VM is shutting down while I set a new iptables rule on Android to filter chromecast rtp streams

what I did is to set an iptalbes rule for chromecast screen mirror packets filtering on Android, but I find "Shutting down VM" after I typed in this command and hit enter.

Why would this happen...? And how to avoid this and make iptables rule work? Thanks!

Command I used:

su -c "iptables -A OUTPUT -p udp --sport 2346 -m u32 --u32 \"26&0x000000FF=0x0000007F\" -j DROP"

And here are logs I captured with logcat:

I/SHELL   ( 7632): START1
I/SHELL   ( 7632): START2: 12578
I/SHELL   ( 7632): GETINPUT
I/SHELL   ( 7632): GETOUTPUT
I/SHELL   ( 7632): GETERROR
E/WifiStateMachine(  792): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=157.29 rxSuccessRate=235.30 targetRoamBSSID=c0:ff:d4:af:ab:0b RSSI=-46




W/iptables(12620): type=1400 audit(0.0:20): avc: denied { create } for scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
W/iptables(12620): type=1400 audit(0.0:21): avc: denied { getopt } for lport=255 scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
W/iptables(12620): type=1400 audit(0.0:22): avc: denied { setopt } for lport=255 scontext=u:r:init:s0 tcontext=u:r:init:s0 tclass=rawip_socket
D/AndroidRuntime(12634):
D/AndroidRuntime(12634): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
W/app_process32_o(12634): type=1400 audit(0.0:23): avc: denied { write } for name="system@framework@boot.art" dev="mmcblk0p28" ino=105876 scontext=u:r:shell:s0 tcontext=u:object_r:dalvikcache_data_file:s0 tclass=file
D/AndroidRuntime(12634): CheckJNI is OFF
W/app_process32_o(12634): type=1400 audit(0.0:23): avc: denied { write } for name="system@framework@boot.art" dev="mmcblk0p28" ino=105876 scontext=u:r:shell:s0 tcontext=u:object_r:dalvikcache_data_file:s0 tclass=file
D/AndroidRuntime(12634): Calling main entry com.android.commands.am.Am
I/ActivityManager(  792): Start proc eu.chainfire.supersu for broadcast eu.chainfire.supersu/.NativeAccessReceiver: pid=12656 uid=10095 gids={50095, 9997} abi=armeabi-v7a
D/AndroidRuntime(12634): Shutting down VM
D/OpenGLRenderer(12656): Render dirty regions requested: true
D/Atlas   (12656): Validating map...
I/Adreno-EGL(12656): <qeglDrvAPI_eglInitialize:410>: QUALCOMM Build: 10/24/14, 167c270, I68fa98814b
I/OpenGLRenderer(12656): Initialized EGL, version 1.4
D/OpenGLRenderer(12656): Enabling debug mode 0
E/NetworkSession( 6982): Send datagram failed, 199/200 retries left
E/NetworkSession( 6982): Send datagram failed, 198/200 retries left
E/NetworkSession( 6982): Send datagram failed, 197/200 retries left
E/NetworkSession( 6982): Send datagram failed, 196/200 retries left
E/NetworkSession( 6982): Send datagram failed, 195/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 193/200 retries left
E/NetworkSession( 6982): Send datagram failed, 192/200 retries left
E/NetworkSession( 6982): Send datagram failed, 191/200 retries left
E/NetworkSession( 6982): Send datagram failed, 190/200 retries left
E/NetworkSession( 6982): Send datagram failed, 189/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 187/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 184/200 retries left
E/NetworkSession( 6982): Send datagram failed, 183/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 180/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 177/200 retries left
E/NetworkSession( 6982): Send datagram failed, 176/200 retries left
E/NetworkSession( 6982): Send datagram failed, 175/200 retries left
E/NetworkSession( 6982): Send datagram failed, 174/200 retries left
E/NetworkSession( 6982): Send datagram failed, 173/200 retries left
E/NetworkSession( 6982): Send datagram failed, 172/200 retries left
E/NetworkSession( 6982): Send datagram failed, 171/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 157/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 148/200 retries left
E/NetworkSession( 6982): Send datagram failed, 147/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 144/200 retries left
E/NetworkSession( 6982): Send datagram failed, 143/200 retries left
E/NetworkSession( 6982): Send datagram failed, 142/200 retries left
E/NetworkSession( 6982): Send datagram failed, 141/200 retries left
E/NetworkSession( 6982): Send datagram failed, 140/200 retries left
E/NetworkSession( 6982): Send datagram failed, 139/200 retries left
E/NetworkSession( 6982): Send datagram failed, 138/200 retries left
E/NetworkSession( 6982): Send datagram failed, 137/200 retries left
E/NetworkSession( 6982): Send datagram failed, 136/200 retries left
E/NetworkSession( 6982): Send datagram failed, 135/200 retries left
