Daniel J Walsh wrote:
Paul Howarth wrote:
On my file/web/samba/nfs server I have a software archive, which I serve
out using both samba and httpd. So the whole thing as
public_content_rw_t, and the appropriate boolean set so that samba can
write to it.
On the software archive I have DVD ISO images of FC4 and FC5. I have
fstab entries for these to loopback mount them as follows:
/srv/softlib/fedora/stentz/FC4-i386-DVD.iso
/srv/softlib/fedora/stentz/dvd iso9660
ro,loop,fscontext=system_u:object_r:public_content_t 0 0
/srv/softlib/fedora/bordeaux/FC-5-i386-DVD.iso
/srv/softlib/fedora/bordeaux/dvd iso9660
ro,loop,fscontext=system_u:object_r:public_content_t 0 0
Unfortunately the mount won't work at boot time because mount is
confined to the mount_t domain, which can't read public_content_rw_t:
Apr 21 08:40:21 badby kernel: audit(1145605218.512:331): avc: denied
{ read } for pid=1469 comm="mount" name="FC4-i386-DVD.iso" dev=dm-5
ino=1032205 scontext=system_u:system_r:mount_t:s0
tcontext=system_u:object_r:public_content_rw_t:s0 tclass=file
Apr 21 08:40:21 badby kernel: audit(1145605218.564:332): avc: denied
{ read } for pid=1469 comm="mount" name="FC-5-i386-DVD.iso" dev=dm-5
ino=606259 scontext=system_u:system_r:mount_t:s0
tcontext=root:object_r:public_content_rw_t:s0 tclass=file
A "mount -a" after booting works fine as it then runs unconfined.
Is this something that should be generally allowed or should I just
write local policy to fix this?
Adding boolean allow_mount_anyfile, to handle these situations.
It now gets denied in a different way:
type=AVC msg=audit(1149761176.924:18354): avc: denied { mounton } for
pid=10977 comm="mount" name="dvd" dev=dm-5 ino=1032207
scontext=root:system_r:mount_t:s0
tcontext=system_u:object_r:public_content_rw_t:s0 tclass=dir
type=SYSCALL msg=audit(1149761176.924:18354): arch=40000003 syscall=21
success=no exit=-13 a0=a002ab0 a1=a002ac0 a2=9ffefc0 a3=c0ed0001 items=1
pid=10977 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0
comm="mount" exe="/bin/mount"
type=AVC_PATH msg=audit(1149761176.924:18354):
path="/srv/softlib/fedora/stentz/dvd"
type=CWD msg=audit(1149761176.924:18354): cwd="/"
type=PATH msg=audit(1149761176.924:18354): item=0
name="/srv/softlib/fedora/stentz/dvd" flags=1 inode=1032207 dev=fd:05
mode=040755 ouid=503 ogid=503 rdev=00:00
Paul.
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