[apparmor] Weird problem with LD_LIBRARY_PATH

Mon May 19 09:14:23 UTC 2014

Hmm, That's totally weird.

I have enabled debugging by executing the two lines you provided

# aa-complain /etc/apparmor.d/disable/opt.chromium.chromium.bin.chromium
Setting /etc/apparmor.d/disable/opt.chromium.chromium.bin.chromium to
complain mode.
# dmesg
[25817.356803] type=1400 audit(1400490612.786:61): apparmor="STATUS"
operation="profile_replace" name="/opt/chromium/chromium/chromium"
pid=32072 comm="apparmor_parser"
[25817.370668] type=1400 audit(1400490612.803:62): apparmor="STATUS"
operation="profile_replace" name="chromium_browser_sandbox" pid=32072
comm="apparmor_parser"
[25817.370983] type=1400 audit(1400490612.803:63): apparmor="STATUS"
operation="profile_replace" name="xdgsettings" pid=32072
comm="apparmor_parser"
[25817.380977] AppArmor: aa_free_profile(ffff8801832e4c00)
[25817.381019] AppArmor: aa_free_profile(ffff8801832e6000)
[25817.381034] AppArmor: aa_free_profile(ffff8801832e4800)
[25820.749065] grsec: process /usr/bin/strace(strace:32093) attached
to via ptrace by /usr/bin/strace[strace:32089] uid/euid:1000/1000
gid/egid:1000/1000, parent /usr/bin/bash[bash:30284]
uid/euid:1000/1000 gid/egid:1000/1000
[25820.749184] grsec: process /usr/bin/strace(strace:32094) attached
to via ptrace by /usr/bin/strace[strace:32089] uid/euid:1000/1000
gid/egid:1000/1000, parent /usr/bin/bash[bash:30284]
uid/euid:1000/1000 gid/egid:1000/1000

%> strace -s 1024 -o strace.out -ff ./chromium.sh
Failed to move to new PID namespace: Operation not permitted

On Fri, May 9, 2014 at 11:52 AM, John Johansen
<john.johansen at canonical.com> wrote:
> On 05/08/2014 06:01 PM, Aaron Lewis wrote:
>> Perhaps I could be restricting /opt/chromium/chromium/chromium.sh instead?
>>
> maybe, there are a couple things that could cause odd failures. Like scrubbing
> of environment variables.
>
> Can you turn of audit quieting and turn on debugging and then try? As root do
>
> echo -n "noquiet" > /sys/module/apparmor/parameters/audit
> echo 1 > /sys/module/apparmor/parameters/debug
>
> and then retry
> look in the dmesg log for output.
>
> another possibility is to try stracing of chromium and see which syscall it
> is failing on
>   strace -s 1024 -o strace.out -f chromium
>
> or what ever your command is to start it
>
>
>> Anyway, with aa-complain I see this: (strace)
>> rt_sigaction(SIGINT, {0x43b7b0, [], SA_RESTORER, 0x7573aec4fdf0},
>> {SIG_DFL, [], SA_RESTORER, 0x7573aec4fdf0}, 8) = 0
>> wait4(-1, /opt/chromium/chromium/chromium: error while loading shared
>> libraries: libicui18n.so.52: cannot open shared object file: No such
>> file or directory
>>
>> If I disable that profile, it just work
>>
>> In syslog I only saw this:
>>  [3311.099887] type=1400 audit(1399597036.453:60): apparmor="STATUS"
>> operation="profile_replace" name="/opt/chromium/chromium/chromium"
>> pid=29678 comm="apparmor_parser"
>> [ 3311.148516] type=1400 audit(1399597036.503:61): apparmor="STATUS"
>> operation="profile_replace" name="chromium_browser_sandbox" pid=29678
>> comm="apparmor_parser"
>> [ 3311.148835] type=1400 audit(1399597036.503:62): apparmor="STATUS"
>> operation="profile_replace" name="xdgsettings" pid=29678
>> comm="apparmor_parser"
>> [ 3320.977405] grsec: process /usr/bin/strace(strace:29737) attached
>> to via ptrace by /usr/bin/strace[strace:29735] uid/euid:1000/1000
>> gid/egid:1000/1000, parent /usr/bin/bash[bash:29692]
>> uid/euid:1000/1000 gid/egid:1000/1000
>>
>>
>> On Thu, May 8, 2014 at 10:07 AM, Aaron Lewis <the.warl0ck.1989 at gmail.com> wrote:
>>> That old version of libicuXXX does not exists anywhere else
>>>
>>> On Thu, May 8, 2014 at 10:06 AM, Aaron Lewis <the.warl0ck.1989 at gmail.com> wrote:
>>>> Too bad, there's no "denied" messages in syslog
>>>>
>>>> Not with aa-enforce or aa-complain.
>>>>
>>>> Also, I'm running old version of libicuXX.so.VERSION (Arch Linux)
>>>>
>>>> On Tue, May 6, 2014 at 1:38 PM, Seth Arnold <seth.arnold at canonical.com> wrote:
>>>>> On Tue, May 06, 2014 at 08:40:09AM +0800, Aaron Lewis wrote:
>>>>>>
>>>>>> %> cat /opt/chromium/chromium/chromium.sh
>>>>>> #!/bin/bash
>>>>>>
>>>>>> export LD_LIBRARY_PATH=/opt/chromium/libs/
>>>>>> /opt/chromium/chromium/chromium "$@"
>>>>>>
>>>>>> When I enforce the opt.chromium.chromium.chromium.sh policy, it says:
>>>>>> (No problem running it if aa is diabled)
>>>>>> %> /opt/chromium/chromium/chromium.sh
>>>>>> /opt/chromium/chromium/chromium: error while loading shared libraries:
>>>>>> libicui18n.so.52: cannot open shared object file: No such file or
>>>>>> directory
>>>>>>
>>>>>> But I already have: "/opt/chromium/libs/* rm," in that profile, anything wrong?
>>>>>>
>>>>>> That profile is for "/opt/chromium/chromium/chromium", not the script though
>>>>>
>>>>> LD_LIBRARY_PATH adds to the library path, it doesn't replace it entirely;
>>>>> on my system, this library is in /usr/lib/x86_64-linux-gnu/libicui18n.so.52.1
>>>>>
>>>>> Does this library exist in /opt/chromium/libs/ or elsewhere in a path
>>>>> referenced via /etc/ld.so.conf or one of ld.so's defaults?
>>>>> Does your profile allow 'rm' access to this library?
>>>>>
>>>>> Hopefully your system logs will contain more information; if not in
>>>>> /var/log/syslog then perhaps in /var/log/audit/audit.log.
>>>>>
>>>>> Thanks
>>>>>
>>>>> --
>>>>> AppArmor mailing list
>>>>> AppArmor at lists.ubuntu.com
>>>>> Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/apparmor
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Best Regards,
>>>> Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
>>>> Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33
>>>
>>>
>>>
>>> --
>>> Best Regards,
>>> Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
>>> Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33
>>
>>
>>
>

-- 
Best Regards,
Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33