| 1 |
Hello everyone |
| 2 |
|
| 3 |
I've put Gentoo-Hardened on a testing computer and been learning a lot about |
| 4 |
selinux. Everything works, including X, but I have a few entries in my avc log |
| 5 |
that I'm not sure about. |
| 6 |
|
| 7 |
I note that this is running on an encrypted root drive and therefore I need an |
| 8 |
initramfs. Dracut wasn't working for me so I rolled my own, which does boot in |
| 9 |
enforcing mode (with a few minor errors) so bug 397567 seems to not be |
| 10 |
universal. So some of these errors may be due to the initramfs then, although |
| 11 |
I'm not sure why, since almost everything is unmounted before switch_root. |
| 12 |
|
| 13 |
avc: denied { read write } for pid=1 comm="init" |
| 14 |
path=2F6465762F636F6E736F6C65202864656C6574656429 dev="rootfs" ino=5998 |
| 15 |
scontext=system_u:system_r:init_t tcontext=system_u:object_r:root_t |
| 16 |
tclass=chr_file |
| 17 |
avc: denied { getattr } for pid=1 comm="init" name="/" dev="selinuxfs" |
| 18 |
ino=1 scontext=system_u:system_r:init_t tcontext=system_u:object_r:security_t |
| 19 |
tclass=filesystem |
| 20 |
avc: denied { search } for pid=1 comm="init" name="var" dev="dm-0" |
| 21 |
ino=556492 scontext=system_u:system_r:init_t tcontext=system_u:object_r:file_t |
| 22 |
tclass=dir |
| 23 |
avc: denied { write } for pid=400 comm="cryptsetup" name="read_ahead_kb" |
| 24 |
dev="sysfs" ino=14972 scontext=system_u:system_r:lvm_t |
| 25 |
tcontext=system_u:object_r:sysfs_t tclass=file |
| 26 |
avc: denied { getattr } for pid=411 comm="mkswap" name="/" dev="selinuxfs" |
| 27 |
ino=1 scontext=system_u:system_r:fsadm_t tcontext=system_u:object_r:security_t |
| 28 |
tclass=filesystem |
| 29 |
avc: denied { getattr } for pid=20 comm="kdevtmpfs" path="/dm-2" |
| 30 |
dev="devtmpfs" ino=6891 scontext=system_u:system_r:kernel_t |
| 31 |
tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file |
| 32 |
avc: denied { read } for pid=1019 comm="syslog-ng" path="/dev/console" |
| 33 |
dev="devtmpfs" ino=1039 scontext=system_u:system_r:syslogd_t |
| 34 |
tcontext=system_u:object_r:console_device_t tclass=chr_file |
| 35 |
avc: denied { read write } for pid=1084 comm="unix_chkpwd" path="/dev/tty1" |
| 36 |
dev="devtmpfs" ino=1045 scontext=system_u:system_r:chkpwd_t |
| 37 |
tcontext=system_u:object_r:tty_device_t tclass=chr_file |
| 38 |
avc: denied { search } for pid=1084 comm="unix_chkpwd" name="/" dev="sysfs" |
| 39 |
ino=1 scontext=system_u:system_r:chkpwd_t tcontext=system_u:object_r:sysfs_t |
| 40 |
tclass=dir |
| 41 |
avc: denied { getattr } for pid=1084 comm="unix_chkpwd" name="/" |
| 42 |
dev="selinuxfs" ino=1 scontext=system_u:system_r:chkpwd_t |
| 43 |
tcontext=system_u:object_r:security_t tclass=filesystem |
| 44 |
avc: denied { getattr } for pid=1084 comm="unix_chkpwd" |
| 45 |
path="/sys/fs/selinux" dev="selinuxfs" ino=1 |
| 46 |
scontext=system_u:system_r:chkpwd_t tcontext=system_u:object_r:security_t |
| 47 |
tclass=dir |
| 48 |
|
| 49 |
Particularly, I get a lot of unix_chkpwd denials. There's a few more errors |
| 50 |
sometimes: |
| 51 |
|
| 52 |
avc: denied { setattr } for pid=20 comm="kdevtmpfs" name="dm-2" |
| 53 |
dev="devtmpfs" ino=1973 scontext=system_u:system_r:kernel_t |
| 54 |
tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file |
| 55 |
avc: denied { unlink } for pid=20 comm="kdevtmpfs" name="dm-2" |
| 56 |
dev="devtmpfs" ino=1973 scontext=system_u:system_r:kernel_t |
| 57 |
tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file |
| 58 |
avc: denied { module_request } for pid=977 comm="sshd" kmod="net-pf-10" |
| 59 |
scontext=system_u:system_r:sshd_t tcontext=system_u:system_r:kernel_t |
| 60 |
tclass=system |
| 61 |
avc: denied { use } for pid=977 comm="sshd" path="/dev/console" |
| 62 |
dev="devtmpfs" ino=1039 scontext=system_u:system_r:sshd_t |
| 63 |
tcontext=system_u:system_r:init_t tclass=fd |
| 64 |
avc: denied { use } for pid=991 comm="cron" path="/dev/console" |
| 65 |
dev="devtmpfs" ino=1039 scontext=system_u:system_r:crond_t |
| 66 |
tcontext=system_u:system_r:init_t tclass=fd |
| 67 |
avc: denied { read } for pid=127 comm="rc" name="openrc" dev="dm-0" |
| 68 |
ino=591026 scontext=system_u:system_r:initrc_t |
| 69 |
tcontext=system_u:object_r:file_t tclass=lnk_file |
| 70 |
avc: denied { read } for pid=354 comm="hwclock" path="/dev/console" |
| 71 |
dev="devtmpfs" ino=1039 scontext=system_u:system_r:hwclock_t |
| 72 |
tcontext=system_u:object_r:console_device_t tclass=chr_file |
| 73 |
avc: denied { search } for pid=1396 comm="X" name="1395" dev="proc" |
| 74 |
ino=3997 scontext=user_u:user_r:xserver_t tcontext=user_u:user_r:user_t |
| 75 |
tclass=dir |
| 76 |
avc: denied { read } for pid=1396 comm="X" name="cmdline" dev="proc" |
| 77 |
ino=3998 scontext=user_u:user_r:xserver_t tcontext=user_u:user_r:user_t |
| 78 |
tclass=file |
| 79 |
avc: denied { open } for pid=1396 comm="X" path="/proc/1395/cmdline" |
| 80 |
dev="proc" ino=3998 scontext=user_u:user_r:xserver_t |
| 81 |
tcontext=user_u:user_r:user_t tclass=file |
| 82 |
|
| 83 |
|
| 84 |
Thoughts? |
| 85 |
Thanks |
| 86 |
|
| 87 |
BennyP |
Archives