selinux denies dmesg
Stephen Smalley
sds at tycho.nsa.gov
Fri Oct 17 14:32:53 UTC 2008
On Thu, 2008-10-16 at 15:27 -0700, Antonio Olivares wrote:
> Dear fellow selinux experts,
>
> After recovering from a kernel panic to check up on the filesystem, I run dmesg and I encounter some avc's
>
> [olivares at riohigh ~]$ dmesg | grep avc
> type=1400 audit(1224195506.669:4): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.669:5): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.669:6): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.669:7): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:8): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:9): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:10): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:11): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:12): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
> type=1400 audit(1224195506.670:13): avc: denied { sys_resource } for pid=1534 comm="dmesg" capability=24 scontext=system_u:system_r:dmesg_t:s0 tcontext=system_u:system_r:dmesg_t:s0 tclass=capability
>
>
> I have just updated to a newer kernel 2.6.27-13 and new selinux policy updates :)
>
> [olivares at riohigh ~]$ rpm -qa selinux*
> selinux-policy-3.5.12-2.fc10.noarch
> selinux-policy-targeted-3.5.12-2.fc10.noarch
> [olivares at riohigh ~]$
>
>
> What do I do?
Enable syscall auditing and find out what syscall triggered the
CAP_SYS_RESOURCE check.
--
Stephen Smalley
National Security Agency
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