E/NetworkSession( 6982): Send datagram failed, 134/200 retries left
E/NetworkSession( 6982): Send datagram failed, 133/200 retries left
E/NetworkSession( 6982): Send datagram failed, 132/200 retries left
E/NetworkSession( 6982): Send datagram failed, 131/200 retries left
E/NetworkSession( 6982): Send datagram failed, 130/200 retries left
E/NetworkSession( 6982): Send datagram failed, 129/200 retries left
E/NetworkSession( 6982): Send datagram failed, 128/200 retries left
E/NetworkSession( 6982): Send datagram failed, 127/200 retries left
E/NetworkSession( 6982): Send datagram failed, 126/200 retries left
E/NetworkSession( 6982): Send datagram failed, 125/200 retries left
E/NetworkSession( 6982): Send datagram failed, 124/200 retries left
E/NetworkSession( 6982): Send datagram failed, 123/200 retries left
E/NetworkSession( 6982): Send datagram failed, 122/200 retries left
E/NetworkSession( 6982): Send datagram failed, 121/200 retries left
E/NetworkSession( 6982): Send datagram failed, 120/200 retries left
E/NetworkSession( 6982): Send datagram failed, 119/200 retries left
E/NetworkSession( 6982): Send datagram failed, 118/200 retries left
E/NetworkSession( 6982): Send datagram failed, 117/200 retries left
E/NetworkSession( 6982): Send datagram failed, 116/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 114/200 retries left
E/NetworkSession( 6982): Send datagram failed, 113/200 retries left
E/NetworkSession( 6982): Send datagram failed, 112/200 retries left
E/NetworkSession( 6982): Send datagram failed, 111/200 retries left
E/NetworkSession( 6982): Send datagram failed, 110/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 107/200 retries left
E/NetworkSession( 6982): Send datagram failed, 106/200 retries left
E/NetworkSession( 6982): Send datagram failed, 105/200 retries left
E/NetworkSession( 6982): Send datagram failed, 104/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 102/200 retries left
E/NetworkSession( 6982): Send datagram failed, 101/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 98/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 94/200 retries left
E/NetworkSession( 6982): Send datagram failed, 93/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 90/200 retries left
E/NetworkSession( 6982): Send datagram failed, 89/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 87/200 retries left
E/NetworkSession( 6982): Send datagram failed, 86/200 retries left
E/NetworkSession( 6982): Send datagram failed, 85/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 78/200 retries left
E/NetworkSession( 6982): Send datagram failed, 77/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 69/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 67/200 retries left
E/NetworkSession( 6982): Send datagram failed, 66/200 retries left
E/NetworkSession( 6982): Send datagram failed, 65/200 retries left
E/NetworkSession( 6982): Send datagram failed, 64/200 retries left
E/NetworkSession( 6982): Send datagram failed, 63/200 retries left
E/NetworkSession( 6982): Send datagram failed, 62/200 retries left
E/NetworkSession( 6982): Send datagram failed, 61/200 retries left
E/NetworkSession( 6982): Send datagram failed, 60/200 retries left
E/NetworkSession( 6982): Send datagram failed, 59/200 retries left
E/NetworkSession( 6982): Send datagram failed, 58/200 retries left
E/NetworkSession( 6982): Send datagram failed, 57/200 retries left
E/NetworkSession( 6982): Send datagram failed, 56/200 retries left
E/NetworkSession( 6982): Send datagram failed, 55/200 retries left
E/NetworkSession( 6982): Send datagram failed, 54/200 retries left
E/NetworkSession( 6982): Send datagram failed, 53/200 retries left
E/NetworkSession( 6982): Send datagram failed, 52/200 retries left
E/NetworkSession( 6982): Send datagram failed, 51/200 retries left
E/NetworkSession( 6982): Send datagram failed, 50/200 retries left
E/NetworkSession( 6982): Send datagram failed, 49/200 retries left
E/NetworkSession( 6982): Send datagram failed, 48/200 retries left
E/NetworkSession( 6982): Send datagram failed, 47/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 44/200 retries left
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E/NetworkSession( 6982): Send datagram failed, 40/200 retries left
E/NetworkSession( 6982): Send datagram failed, 39/200 retries left
E/NetworkSession( 6982): Send datagram failed, 38/200 retries left
E/NetworkSession( 6982): Send datagram failed, 37/200 retries left
E/NetworkSession( 6982): Send datagram failed, 36/200 retries left
E/NetworkSession( 6982): Send datagram failed, 35/200 retries left
