mm) {
return -3;
}
if (is_kernel_buf) {
memset(lpBuf, 0, buf_size);
}
//else if (clear_user(lpBuf, buf_size)) { return -4; } //清空用户的缓冲区
copy_pos = (size_t)lpBuf;
end_pos = (size_t)((size_t)lpBuf + buf_size);
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return -4;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long start, end;
unsigned char flags[4];
struct file * vm_file;
if (copy_pos >= end_pos) {
if (have_pass) {
*have_pass = 1;
}
break;
}
start = vma->vm_start;
end = vma->vm_end;
/* We don't show the stack guard page in /proc/maps */
start = vma->vm_start;
if (stack_guard_page_start(vma, start))
start += PAGE_SIZE;
end = vma->vm_end;
if (stack_guard_page_end(vma, end))
end -= PAGE_SIZE;
flags[0] = vma->vm_flags & VM_READ ? '\x01' : '\x00';
flags[1] = vma->vm_flags & VM_WRITE ? '\x01' : '\x00';
flags[2] = vma->vm_flags & VM_EXEC ? '\x01' : '\x00';
flags[3] = vma->vm_flags & VM_MAYSHARE ? '\x01' : '\x00';
memset(new_path, 0, sizeof(new_path));
vm_file = get_vm_file(vma);
if (vm_file) {
char *path;
memset(path_buf, 0, sizeof(path_buf));
path = d_path(&vm_file->f_path, path_buf, sizeof(path_buf));
if (path > 0) {
strncat(new_path, path, sizeof(new_path) - 1);
}
} else if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[vdso]");
}
} else {
if (vma->vm_start <= mm->brk &&
vma->vm_end >= mm->start_brk) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[heap]");
}
} else {
pid_t tid = my_vm_is_stack(task, vma, 1);
if (tid != 0) {
/*
* Thread stack in /proc/PID/task/TID/maps or
* the main process stack.
*/
/* Thread stack in /proc/PID/maps */
sprintf(new_path, "[stack:%d]", tid);
}
}
}
if (is_kernel_buf) {
memcpy((void*)copy_pos, &start, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &end, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &flags, 4);
copy_pos += 4;
memcpy((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1);
copy_pos += max_path_length;
} else {
//内核空间->用户空间交换数据
if (!!x_copy_to_user((void*)copy_pos, &start, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &end, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &flags, 4)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 4;
if (!!x_copy_to_user((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += max_path_length;
}
success++;
}
up_read_mmap_lock(mm);
mmput(mm);
return success;
}
#endif
#if MY_LINUX_VERSION_CODE == KERNEL_VERSION(3,18,71)
/* Check if the vma is being used as a stack by this task */
MY_STATIC int vm_is_stack_for_task(struct task_struct *t,
struct vm_area_struct *vma) {
return (vma->vm_start <= KSTK_ESP(t) && vma->vm_end >= KSTK_ESP(t));
}
/*
* Check if the vma is being used as a stack.
* If is_group is non-zero, check in the entire thread group or else
* just check in the current task. Returns the task_struct of the task
* that the vma is stack for. Must be called under rcu_read_lock().
