From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f43.google.com (mail-qg0-f43.google.com [209.85.192.43]) by kanga.kvack.org (Postfix) with ESMTP id B24326B0032 for ; Mon, 23 Feb 2015 16:59:07 -0500 (EST) Received: by mail-qg0-f43.google.com with SMTP id i50so26973077qgf.2 for ; Mon, 23 Feb 2015 13:59:07 -0800 (PST) Received: from mail-qg0-f53.google.com (mail-qg0-f53.google.com. [209.85.192.53]) by mx.google.com with ESMTPS id x10si4851440qal.19.2015.02.23.13.59.06 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Feb 2015 13:59:06 -0800 (PST) Received: by mail-qg0-f53.google.com with SMTP id f51so26981525qge.12 for ; Mon, 23 Feb 2015 13:59:06 -0800 (PST) From: Paul Moore Subject: Re: [PATCH v2 1/3] kernel/audit: consolidate handling of mm->exe_file Date: Mon, 23 Feb 2015 16:59:05 -0500 Message-ID: <1579072.xrgTk0Bmz6@sifl> In-Reply-To: <1424658000.6539.14.camel@stgolabs.net> References: <1424304641-28965-1-git-send-email-dbueso@suse.de> <1424304641-28965-2-git-send-email-dbueso@suse.de> <1424658000.6539.14.camel@stgolabs.net> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: owner-linux-mm@kvack.org List-ID: To: Davidlohr Bueso Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, eparis@redhat.com, linux-audit@redhat.com On Sunday, February 22, 2015 06:20:00 PM Davidlohr Bueso wrote: > 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(-) Merged into audit#next. > 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); > } > > /** -- paul moore www.paul-moore.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org