[Verizon Samsung Galaxy S6] Smidley:
I actually might be interested in flashing KNOX back on, if only to test whether it fixes an issue I'm having with Titanium Backup. Titanium Backup cannot convert a user app to a system app for some reason. It hangs indefinitely on "Processing", and I have to kill the Titanium Backup service and cached app which in turn destroys the target app.

I feel like I've tried everything, e.g. various troubleshooting settings and updating SuperSU to 2.49 beta; I'm not sure if it's due to missing KNOX or an incompatibility with SELinux or something else...

This post led me to suspect that Titanium Backup may have an incompatibility with SELinux on the S6, but I couldn't say for sure.

Anyone else experiencing this issue where Titanium Backup is not able to convert user apps to system apps?

Here are the errors from logcat. Let me know if you want the full output.

E/audit ( 5716): type=1400 msg=audit(1432271526.701:223): avc: denied { read } for pid=11784 comm="tmp-mksh" name="lib" dev="sda21" ino=1115185 scontext=u:r:init:s0 tcontext=u:object_r:app_data_file:s0 tclass=lnk_file permissive=1
E/audit ( 5716): SEPF_SM-G920V_5.0.2_0009
E/audit ( 5716): type=1300 msg=audit(1432271526.701:223): arch=c00000b7 syscall=56 success=no exit=-2 a0=ffffff9c a1=7f77c3a508 a2=4000 a3=0 items=0 ppid=11769 ppcomm=daemonsu pid=11784 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm="tmp-mksh" exe="/tmp-mksh/tmp-mksh" subj=u:r:init:s0 key=(null)
E/audit ( 5716): type=1320 msg=audit(1432271526.701:223):
E/audit ( 5716): type=1400 msg=audit(1432271526.811:224): avc: denied { signal } for pid=12024 comm="busybox" scontext=u:r:init:s0 tcontext=u:r:knox_untrusted_app:s0 tclass=process permissive=1
E/audit ( 5716): SEPF_SM-G920V_5.0.2_0009
E/audit ( 5716): type=1300 msg=audit(1432271526.811:224): arch=40000028 syscall=37 success=yes exit=0 a0=297a a1=f a2=29 a3=ab16ad6c items=0 ppid=11784 ppcomm=tmp-mksh pid=12024 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm="busybox" exe="/data/data/com.keramidas.TitaniumBackup/files/busybox" subj=u:r:init:s0 key=(null)
E/audit ( 5716): type=1320 msg=audit(1432271526.811:224):
E/AffinityControl(12038): AffinityControl: registerfunction enter
E/AffinityControl(12042): AffinityControl: registerfunction enter
E/PackageManager( 3758): Inside updateOverlayMap enabledfalsepackageName =com.lexa.fakegps
E/PackageManager( 3758): Inside updateOverlayMap mOverlays = {com.sec.android.app.voicenote={}, com.samsung.SMT={}, com.samsung.android.sm={}, com.samsung.android.video={}, com.samsung.android.themecenter={}, com.android.calendar={}, com.sec.android.gallery3d={}, com.sec.android.widgetapp.dualclockdigital={}, com.samsung.android.email.widget={}, com.samsung.safetyinformation={}, com.sec.android.app.music={}, com.sec.android.app.vepreload={}, com.sec.android.inputmethod={}, com.android.contacts={}, com.samsung.android.email.composer={}, com.samsung.android.app.memo={}, com.sec.android.app.popupcalculator={}, com.samsung.spg={}, com.sec.hearingadjust={}, com.samsung.android.securitylogagent={}, com.sec.android.app.myfiles={}, com.android.settings={}, com.policydm={}, com.sec.android.app.FlashBarService={}, com.sec.android.widgetapp.digitalclock={}, com.sec.android.app.launcher={}, com.android.systemui={}, com.android.providers.media={}, com.sec.android.app.safetyassurance={}, com.sec.android.app.clockpackage={}, com.android.mms={}, com.samsung.android.email.ui={}, com.sec.android.widgetapp.ap.hero.accuweather={}, com.sec.android.app.wallpaperchooser={}}