*/
struct task_struct *task_of_stack(struct task_struct *task,
struct vm_area_struct *vma, bool in_group) {
if (vm_is_stack_for_task(task, vma))
return task;
if (in_group) {
struct task_struct *t;
for_each_thread(task, t) {
if (vm_is_stack_for_task(t, vma))
return t;
}
}
return NULL;
}
MY_STATIC pid_t pid_of_stack(struct task_struct *task,
struct vm_area_struct *vma, bool is_pid) {
pid_t ret = 0;
rcu_read_lock();
task = task_of_stack(task, vma, is_pid);
if (task) {
ret = task->pid;
}
rcu_read_unlock();
return ret;
}
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass) {
struct task_struct *task;
struct mm_struct *mm;
struct vm_area_struct *vma;
char new_path[MY_PATH_MAX_LEN];
char path_buf[MY_PATH_MAX_LEN];
int success = 0;
size_t copy_pos;
size_t end_pos;
if (max_path_length <= 0) {
return -1;
}
task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return -2;
}
mm = get_task_mm(task);
if (!mm) {
return -3;
}
if (is_kernel_buf) {
memset(lpBuf, 0, buf_size);
}
//else if (clear_user(lpBuf, buf_size)) { return -4; } //清空用户的缓冲区
copy_pos = (size_t)lpBuf;
end_pos = (size_t)((size_t)lpBuf + buf_size);
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return -4;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long start, end;
unsigned char flags[4];
struct file * vm_file;
if (copy_pos >= end_pos) {
if (have_pass) {
*have_pass = 1;
}
break;
}
start = vma->vm_start;
end = vma->vm_end;
flags[0] = vma->vm_flags & VM_READ ? '\x01' : '\x00';
flags[1] = vma->vm_flags & VM_WRITE ? '\x01' : '\x00';
flags[2] = vma->vm_flags & VM_EXEC ? '\x01' : '\x00';
flags[3] = vma->vm_flags & VM_MAYSHARE ? '\x01' : '\x00';
memset(new_path, 0, sizeof(new_path));
vm_file = get_vm_file(vma);
if (vm_file) {
char *path;
memset(path_buf, 0, sizeof(path_buf));
path = d_path(&vm_file->f_path, path_buf, sizeof(path_buf));
if (path > 0) {
strncat(new_path, path, sizeof(new_path) - 1);
}
} else if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[vdso]");
}
} else {
if (vma->vm_start <= mm->brk &&
vma->vm_end >= mm->start_brk) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[heap]");
}
} else {
pid_t tid = pid_of_stack(task, vma, 1);
if (tid != 0) {
/*
* Thread stack in /proc/PID/task/TID/maps or
* the main process stack.
*/
/* Thread stack in /proc/PID/maps */
if (vma->vm_start <= mm->start_stack &&
vma->vm_end >= mm->start_stack) {
if ((sizeof(new_path) - strlen(new_path) - 8) >= 0) {
strcat(new_path, "[stack]");
}
} else {
snprintf(new_path, sizeof(new_path), "[stack:%d]", tid);
}
}
}
}
if (is_kernel_buf) {
memcpy((void*)copy_pos, &start, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &end, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &flags, 4);
copy_pos += 4;
memcpy((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1);
copy_pos += max_path_length;
} else {
//内核空间->用户空间交换数据
if (!!x_copy_to_user((void*)copy_pos, &start, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &end, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &flags, 4)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 4;
if (!!x_copy_to_user((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += max_path_length;
}
success++;
}
up_read_mmap_lock(mm);
mmput(mm);
return success;
}
#endif
#if MY_LINUX_VERSION_CODE == KERNEL_VERSION(3,18,140)
/*
* Indicate if the VMA is a stack for the given task; for
* /proc/PID/maps that is the stack of the main task.
*/
MY_STATIC int is_stack(struct vm_area_struct *vma) {
/*
* We make no effort to guess what a given thread considers to be
* its "stack". It's not even well-defined for programs written
* languages like Go.
*/
return vma->vm_start <= vma->vm_mm->start_stack &&
vma->vm_end >= vma->vm_mm->start_stack;
}
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass) {
struct task_struct *task;
struct mm_struct *mm;
struct vm_area_struct *vma;
char new_path[MY_PATH_MAX_LEN];
char path_buf[MY_PATH_MAX_LEN];
int success = 0;
size_t copy_pos;
size_t end_pos;
if (max_path_length <= 0) {
return -1;
}
task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return -2;
}
mm = get_task_mm(task);
if (!mm) {
return -3;
}
if (is_kernel_buf) {
memset(lpBuf, 0, buf_size);
