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| author | Daniel J Walsh <dwalsh@redhat.com> | 2010-07-28 09:39:54 -0400 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2010-08-03 23:45:22 +0200 |
| commit | 56cf987fe74270bde4e16c7ec9e0414a9030723b (patch) | |
| tree | ba36afd8f8da67dd0ed744997a2e4167e2883cc6 /src/automount.c | |
| parent | 8b33e5ca72def2b79ffcd9b7e96f8f40f6bd4a20 (diff) | |
Systemd is causing mislabeled devices to be created and then attempting to read them.
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On 07/28/2010 05:57 AM, Kay Sievers wrote:
> On Wed, Jul 28, 2010 at 11:43, Lennart Poettering
> <lennart@poettering.net> wrote:
>> On Mon, 26.07.10 16:42, Daniel J Walsh (dwalsh@redhat.com) wrote:
>>> tcontext=system_u:object_r:device_t:s0 tclass=chr_file
>>> type=1400 audit(1280174589.476:7): avc: denied { read } for pid=1
>>> comm="systemd" name="autofs" dev=devtmpfs ino=9482
>>> scontext=system_u:system_r:init_t:s0
>>> tcontext=system_u:object_r:device_t:s0 tclass=chr_file
>>> type=1400 audit(1280174589.476:8): avc: denied { read } for pid=1
>>> comm="systemd" name="autofs" dev=devtmpfs ino=9482
>>> scontext=system_u:system_r:init_t:s0
>>> tcontext=system_u:object_r:device_t:s0 tclass=chr_file
>>>
>>> Lennart, we talked about this earlier. I think this is caused by the
>>> modprobe calls to create /dev/autofs. Since udev is not created at the
>>> point that init loads the kernel modules, the devices get created with
>>> the wrong label. Once udev starts the labels get fixed.
>>>
>>> I can allow init_t to read device_t chr_files.
>>
>> Hmm, I think a cleaner fix would be to make systemd relabel this device
>> properly before accessing it? Given that this is only one device this
>> should not be a problem for us to maintain, I think? How would the
>> fixing of the label work? Would we have to spawn restorecon for this, or
>> can we actually do this in C without too much work?
>
> I guess we can just do what udev is doing, and call setfilecon(), with
> a context of an earlier matchpathcon().
>
> Kay
> _______________________________________________
> systemd-devel mailing list
> systemd-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Here is the updated patch with a fix for the labeling of /dev/autofs
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Diffstat (limited to 'src/automount.c')
| -rw-r--r-- | src/automount.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/automount.c b/src/automount.c index 213b178eae..3a69cf9b4c 100644 --- a/src/automount.c +++ b/src/automount.c @@ -304,6 +304,8 @@ static int open_dev_autofs(Manager *m) { if (m->dev_autofs_fd >= 0) return m->dev_autofs_fd; + label_fix("/dev/autofs"); + if ((m->dev_autofs_fd = open("/dev/autofs", O_CLOEXEC|O_RDONLY)) < 0) { log_error("Failed to open /dev/autofs: %s", strerror(errno)); return -errno; |