linux-kernel - [PATCH v2] audit: log module name on delete

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Message-Id: <f2f95a2d5154875f059d209e4b701d59a6aec0bd.1489078147.git.rgb@redhat.com>
Date:   Sat, 11 Mar 2017 21:24:27 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-audit@...hat.com
Cc:     Richard Guy Briggs <rgb@...hat.com>, Jessica Yu <jeyu@...hat.com>,
        Eric Paris <eparis@...hat.com>, Paul Moore <pmoore@...hat.com>,
        Steve Grubb <sgrubb@...hat.com>
Subject: [PATCH v2] audit: log module name on delete_module

When a sysadmin wishes to monitor module unloading with a syscall rule such as:
 -a always,exit -F arch=x86_64 -S delete_module -F key=mod-unload
the SYSCALL record doesn't tell us what module was requested for unloading.

Use the new KERN_MODULE auxiliary record to record it.
The SYSCALL record result code will list the return code.

See: https://github.com/linux-audit/audit-kernel/issues/37
    https://github.com/linux-audit/audit-kernel/issues/7
    https://github.com/linux-audit/audit-kernel/wiki/RFE-Module-Load-Record-Format

Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 kernel/module.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index 5432dbe..633f6da 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -943,6 +943,8 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
 		return -EFAULT;
 	name[MODULE_NAME_LEN-1] = '\0';
 
+	audit_log_kern_module(name);
+
 	if (mutex_lock_interruptible(&module_mutex) != 0)
 		return -EINTR;
 
-- 
1.7.1