}
//else if (clear_user(lpBuf, buf_size)) { return -4; } //清空用户的缓冲区
copy_pos = (size_t)lpBuf;
end_pos = (size_t)((size_t)lpBuf + buf_size);
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return -4;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long start, end;
unsigned char flags[4];
struct file * vm_file;
if (copy_pos >= end_pos) {
if (have_pass) {
*have_pass = 1;
}
break;
}
start = vma->vm_start;
end = vma->vm_end;
flags[0] = vma->vm_flags & VM_READ ? '\x01' : '\x00';
flags[1] = vma->vm_flags & VM_WRITE ? '\x01' : '\x00';
flags[2] = vma->vm_flags & VM_EXEC ? '\x01' : '\x00';
flags[3] = vma->vm_flags & VM_MAYSHARE ? '\x01' : '\x00';
memset(new_path, 0, sizeof(new_path));
vm_file = get_vm_file(vma);
if (vm_file) {
char *path;
memset(path_buf, 0, sizeof(path_buf));
path = d_path(&vm_file->f_path, path_buf, sizeof(path_buf));
if (path > 0) {
strncat(new_path, path, sizeof(new_path) - 1);
}
} else if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[vdso]");
}
} else {
if (vma->vm_start <= mm->brk &&
vma->vm_end >= mm->start_brk) {
if ((sizeof(new_path) - strlen(new_path) - 7) >= 0) {
strcat(new_path, "[heap]");
}
} else {
if (is_stack(vma)) {
if ((sizeof(new_path) - strlen(new_path) - 8) >= 0) {
strcat(new_path, "[stack]");
}
}
}
}
if (is_kernel_buf) {
memcpy((void*)copy_pos, &start, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &end, 8);
copy_pos += 8;
memcpy((void*)copy_pos, &flags, 4);
copy_pos += 4;
memcpy((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1);
copy_pos += max_path_length;
} else {
//内核空间->用户空间交换数据
if (!!x_copy_to_user((void*)copy_pos, &start, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &end, 8)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 8;
if (!!x_copy_to_user((void*)copy_pos, &flags, 4)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += 4;
if (!!x_copy_to_user((void*)copy_pos, &new_path, max_path_length > MY_PATH_MAX_LEN ? MY_PATH_MAX_LEN : max_path_length - 1)) {
if (have_pass) {
*have_pass = 1;
}
break;
}
copy_pos += max_path_length;
}
success++;
}
up_read_mmap_lock(mm);
mmput(mm);
return success;
}
#endif
#if MY_LINUX_VERSION_CODE == KERNEL_VERSION(4,4,21)
/* Check if the vma is being used as a stack by this task */
int vma_is_stack_for_task(struct vm_area_struct *vma, struct task_struct *t) {
return (vma->vm_start <= KSTK_ESP(t) && vma->vm_end >= KSTK_ESP(t));
}
/*
* Indicate if the VMA is a stack for the given task; for
* /proc/PID/maps that is the stack of the main task.
*/
MY_STATIC int is_stack(struct task_struct *task,
struct vm_area_struct *vma, int is_pid) {
int stack = 0;
if (is_pid) {
stack = vma->vm_start <= vma->vm_mm->start_stack &&
vma->vm_end >= vma->vm_mm->start_stack;
} else {
rcu_read_lock();
stack = vma_is_stack_for_task(vma, task);
rcu_read_unlock();
}
return stack;
}
MY_STATIC int get_proc_maps_list(struct pid* proc_pid_struct, size_t max_path_length, char* lpBuf, size_t buf_size, bool is_kernel_buf, int *have_pass) {
struct task_struct *task;
struct mm_struct *mm;
struct vm_area_struct *vma;
char new_path[MY_PATH_MAX_LEN];
char path_buf[MY_PATH_MAX_LEN];
int success = 0;
size_t copy_pos;
size_t end_pos;
if (max_path_length <= 0) {
return -1;
}
task = pid_task(proc_pid_struct, PIDTYPE_PID);
if (!task) {
return -2;
}
mm = get_task_mm(task);
if (!mm) {
return -3;
}
if (is_kernel_buf) {
memset(lpBuf, 0, buf_size);
}
//else if (clear_user(lpBuf, buf_size)) { return -4; } //清空用户的缓冲区
copy_pos = (size_t)lpBuf;
end_pos = (size_t)((size_t)lpBuf + buf_size);
if (down_read_mmap_lock(mm) != 0) {
mmput(mm);
return -4;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long start, end;
unsigned char flags[4];
struct file * vm_file;
if (copy_pos >= end_pos) {
if (have_pass) {
*have_pass = 1;
}
break;
}
start = vma->vm_start;
end = vma->vm_end;
flags[0] = vma->vm_flags & VM_READ ? '\x01' : '\x00';
flags[1] = vma->vm_flags & VM_WRITE ? '\x01' : '\x00';
flags[2] = vma->vm_flags & VM_EXEC ? '\x01' : '\x00';
flags[3] = vma->vm_flags & VM_MAYSHARE ? '\x01' : '\x00';
memset(new_path, 0, sizeof(new_path));
vm_file = get_vm_file(vma);
if (vm_file) {
char *path;
memset(path_buf, 0, sizeof(path_buf));