[Nexus 6P Android Development] rajlulla:
Random crashes

Hey everyone, I'm running DP4 and EX Kernel and am experiencing random reboots. I've never taken a logcat before so I'm not sure if this is the right information but here it is:

--------- beginning of crash
04-12 19:35:44.870 441 441 F libc : Fatal signal 11 (SIGSEGV), code 1, fault addr 0xc0 in tid 441 (surfaceflinger)
04-12 19:35:44.915 572 572 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
04-12 19:35:44.915 572 572 F DEBUG : Build fingerprint: 'google/angler/angler:8.0.0/OPP4.170623.014/4187591:user/release-keys'
04-12 19:35:44.915 572 572 F DEBUG : Revision: '0'
04-12 19:35:44.915 572 572 F DEBUG : ABI: 'arm64'
04-12 19:35:44.915 572 572 F DEBUG : pid: 441, tid: 441, name: surfaceflinger >>> /system/bin/surfaceflinger <<<
04-12 19:35:44.915 572 572 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xc0
04-12 19:35:44.915 572 572 F DEBUG : Cause: null pointer dereference
04-12 19:35:44.915 572 572 F DEBUG : x0 0000000000000000 x1 0000000000000000 x2 0000007ff5543a08 x3 0000007ff55439d8
04-12 19:35:44.915 572 572 F DEBUG : x4 0000007ff5543c08 x5 0000000000000004 x6 0000000000000000 x7 7f7f7f7f7f7f7f7f
04-12 19:35:44.915 572 572 F DEBUG : x8 0000000000000080 x9 0000000000000000 x10 0000000000000000 x11 0000000000000000
04-12 19:35:44.915 572 572 F DEBUG : x12 000000741ece3890 x13 0000000000000000 x14 0000000000000000 x15 ffffffffffffffff
04-12 19:35:44.916 572 572 F DEBUG : x16 000000741c177278 x17 000000741bce54b8 x18 000000741c1531a8 x19 0000000000000000
04-12 19:35:44.916 572 572 F DEBUG : x20 000000741ec9aa00 x21 000000741ec9b254 x22 000000741ec4c718 x23 0000000000000001
04-12 19:35:44.916 572 572 F DEBUG : x24 000000741c847260 x25 bb71b0723eaf05fd x26 000000741c847260 x27 000000741c847278
04-12 19:35:44.916 572 572 F DEBUG : x28 000000741cca1fa4 x29 0000007ff5543970 x30 000000741c152638
04-12 19:35:44.916 572 572 F DEBUG : sp 0000007ff5543970 pc 000000741c1525f8 pstate 0000000080000000
04-12 19:35:44.944 572 572 F DEBUG :
04-12 19:35:44.944 572 572 F DEBUG : backtrace:
04-12 19:35:44.944 572 572 F DEBUG : #00 pc 00000000000115f8 /vendor/lib64/hw/hwcomposer.msm8994.so (_Z21hwc_getDisplayConfigsP21hwc_composer_device_1iPjPm+188)
04-12 19:35:44.944 572 572 F DEBUG : #01 pc 000000000001297c /vendor/lib64/libhwc2on1adapter.so (_ZN7android14HWC2On1Adapter7Display15populateConfigsEv+124)
04-12 19:35:44.944 572 572 F DEBUG : #02 pc 000000000000b478 /vendor/lib64/libhwc2on1adapter.so (_ZN7android14HWC2On1Adapter15populatePrimaryEv+144)
04-12 19:35:44.944 572 572 F DEBUG : #03 pc 000000000000af38 /vendor/lib64/libhwc2on1adapter.so (_ZN7android14HWC2On1AdapterC1EP21hwc_composer_device_1+244)
04-12 19:35:44.944 572 572 F DEBUG : #04 pc 000000000000fe0c /vendor/lib64/hw/android.hardware.graphics.composer@2.1-impl.so (_ZN7android8hardware8graphics8composer4V2_114implementation6HwcHalC1EPK11hw_module_t+264)
04-12 19:35:44.944 572 572 F DEBUG : #05 pc 0000000000012008 /vendor/lib64/hw/android.hardware.graphics.composer@2.1-impl.so (HIDL_FETCH_IComposer+100)
04-12 19:35:44.944 572 572 F DEBUG : #06 pc 0000000000024830 /system/lib64/libhidltransport.so (_ZN7android8hardware25PassthroughServiceManager3getERKNS0_11hidl_stringES4_+1884)
04-12 19:35:44.945 572 572 F DEBUG : #07 pc 0000000000025490 /system/lib64/android.hardware.graphics.composer@2.1.so (_ZN7android8hardware8graphics8composer4V2_19IComposer10getServiceERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEEb+1456)
04-12 19:35:44.945 572 572 F DEBUG : #08 pc 000000000008a15c /system/lib64/libsurfaceflinger.so (_ZN7android4Hwc28ComposerC1Eb+348)
04-12 19:35:44.945 572 572 F DEBUG : #09 pc 0000000000091894 /system/lib64/libsurfaceflinger.so (_ZN4HWC26DeviceC1Eb+40)
04-12 19:35:44.945 572 572 F DEBUG : #10 pc 00000000000b9d70 /system/lib64/libsurfaceflinger.so (_ZN7android10HWComposerC1Eb+500)
04-12 19:35:44.945 572 572 F DEBUG : #11 pc 00000000000a3f74 /system/lib64/libsurfaceflinger.so (_ZN7android14SurfaceFlinger4initEv+944)
04-12 19:35:44.945 572 572 F DEBUG : #12 pc 0000000000002b24 /system/bin/surfaceflinger (main+596)
04-12 19:35:44.945 572 572 F DEBUG : #13 pc 000000000001b668 /system/lib64/libc.so (__libc_init+88)
04-12 19:35:44.945 572 572 F DEBUG : #14 pc 0000000000002830 /system/bin/surfaceflinger (do_arm64_start+80)

Thanks in advance!

Update: My phone restart 5 times in 2 hours with the same report, and each time I had hotspot shield VPN and uTorrent running in the background. After the 5th time, I stopped running both and went 2 hours without a restart. I don't understand the logs so I'm not sure what exactly caused it, but I'll try a different VPN tomorrow to see if it was the hotspot shield's fault.