panic: munmap(6e7000, 49000)) failed: function not implemented
DIAGNOSIS:
I1219 09:01:17.964465 59112 x:0] ***************************
I1219 09:01:17.964544 59112 x:0] Args: [/syzkaller/managers/ptrace-direct-overlay-host-race/current/image -root /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=exclusive -overlay -network=host -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-direct-overlay-host-race-1]
I1219 09:01:17.964750 59112 x:0] Version release-20191210.0-52-g628948b1e197
I1219 09:01:17.964794 59112 x:0] PID: 59112
I1219 09:01:17.964847 59112 x:0] UID: 0, GID: 0
I1219 09:01:17.964878 59112 x:0] Configuration:
I1219 09:01:17.964943 59112 x:0] RootDir: /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root
I1219 09:01:17.964988 59112 x:0] Platform: ptrace
I1219 09:01:17.965158 59112 x:0] FileAccess: exclusive, overlay: true
I1219 09:01:17.965721 59112 x:0] Network: host, logging: false
I1219 09:01:17.965768 59112 x:0] Strace: false, max size: 1024, syscalls: []
I1219 09:01:17.965836 59112 x:0] ***************************
W1219 09:01:17.965882 59112 x:0] Block the TERM signal. This is only safe in tests!
D1219 09:01:17.966043 59112 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-race-1"
D1219 09:01:17.978569 59112 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-race-1": signal 0
D1219 09:01:17.978718 59112 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1"
D1219 09:01:17.978802 59112 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1"
D1219 09:01:17.979967 59112 x:0] urpc: successfully marshalled 123 bytes.
I1219 09:01:18.473921 59112 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1", PID: 35021
I1219 09:01:18.474060 59112 x:0] Retrieving sandbox stacks
D1219 09:01:18.474107 59112 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1"
D1219 09:01:18.474217 59112 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1"
D1219 09:01:18.474475 59112 x:0] urpc: successfully marshalled 36 bytes.
W1219 09:01:18.663904 59112 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W1219 09:01:18.664337 59112 x:0] Failure to execute command, err: 1