integrity_audit.c 1.9 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (C) 2008 IBM Corporation
  4. * Author: Mimi Zohar <zohar@us.ibm.com>
  5. *
  6. * File: integrity_audit.c
  7. * Audit calls for the integrity subsystem
  8. */
  9. #include <linux/fs.h>
  10. #include <linux/gfp.h>
  11. #include <linux/audit.h>
  12. #include "integrity.h"
  13. static int integrity_audit_info;
  14. /* ima_audit_setup - enable informational auditing messages */
  15. static int __init integrity_audit_setup(char *str)
  16. {
  17. unsigned long audit;
  18. if (!kstrtoul(str, 0, &audit))
  19. integrity_audit_info = audit ? 1 : 0;
  20. return 1;
  21. }
  22. __setup("integrity_audit=", integrity_audit_setup);
  23. void integrity_audit_msg(int audit_msgno, struct inode *inode,
  24. const unsigned char *fname, const char *op,
  25. const char *cause, int result, int audit_info)
  26. {
  27. integrity_audit_message(audit_msgno, inode, fname, op, cause,
  28. result, audit_info, 0);
  29. }
  30. void integrity_audit_message(int audit_msgno, struct inode *inode,
  31. const unsigned char *fname, const char *op,
  32. const char *cause, int result, int audit_info,
  33. int errno)
  34. {
  35. struct audit_buffer *ab;
  36. char name[TASK_COMM_LEN];
  37. if (!integrity_audit_info && audit_info == 1) /* Skip info messages */
  38. return;
  39. ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
  40. if (!ab)
  41. return;
  42. audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
  43. task_pid_nr(current),
  44. from_kuid(&init_user_ns, current_uid()),
  45. from_kuid(&init_user_ns, audit_get_loginuid(current)),
  46. audit_get_sessionid(current));
  47. audit_log_task_context(ab);
  48. audit_log_format(ab, " op=%s cause=%s comm=", op, cause);
  49. audit_log_untrustedstring(ab, get_task_comm(name, current));
  50. if (fname) {
  51. audit_log_format(ab, " name=");
  52. audit_log_untrustedstring(ab, fname);
  53. }
  54. if (inode) {
  55. audit_log_format(ab, " dev=");
  56. audit_log_untrustedstring(ab, inode->i_sb->s_id);
  57. audit_log_format(ab, " ino=%lu", inode->i_ino);
  58. }
  59. audit_log_format(ab, " res=%d errno=%d", !result, errno);
  60. audit_log_end(ab);
  61. }