E/SamsungIME( 4982): mOCRHelper is null
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12061): MountEmulatedStorage()
E/Zygote (12061): v2
E/SELinux (12061): [DEBUG] get_category: variable seinfo: platform sensitivity: NULL, cateogry: NULL
E/OTPFW ( 3758): ProvisionData::getAllEntries Table is empty
E/bauth_FPBAuthServiceStorage( 3037): UserID Directory is not existed
E/bauth_FPBAuthService( 3037): getEnrolledBioIdxList num templates is in DB is 0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12078): MountEmulatedStorage()
E/Zygote (12078): v2
E/SELinux (12078): [DEBUG] get_category: variable seinfo: platform sensitivity: NULL, cateogry: NULL
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12095): MountEmulatedStorage()
E/Zygote (12095): v2
E/SELinux (12095): [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12110): MountEmulatedStorage()
E/Zygote (12110): v2
E/SELinux (12110): [DEBUG] get_category: variable seinfo: platform sensitivity: NULL, cateogry: NULL
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12126): MountEmulatedStorage()
E/Zygote (12126): v2
E/SELinux (12126): [DEBUG] get_category: variable seinfo: untrusted sensitivity: NULL, cateogry: NULL
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12142): MountEmulatedStorage()
E/Zygote (12142): v2
E/SELinux (12142): [DEBUG] get_category: variable seinfo: samsung sensitivity: NULL, cateogry: NULL
E/audit ( 5716): type=1400 msg=audit(1432271528.381:225): avc: denied { rename } for pid=12170 comm="busybox" name=".tmp_com.keramidas.TitaniumBackup" dev="sda18" ino=2601 scontext=u:r:init:s0 tcontext=u:object_r:system_file:s0 tclass=file permissive=1
E/audit ( 5716): SEPF_SM-G920V_5.0.2_0009
E/audit ( 5716): type=1300 msg=audit(1432271528.381:225): arch=40000028 syscall=329 success=yes exit=0 a0=ffffff9c a1=ffc6c885 a2=ffffff9c a3=ffc6c8af items=0 ppid=11784 ppcomm=tmp-mksh pid=12170 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm="busybox" exe="/data/data/com.keramidas.TitaniumBackup/files/busybox" subj=u:r:init:s0 key=(null)
E/audit ( 5716): type=1320 msg=audit(1432271528.381:225):
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12182): MountEmulatedStorage()
E/Zygote (12182): v2
E/SELinux (12182): [DEBUG] get_category: variable seinfo: platform sensitivity: NULL, cateogry: NULL
E/NetworkScheduler.SchedulerReceiver( 4717): Invalid parameter app
E/NetworkScheduler.SchedulerReceiver( 4717): Invalid package name : Perhaps you didn't include a PendingIntent in the extras?
E/SPPClientService(12142): ============PushLog. commonIsShipBuild. stop!
E/SPPClientService(12142): [PushClientApplication] Push log off : This is Ship build version
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/ActivityManager( 3758): checkUser: useridlist=null, currentuser=0
E/Zygote (12241): MountEmulatedStorage()
E/Zygote (12241): v2
E/SELinux (12241): [DEBUG] get_category: variable seinfo: platform sensitivity: NULL, cateogry: NULL
E/audit ( 5716): type=1400 msg=audit(1432271528.961:226): avc: denied { unlink } for pid=12265 comm="rm" name="lib" dev="sda21" ino=1115185 scontext=u:r:init:s0 tcontext=u:object_r:app_data_file:s0 tclass=lnk_file permissive=1
E/audit ( 5716): SEPF_SM-G920V_5.0.2_0009
E/audit ( 5716): type=1300 msg=audit(1432271528.961:226): arch=c00000b7 syscall=35 success=yes exit=0 a0=ffffff9c a1=7f92d36138 a2=0 a3=62696c items=0 ppid=12264 ppcomm=tmp-mksh pid=12265 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm="rm" exe="/system/bin/toolbox" subj=u:r:init:s0 key=(null)

Thanks!