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83230351c5
audit_log_start() returns audit_buffer pointer on success or NULL on
error, so it is better to check the return value of it.
Fixes: 3323eec921 ("integrity: IMA as an integrity service provider")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2008 IBM Corporation
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* Author: Mimi Zohar <zohar@us.ibm.com>
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*
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* File: integrity_audit.c
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* Audit calls for the integrity subsystem
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*/
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#include <linux/fs.h>
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#include <linux/gfp.h>
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#include <linux/audit.h>
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#include "integrity.h"
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static int integrity_audit_info;
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/* ima_audit_setup - enable informational auditing messages */
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static int __init integrity_audit_setup(char *str)
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{
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unsigned long audit;
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if (!kstrtoul(str, 0, &audit))
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integrity_audit_info = audit ? 1 : 0;
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return 1;
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}
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__setup("integrity_audit=", integrity_audit_setup);
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void integrity_audit_msg(int audit_msgno, struct inode *inode,
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const unsigned char *fname, const char *op,
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const char *cause, int result, int audit_info)
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{
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integrity_audit_message(audit_msgno, inode, fname, op, cause,
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result, audit_info, 0);
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}
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void integrity_audit_message(int audit_msgno, struct inode *inode,
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const unsigned char *fname, const char *op,
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const char *cause, int result, int audit_info,
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int errno)
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{
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struct audit_buffer *ab;
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char name[TASK_COMM_LEN];
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if (!integrity_audit_info && audit_info == 1) /* Skip info messages */
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return;
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ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
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if (!ab)
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return;
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audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
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task_pid_nr(current),
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from_kuid(&init_user_ns, current_uid()),
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from_kuid(&init_user_ns, audit_get_loginuid(current)),
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audit_get_sessionid(current));
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audit_log_task_context(ab);
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audit_log_format(ab, " op=%s cause=%s comm=", op, cause);
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audit_log_untrustedstring(ab, get_task_comm(name, current));
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if (fname) {
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audit_log_format(ab, " name=");
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audit_log_untrustedstring(ab, fname);
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}
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if (inode) {
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audit_log_format(ab, " dev=");
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audit_log_untrustedstring(ab, inode->i_sb->s_id);
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audit_log_format(ab, " ino=%lu", inode->i_ino);
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}
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audit_log_format(ab, " res=%d errno=%d", !result, errno);
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audit_log_end(ab);
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}
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