[PATCH V5 0/5] audit by executable name

Richard Guy Briggs
2014-10-03T03:06:51Z

This is a part of Peter Moody, my and Eric Paris' work to implement
audit by executable name.

Please see the accompanying userspace patch:
https://www.redhat.com/archives/linux-audit/2014-May/msg00019.html
The userspace interface is not expected to change appreciably unless something
important has been overlooked. Setting and deleting rules works as expected.

If the path does not exist at rule creation time, it will be re-evaluated every
time there is a change to the parent directory at which point the change in
device and inode will be noted.

Here's a sample run:

# /usr/local/sbin/auditctl -a always,exit -F dir=/tmp -F exe=/bin/touch -F key=touch_tmp
# /usr/local/sbin/ausearch --start recent -k touch_tmp
time->Mon Jun 30 14:15:06 2014
type=CONFIG_CHANGE msg=audit(1404152106.683:149): auid=0 ses=1 subj=unconfined_u :unconfined_r:auditctl_t:s0-s0:c0.c1023 op="add_rule" key="touch_tmp" list=4 res =1

# /usr/local/sbin/auditctl -l
-a always,exit -S all -F dir=/tmp -F exe=/bin/touch -F key=touch_tmp

# touch /tmp/test

# /usr/local/sbin/ausearch --start recent -k touch_tmp
time->Wed Jul 2 12:18:47 2014
type=UNKNOWN[1327] msg=audit(1404317927.319:132): proctitle=746F756368002F746D702F74657374
type=PATH msg=audit(1404317927.319:132): item=1 name="/tmp/test" inode=25997 dev=00:20 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE
type=PATH msg=audit(1404317927.319:132): item=0 name="/tmp/" inode=11144 dev=00:20 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype=PARENT
type=CWD msg=audit(1404317927.319:132): cwd="/root"
type=SYSCALL msg=audit(1404317927.319:132): arch=c000003e syscall=2 success=yes exit=3 a0=7ffffa403dd5 a1=941 a2=1b6 a3=34b65b2c6c items=2 ppid=4321 pid=6436 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0 ses=1 comm="touch" exe="/usr/bin/touch" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="touch_tmp"

Revision history:
v5: Revert patch "Let audit_free_rule() take care of calling
audit_remove_mark()." since it caused a group mark deadlock.

v4: Re-order and squash down fixups
Fix audit_dup_exe() to copy pathname string before calling audit_alloc_mark().

v3: Rationalize and rename some function names and clean up get/put and free code.
Rename several "watch" references to "mark".
Rename audit_remove_rule() to audit_remove_mark_rule().
Let audit_free_rule() take care of calling audit_remove_mark().
Put audit_alloc_mark() arguments in same order as watch, tree and inode.
Move the access to the entry for audit_match_signal() to the beginning
of the function in case the entry found is the same one passed in.
This will enable it to be used by audit_remove_mark_rule().
https://www.redhat.com/archives/linux-audit/2014-July/msg00000.html

v2: Misguided attempt to add in audit_exe similar to watches
https://www.redhat.com/archives/linux-audit/2014-June/msg00066.html

v1.5: eparis' switch to fsnotify
https://www.redhat.com/archives/linux-audit/2014-May/msg00046.html
https://www.redhat.com/archives/linux-audit/2014-May/msg00066.html

v1: Change to path interface instead of inode
https://www.redhat.com/archives/linux-audit/2014-May/msg00017.html

v0: Peter Moodie's original patches
https://www.redhat.com/archives/linux-audit/2012-August/msg00033.html

Next step:
Get full-path notify working.

Eric Paris (3):
audit: implement audit by executable
audit: clean simple fsnotify implementation
audit: convert audit_exe to audit_fsnotify

Richard Guy Briggs (2):
audit: avoid double copying the audit_exe path string
Revert "fixup! audit: clean simple fsnotify implementation"

include/linux/audit.h | 1 +
include/uapi/linux/audit.h | 2 +
kernel/Makefile | 2 +-
kernel/audit.h | 39 +++++++
kernel/audit_exe.c | 49 +++++++++
kernel/audit_fsnotify.c | 237 ++++++++++++++++++++++++++++++++++++++++++++
kernel/auditfilter.c | 52 +++++++++-
kernel/auditsc.c | 16 +++
8 files changed, 395 insertions(+), 3 deletions(-)
create mode 100644 kernel/audit_exe.c
create mode 100644 kernel/audit_fsnotify.c