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Message-ID: <20070105054337.GB1412@sergelap.austin.ibm.com>
Date: Thu, 4 Jan 2007 23:43:37 -0600
From: "Serge E. Hallyn" <serue@...ibm.com>
To: Andrew Morton <akpm@...l.org>
Cc: "Serge E. Hallyn" <serue@...ibm.com>,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -mm 0/8] user ns: Introduction
Quoting Andrew Morton (akpm@...l.org):
> On Thu, 4 Jan 2007 12:06:35 -0600
> "Serge E. Hallyn" <serue@...ibm.com> wrote:
>
> > This patchset adds a user namespace, which allows a process to
> > unshare its user_struct table, allowing for separate accounting
> > per user namespace.
>
> With these patches applied and with CONFIG_USER_NS=n, my selinux-enabled
> standard FC5 machine throws a complete fit:
>
> [ 12.323958] EDAC MC: Ver: 2.0.1 Jan 4 2007
> [ 12.357476] TCP cubic registered
> [ 12.360784] NET: Registered protocol family 1
> [ 12.364125] NET: Registered protocol family 17
> [ 12.367761] speedstep-centrino with X86_SPEEDSTEP_CENTRINO_ACPI config is deprecated.
> [ 12.367763] Use X86_ACPI_CPUFREQ (acpi-cpufreq) instead.
> [ 12.374666] Using IPI Shortcut mode
> [ 12.378222] Time: tsc clocksource has been installed.
> [ 12.381987] Time: acpi_pm clocksource has been installed.
> [ 12.386522] ACPI: (supports S0 S3 S4 S5)
> [ 6.344000] Freeing unused kernel memory: 184k freed
> [ 6.560000] input: PS/2 Mouse as /class/input/input1
> [ 6.580000] input: AlpsPS/2 ALPS GlidePoint as /class/input/input2
> [ 6.760000] Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> [ 6.764000] ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> [ 6.824000] EXT3-fs: INFO: recovery required on readonly filesystem.
> [ 6.824000] EXT3-fs: write access will be enabled during recovery.
> [ 10.832000] kjournald starting. Commit interval 5 seconds
> [ 10.836000] EXT3-fs: recovery complete.
> [ 10.840000] EXT3-fs: mounted filesystem with ordered data mode.
> [ 11.852000] audit(1167940353.844:2): enforcing=1 old_enforcing=0 auid=4294967295
> [ 11.948000] security: 3 users, 6 roles, 1417 types, 151 bools, 1 sens, 256 cats
> [ 11.952000] security: 57 classes, 41080 rules
> [ 11.956000] security: class key not defined in policy
> [ 11.956000] security: class context not defined in policy
> [ 11.960000] security: class dccp_socket not defined in policy
> [ 11.964000] security: permission dccp_recv in class node not defined in policy
> [ 11.964000] security: permission dccp_send in class node not defined in policy
> [ 11.968000] security: permission dccp_recv in class netif not defined in policy
> [ 11.972000] security: permission dccp_send in class netif not defined in policy
> [ 11.972000] security: permission setkeycreate in class process not defined in policy
> [ 11.976000] security: permission setsockcreate in class process not defined in policy
> [ 11.980000] security: permission polmatch in class association not defined in policy
> [ 11.980000] SELinux: Completing initialization.
> [ 11.984000] SELinux: Setting up existing superblocks.
> [ 12.004000] SELinux: initialized (dev sda6, type ext3), uses xattr
> [ 12.204000] SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> [ 12.208000] SELinux: initialized (dev debugfs, type debugfs), uses genfs_contexts
> [ 12.208000] SELinux: initialized (dev selinuxfs, type selinuxfs), uses genfs_contexts
> [ 12.212000] SELinux: initialized (dev mqueue, type mqueue), uses transition SIDs
> [ 12.216000] SELinux: initialized (dev hugetlbfs, type hugetlbfs), uses genfs_contexts
> [ 12.216000] SELinux: initialized (dev devpts, type devpts), uses transition SIDs
> [ 12.220000] SELinux: initialized (dev eventpollfs, type eventpollfs), uses genfs_contexts
> [ 12.224000] SELinux: initialized (dev inotifyfs, type inotifyfs), uses genfs_contexts
> [ 12.224000] SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> [ 12.228000] SELinux: initialized (dev futexfs, type futexfs), uses genfs_contexts
> [ 12.232000] SELinux: initialized (dev pipefs, type pipefs), uses task SIDs
> [ 12.232000] SELinux: initialized (dev sockfs, type sockfs), uses task SIDs
> [ 12.236000] SELinux: initialized (dev proc, type proc), uses genfs_contexts
> [ 12.240000] SELinux: initialized (dev bdev, type bdev), uses genfs_contexts
> [ 12.240000] SELinux: initialized (dev rootfs, type rootfs), uses genfs_contexts
> [ 12.244000] SELinux: initialized (dev sysfs, type sysfs), uses genfs_contexts
> [ 12.260000] audit(1167940354.256:3): policy loaded auid=4294967295
> [ 12.944000] SELinux: initialized (dev usbfs, type usbfs), uses genfs_contexts
> [ 15.376000] audit(1167969158.994:4): avc: denied { audit_write } for pid=386 comm="hwclock" capability=29 scontext=system_u:system_r:hwclock_t:s0 tcontext=system_u:system_r:hwclock_t:s0 tclass=capability
> [ 33.936000] audit(1167969177.567:2292): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.940000] audit(1167969177.579:2293): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.952000] audit(1167969177.591:2294): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.956000] audit(1167969177.607:2295): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.960000] audit(1167969177.615:2296): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.964000] audit(1167969177.627:2297): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.968000] audit(1167969177.639:2298): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.972000] audit(1167969177.651:2299): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.976000] audit(1167969177.667:2300): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.980000] audit(1167969177.679:2301): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> [ 33.984000] audit(1167969177.695:2302): avc: denied { search } for pid=2141 comm="klogd" name="/" dev=tmpfs ino=1225 scontext=system_u:system_r:klogd_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir
> <ad infinitum>
>
>
> Setting CONFIG_USER_NS=y fixes this.
Ok, I see. The CONFIG_USER_NS split is absolutely horrible. Should
really get rid of the user_ns pointers altogether when !CONFIG_USER_NS.
I'll try to fix it up without putting ifdefs all over - planning to send
a patch tomorrow.
thanks,
-serge
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