root/lib/audit.c

DEFINITIONS

1. audit_classify_arch
2. audit_classify_syscall
3. audit_classes_init

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/init.h>
   3 #include <linux/types.h>
   4 #include <linux/audit.h>
   5 #include <asm/unistd.h>
   6 
   7 static unsigned dir_class[] = {
   8 #include <asm-generic/audit_dir_write.h>
   9 ~0U
  10 };
  11 
  12 static unsigned read_class[] = {
  13 #include <asm-generic/audit_read.h>
  14 ~0U
  15 };
  16 
  17 static unsigned write_class[] = {
  18 #include <asm-generic/audit_write.h>
  19 ~0U
  20 };
  21 
  22 static unsigned chattr_class[] = {
  23 #include <asm-generic/audit_change_attr.h>
  24 ~0U
  25 };
  26 
  27 static unsigned signal_class[] = {
  28 #include <asm-generic/audit_signal.h>
  29 ~0U
  30 };
  31 
  32 int audit_classify_arch(int arch)
  33 {
  34         if (audit_is_compat(arch))
  35                 return 1;
  36         else
  37                 return 0;
  38 }
  39 
  40 int audit_classify_syscall(int abi, unsigned syscall)
  41 {
  42         if (audit_is_compat(abi))
  43                 return audit_classify_compat_syscall(abi, syscall);
  44 
  45         switch(syscall) {
  46 #ifdef __NR_open
  47         case __NR_open:
  48                 return 2;
  49 #endif
  50 #ifdef __NR_openat
  51         case __NR_openat:
  52                 return 3;
  53 #endif
  54 #ifdef __NR_socketcall
  55         case __NR_socketcall:
  56                 return 4;
  57 #endif
  58 #ifdef __NR_execveat
  59         case __NR_execveat:
  60 #endif
  61         case __NR_execve:
  62                 return 5;
  63         default:
  64                 return 0;
  65         }
  66 }
  67 
  68 static int __init audit_classes_init(void)
  69 {
  70 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
  71         audit_register_class(AUDIT_CLASS_WRITE_32, compat_write_class);
  72         audit_register_class(AUDIT_CLASS_READ_32, compat_read_class);
  73         audit_register_class(AUDIT_CLASS_DIR_WRITE_32, compat_dir_class);
  74         audit_register_class(AUDIT_CLASS_CHATTR_32, compat_chattr_class);
  75         audit_register_class(AUDIT_CLASS_SIGNAL_32, compat_signal_class);
  76 #endif
  77         audit_register_class(AUDIT_CLASS_WRITE, write_class);
  78         audit_register_class(AUDIT_CLASS_READ, read_class);
  79         audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
  80         audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
  81         audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
  82         return 0;
  83 }
  84 
  85 __initcall(audit_classes_init);