panic: Sentry detected 4 stuck task(s):
	Task tid: 5763 (0x1683), entered RunSys state 3m15.78s ago.
	Task tid: 5757 (0x167d), entered RunSys state 3m17.81s ago.
	Task tid: 5758 (0x167e), entered RunSys state 3m17.55s ago.
	Task tid: 5761 (0x1681), entered RunSys state 3m17.57s ago.
Search for '(*Task).run(0x..., 0x<tid>)' in the stack dump to find the offending goroutine
DIAGNOSIS:
I0317 09:18:08.046374   27130 main.go:305] ***************************
I0317 09:18:08.046433   27130 main.go:306] Args: [/syzkaller/managers/kvm-proxy-overlay-sandbox/current/image -root /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -overlay -network=sandbox debug -stacks --ps ci-gvisor-kvm-proxy-overlay-sandbox-3]
I0317 09:18:08.046495   27130 main.go:307] Version release-20200219.0-175-g829beebf0b67
I0317 09:18:08.046541   27130 main.go:308] PID: 27130
I0317 09:18:08.046567   27130 main.go:309] UID: 0, GID: 0
I0317 09:18:08.046591   27130 main.go:310] Configuration:
I0317 09:18:08.046623   27130 main.go:311] 		RootDir: /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root
I0317 09:18:08.046653   27130 main.go:312] 		Platform: kvm
I0317 09:18:08.046677   27130 main.go:313] 		FileAccess: exclusive, overlay: true
I0317 09:18:08.046724   27130 main.go:314] 		Network: sandbox, logging: false
I0317 09:18:08.046752   27130 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0317 09:18:08.046778   27130 main.go:316] ***************************
D0317 09:18:08.046845   27130 container.go:159] Load container "/syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0317 09:18:08.048471   27130 container.go:592] Signal container "ci-gvisor-kvm-proxy-overlay-sandbox-3": signal 0
D0317 09:18:08.048543   27130 sandbox.go:814] Signal sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0317 09:18:08.048561   27130 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0317 09:18:08.048695   27130 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0317 09:18:10.611234   27130 debug.go:128] Found sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3", PID: 32938
I0317 09:18:10.611300   27130 debug.go:137] Retrieving sandbox stacks
D0317 09:18:10.611324   27130 sandbox.go:932] Stacks sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0317 09:18:10.611338   27130 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
W0317 09:18:10.611398   27130 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 32938: connection refused
retrieving stacks: connecting to control server at PID 32938: connection refused
W0317 09:18:10.611577   27130 main.go:338] Failure to execute command, err: 1