E/NetworkSession( 6982): Send datagram failed, 34/200 retries left
E/NetworkSession( 6982): Send datagram failed, 33/200 retries left
E/NetworkSession( 6982): Send datagram failed, 32/200 retries left
E/NetworkSession( 6982): Send datagram failed, 31/200 retries left
E/NetworkSession( 6982): Send datagram failed, 30/200 retries left
E/NetworkSession( 6982): Send datagram failed, 29/200 retries left
E/NetworkSession( 6982): Send datagram failed, 28/200 retries left
E/NetworkSession( 6982): Send datagram failed, 27/200 retries left
E/NetworkSession( 6982): Send datagram failed, 26/200 retries left
E/NetworkSession( 6982): Send datagram failed, 25/200 retries left
E/NetworkSession( 6982): Send datagram failed, 24/200 retries left
E/NetworkSession( 6982): Send datagram failed, 23/200 retries left
E/NetworkSession( 6982): Send datagram failed, 22/200 retries left
E/NetworkSession( 6982): Send datagram failed, 21/200 retries left
E/NetworkSession( 6982): Send datagram failed, 20/200 retries left
E/NetworkSession( 6982): Send datagram failed, 19/200 retries left
E/NetworkSession( 6982): Send datagram failed, 18/200 retries left
E/NetworkSession( 6982): Send datagram failed, 17/200 retries left
E/NetworkSession( 6982): Send datagram failed, 16/200 retries left
E/NetworkSession( 6982): Send datagram failed, 15/200 retries left
E/NetworkSession( 6982): Send datagram failed, 14/200 retries left
E/NetworkSession( 6982): Send datagram failed, 13/200 retries left
E/NetworkSession( 6982): Send datagram failed, 12/200 retries left
E/NetworkSession( 6982): Send datagram failed, 11/200 retries left
E/NetworkSession( 6982): Send datagram failed, 10/200 retries left
E/NetworkSession( 6982): Send datagram failed, 9/200 retries left
E/NetworkSession( 6982): Send datagram failed, 8/200 retries left
E/NetworkSession( 6982): Send datagram failed, 7/200 retries left
E/NetworkSession( 6982): Send datagram failed, 6/200 retries left
E/NetworkSession( 6982): Send datagram failed, 5/200 retries left
E/NetworkSession( 6982): Send datagram failed, 4/200 retries left
E/NetworkSession( 6982): Send datagram failed, 3/200 retries left
E/NetworkSession( 6982): Send datagram failed, 2/200 retries left
E/NetworkSession( 6982): Send datagram failed, 1/200 retries left
E/NetworkSession( 6982): Send datagram failed, 0/200 retries left
E/GCastSender( 6982): An error occurred during send in session 1 (-1, 'Send datagram failed.' (Operation not permitted)).
E/NetworkSession( 6982): writeMore on socket 135 failed w/ error -1 (Operation not permitted)
D/WifiService(  792): releaseWifiLockLocked: WifiLock{CastMirroringProvider type=1 binder=android.os.BinderProxy@25435344}
V/RenderScript(12656): Application requested CPU execution
W/AppOps  (  792): Bad call: specified package com.google.android.gms.chromecast_mirroring under uid 10089 but it is really -1
V/RenderScript(12656): 0xa1c09600 Launching thread(s), CPUs 4
W/AppOps  (  792): Bad call: specified package com.google.android.apps.docs.editors.slides under uid 10089 but it is really 10043
D/audio_hw_primary(  183): adev_set_parameters: enter: 0=;disconnect=32768
E/audio_a2dp_hw(  183): adev_set_parameters: ERROR: set param called even when stream out is null
D/r_submix(  183): out_set_parameters(): shutting down MonoPipe sink
I/r_submix(  183): in_standby()
D/r_submix(  183): out_set_parameters(): shutting down MonoPipe sink
D/r_submix(  183): adev_close_output_stream()
D/audio_hw_primary(  183): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=0
I/Converter( 6982): shutting down video encoder
W/GraphicBufferSource(  183): giving up limiting timestamp gap (pts = -1188265760)
W/GraphicBufferSource(  183): Dropped back down to Loaded without Executing
I/OMX-VENC(  183): Component Deinit
I/Converter( 6982): encoder (video/avc) shut down.
I/Converter( 6982): shutting down audio encoder
I/Converter( 6982): encoder (audio/mp4a-latm) shut down.
I/DisplayManagerService(  792): Display device removed: DisplayDeviceInfo{"CCDV": 1280 x 720, 60.0 fps, supportedRefreshRates [], density 213, 213.0 x 213.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, typ
E, FLAG_PRESENTATION}
I/JGCastService( 6982): disable TDLS
V/ActivityManager(  792): Display removed displayId=6
W/ALooperRoster( 6982): failed to deliver message. Target handler not registered.
^C

It looks like you can just ignore it.

Note the process IDs in the log messages. Process ID 12634 is starting for the am command, which runs Dalvik bytecode, so it starts a VM. It does some work, then shuts down. I'm not sure why something is running am, but that's a different question.