Re: audit 1.2.2 released
Michael C Thompson wrote:
Steve Grubb wrote:
> On Monday 15 May 2006 15:57, Michael C Thompson wrote:
>> auditctl is still reporting the "error sending rule" problem. Here are
>> my auditctl and kernel versions:
>>
>> auditctl version 1.2.2
>> 2.6.16-1.2200.2.2_FC6.lspp.25
>>
>> # auditctl -l
>> Error sending rule list request (Operation not permitted)
>
> This is not the error sending rule problem. This looks like a
> permission problem. What selinux policy and role are you doing this
> from? Are there any relevant AVCs in the audit logs from this time?
>
> -Steve
I've "enchanced" this transcript with strace output (selective) and the
return code of the selinux_socket_recvmsg call.
This is a transcript from Permissive mode, with role being staff_r. I
do
not see the "Error sending rule list request (Operation not permitted)"
when SELinux is disabled (selinux=0) or when as auditadm_r at SystemHigh.
# auditctl -l
sendto(3, "\20\0\0\0\365\3\5\0\1\0\0\0\0\0\0\0", 16, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 16
poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 100) = 1
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0\322\7\0\0\377\377\377\377\20\0"...,
8476, MSG_PEEK|MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0,
groups=00000000}, [12]) = 36
-> selinux_sock_recvmsg returns 0
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0\322\7\0\0\377\377\377\377\20\0"...,
8476, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000},
[12]) = 36
-> selinux_sock_recvmsg returns 0
write(2, "Error sending rule list request "..., 57Error sending rule
list request (Operation not permitted)) = 57
Error sending rule list request (Operation not permitted)
[ resulting log activity:
type=AVC msg=audit(1147657744.953:39): avc: denied { nlmsg_readpriv }
for pid=2091 comm="auditctl"
scontext=root:staff_r:staff_t:s0-s15:c0.c255
tcontext=root:staff_r:staff_t:s0-s15:c0.c255 tclass=netlink_audit_socket
type=SYSCALL msg=audit(1147657744.953:39): arch=40000003 syscall=102
success=yes exit=16 a0=b a1=bfad2760 a2=805b0f8 a3=10 items=0 ppid=2067
pid=2091 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
tty=pts1 comm="auditctl" exe="/sbin/auditctl"
subj=root:staff_r:staff_t:s0-s15:c0.c255
type=SOCKADDR msg=audit(1147657744.953:39): saddr=100000000000000000000000
type=SOCKETCALL msg=audit(1147657744.953:39): nargs=6 a0=3 a1=bfad69fc
a2=10 a3=0 a4=bfad2790 a5=c
]
# auditctl -l
sendto(3, "\20\0\0\0\365\3\5\0\1\0\0\0\0\0\0\0", 16, 0,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 16
poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 100) = 1
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0\326\7\0\0\0\0\0\0\20\0\0\0\365"...,
8476, MSG_PEEK|MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0,
groups=00000000}, [12]) = 36
-> selinux_sock_recvmsg returns 0
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0\326\7\0\0\0\0\0\0\20\0\0\0\365"...,
8476, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000},
[12]) = 36
-> selinux_sock_recvmsg returns 0
select(4, [3], NULL, NULL, {0, 100000}) = 1 (in [3], left {0, 100000})
recvfrom(3, "\20\0\0\0\3\0\2\0\1\0\0\0\326\7\0\0", 8476, MSG_DONTWAIT,
{sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 16
-> selinux_sock_recvmsg returns 0
No rules
[ no log activity ]
I do not know enough of about the auditctl code, but to me this looks
like auditctl is failing to issue the 3rd recvfrom syscall.
As a side note, auditctl is somehow executable by staff_t, but staff_t
can send to the netlink socket (although staff_t can estabish one).
Thanks,
Mike