Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752291AbbBWCUJ (ORCPT ); Sun, 22 Feb 2015 21:20:09 -0500 Received: from smtp2.provo.novell.com ([137.65.250.81]:44739 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751849AbbBWCUI (ORCPT ); Sun, 22 Feb 2015 21:20:08 -0500 Message-ID: <1424658000.6539.14.camel@stgolabs.net> Subject: [PATCH v2 1/3] kernel/audit: consolidate handling of mm->exe_file From: Davidlohr Bueso To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, paul@paul-moore.com, eparis@redhat.com, linux-audit@redhat.com, dave@stgolabs.net Date: Sun, 22 Feb 2015 18:20:00 -0800 In-Reply-To: <1424304641-28965-2-git-send-email-dbueso@suse.de> References: <1424304641-28965-1-git-send-email-dbueso@suse.de> <1424304641-28965-2-git-send-email-dbueso@suse.de> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.9 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3193 Lines: 112 This patch adds a audit_log_d_path_exe() helper function to share how we handle auditing of the exe_file's path. Used by both audit and auditsc. No functionality is changed. Signed-off-by: Davidlohr Bueso --- changes from v1: created normal function for helper. kernel/audit.c | 23 +++++++++++++++-------- kernel/audit.h | 3 +++ kernel/auditsc.c | 9 +-------- 3 files changed, 19 insertions(+), 16 deletions(-) diff --git a/kernel/audit.c b/kernel/audit.c index 72ab759..a71cbfe 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1838,11 +1838,24 @@ error_path: } EXPORT_SYMBOL(audit_log_task_context); +void audit_log_d_path_exe(struct audit_buffer *ab, + struct mm_struct *mm) +{ + if (!mm) { + audit_log_format(ab, " exe=(null)"); + return; + } + + down_read(&mm->mmap_sem); + if (mm->exe_file) + audit_log_d_path(ab, " exe=", &mm->exe_file->f_path); + up_read(&mm->mmap_sem); +} + void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) { const struct cred *cred; char comm[sizeof(tsk->comm)]; - struct mm_struct *mm = tsk->mm; char *tty; if (!ab) @@ -1878,13 +1891,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) audit_log_format(ab, " comm="); audit_log_untrustedstring(ab, get_task_comm(comm, tsk)); - if (mm) { - down_read(&mm->mmap_sem); - if (mm->exe_file) - audit_log_d_path(ab, " exe=", &mm->exe_file->f_path); - up_read(&mm->mmap_sem); - } else - audit_log_format(ab, " exe=(null)"); + audit_log_d_path_exe(ab, tsk->mm); audit_log_task_context(ab); } EXPORT_SYMBOL(audit_log_task_info); diff --git a/kernel/audit.h b/kernel/audit.h index 1caa0d3..d641f9b 100644 --- a/kernel/audit.h +++ b/kernel/audit.h @@ -257,6 +257,9 @@ extern struct list_head audit_filter_list[]; extern struct audit_entry *audit_dupe_rule(struct audit_krule *old); +extern void audit_log_d_path_exe(struct audit_buffer *ab, + struct mm_struct *mm); + /* audit watch functions */ #ifdef CONFIG_AUDIT_WATCH extern void audit_put_watch(struct audit_watch *watch); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index dc4ae70..84c74d0 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2361,7 +2361,6 @@ static void audit_log_task(struct audit_buffer *ab) kuid_t auid, uid; kgid_t gid; unsigned int sessionid; - struct mm_struct *mm = current->mm; char comm[sizeof(current->comm)]; auid = audit_get_loginuid(current); @@ -2376,13 +2375,7 @@ static void audit_log_task(struct audit_buffer *ab) audit_log_task_context(ab); audit_log_format(ab, " pid=%d comm=", task_pid_nr(current)); audit_log_untrustedstring(ab, get_task_comm(comm, current)); - if (mm) { - down_read(&mm->mmap_sem); - if (mm->exe_file) - audit_log_d_path(ab, " exe=", &mm->exe_file->f_path); - up_read(&mm->mmap_sem); - } else - audit_log_format(ab, " exe=(null)"); + audit_log_d_path_exe(ab, current->mm); } /** -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/