Are you running a gdbserver --attach from the init_shell?

On Fri, Feb 14, 2014 at 1:49 PM, Stephen Smalley
<[email protected]> wrote:
> So you are running the su daemon in the init domain (started via
> install-recovery.sh) and when it executes a shell, the default
> transition is to init_shell.  Which isn't really the way things are
> intended to work; this is a misuse of the pre-existing
> install-recovery.sh service to launch su and the fact that we happen
> to have a transition for shell commands launched by init*.rc files in
> our policy.  Given that we now explicitly label the console service
> via a seclabel entry and most of the init*.rc file shell command
> instances now also use seclabel, I wonder if we shouldn't get rid of
> init_shell altogether.
> Is anything running in zygote domain other than the zygote process
> itself?  ps -Z | grep zygote
> The sigchld denial means that either a process in the zygote domain is
> trying to send SIGCHLD to a process in the init_shell domain or a
> process in the init_shell domain is calling wait() on a process in the
> zygote domain.  Wouldn't normally expect zygote to be spawned from
> init_shell, so that seems wrong.
>
> On Fri, Feb 14, 2014 at 8:56 AM, Tomas <[email protected]> wrote:
>> Hi, I am getting sigchild denials below, that I cannot figure out.
>> They only appear when using su access. Eg. when root-explorer or other
>> utility list files or processes.
>> Not sure if I understand the message correct; who is actually sending the
>> sigchld and why is it denied?
>>
>> I am unable to find logs from other devices showing samme denial. Using same
>> BusyBox as many other.
>>
>> Thanks
>> Tomas
>>
>> { sigchld } for
>> pid=5594 comm="sh"
>> scontext=u:r:zygote:s0
>> tcontext=u:r:init_shell:s0
>> tclass=process
>>
>> # adb shell su 0 ps -Z | grep sh
>> u:r:adbd:s0                    shell     177   1     /sbin/adbd
>> u:r:shell:s0                   shell     5064  177   /system/bin/sh
>> u:r:init_shell:s0              root      5262  5260  sh
>> u:r:init_shell:s0              root      5496  5262  sh
>> u:r:init_shell:s0              root      5594  5593  sh
>>
>> -rwxr-xr-x root     shell             u:object_r:shell_exec:s0 mksh
>> lrwxrwxrwx root     root              u:object_r:shell_exec:s0 sh -> mksh
>>
>> ------ BusyBox: ------
>> root@android:/ # ps -Z | grep su
>> u:r:init:s0                    root      176   1     /system/xbin/su
>> u:r:su:s0                      root      5254  5064  su
>> u:r:su:s0                      root      5255  5254  su
>> u:r:init:s0                    root      5258  1     /system/xbin/su
>> u:r:init:s0                    root      5260  5258  /system/xbin/su
>> u:r:untrusted_app:s0           u0_a61    5589  1950  /system/bin/su
>> u:r:untrusted_app:s0           u0_a61    5590  5589  /system/bin/su
>> u:r:init:s0                    root      5592  1     /system/xbin/su
>> u:r:init:s0                    root      5593  5592  /system/xbin/su
>> u:r:su:s0                      root      6598  6297  su
>> u:r:su:s0                      root      6599  6598  su
>> u:r:init:s0                    root      6601  1     /system/xbin/su
>> u:r:init:s0                    root      6603  6601  /system/xbin/su
>>
>> # adb shell su 0 ls -Z /system/bin/ | grep su
>> lrwxrwxrwx root     root              u:object_r:system_file:s0 su ->
>> ../xbin/su
>> # adb shell su 0 ls -Z /system/xbin/| grep su
>> -rwsr-sr-x root     root              u:object_r:su_exec:s0 su
>>
>>
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