[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. 2021/11/01 10:09:19 fuzzer started 2021/11/01 10:09:20 connecting to host at 10.128.0.169:36761 2021/11/01 10:09:20 checking machine... 2021/11/01 10:09:20 checking revisions... fatal error: sigaction failed runtime stack: runtime.throw(0x8011ce, 0x10) /usr/lib/go-1.15/src/runtime/panic.go:1116 +0x72 runtime.sysSigaction.func1() /usr/lib/go-1.15/src/runtime/os_linux.go:471 +0x36 runtime.systemstack(0x0) /usr/lib/go-1.15/src/runtime/asm_amd64.s:370 +0x66 runtime.mstart() /usr/lib/go-1.15/src/runtime/proc.go:1116 goroutine 1 [running]: runtime.systemstack_switch() /usr/lib/go-1.15/src/runtime/asm_amd64.s:330 fp=0xc000073088 sp=0xc000073080 pc=0x46a740 runtime.sysSigaction(0x7fcd00000001, 0xc000073138, 0x0) /usr/lib/go-1.15/src/runtime/os_linux.go:470 +0x6c fp=0xc0000730c0 sp=0xc000073088 pc=0x43346c runtime.sigaction(0x100000000000001, 0xc000073138, 0x0) /usr/lib/go-1.15/src/runtime/cgo_sigaction.go:32 +0x45 fp=0xc000073120 sp=0xc0000730c0 pc=0x404865 runtime.setsig(0x1, 0x0) /usr/lib/go-1.15/src/runtime/os_linux.go:420 +0x98 fp=0xc000073168 sp=0xc000073120 pc=0x433338 runtime.clearSignalHandlers() /usr/lib/go-1.15/src/runtime/signal_unix.go:259 +0x3f fp=0xc000073190 sp=0xc000073168 pc=0x44b3df syscall.runtime_AfterForkInChild() /usr/lib/go-1.15/src/runtime/proc.go:3483 +0x1a fp=0xc0000731c8 sp=0xc000073190 pc=0x4677da syscall.forkAndExecInChild1(0xc000014980, 0xc00000d5c0, 0x3, 0x3, 0xc000050de0, 0xc, 0xc, 0x0, 0x0, 0xc0000735e8, ...) /usr/lib/go-1.15/src/syscall/exec_linux.go:236 +0x318 fp=0xc000073370 sp=0xc0000731c8 pc=0x4a8898 syscall.forkAndExecInChild(0xc000014980, 0xc00000d5c0, 0x3, 0x3, 0xc000050de0, 0xc, 0xc, 0x0, 0x0, 0xc0000735e8, ...) /usr/lib/go-1.15/src/syscall/exec_linux.go:83 +0xcf fp=0xc000073448 sp=0xc000073370 pc=0x4a83af syscall.forkExec(0x7ffe97b3ce5d, 0xe, 0xc00000d4a0, 0x2, 0x2, 0xc0000735e8, 0xb, 0x3876624600000100, 0xc000308340) /usr/lib/go-1.15/src/syscall/exec_unix.go:211 +0x398 fp=0xc000073558 sp=0xc000073448 pc=0x4aafd8 syscall.StartProcess(...) /usr/lib/go-1.15/src/syscall/exec_unix.go:263 os.startProcess(0x7ffe97b3ce5d, 0xe, 0xc00000d4a0, 0x2, 0x2, 0xc000073780, 0xc000010160, 0xb, 0xb) /usr/lib/go-1.15/src/os/exec_posix.go:53 +0x29b fp=0xc000073640 sp=0xc000073558 pc=0x4cad3b os.StartProcess(0x7ffe97b3ce5d, 0xe, 0xc00000d4a0, 0x2, 0x2, 0xc000073780, 0xb, 0x7fcd48b23528, 0x7f) /usr/lib/go-1.15/src/os/exec.go:102 +0x7c fp=0xc000073698 sp=0xc000073640 pc=0x4ca99c os/exec.(*Cmd).Start(0xc000147760, 0xc0000537d0, 0xc00002e800) /usr/lib/go-1.15/src/os/exec/exec.go:422 +0x528 fp=0xc0000737d8 sp=0xc000073698 pc=0x4fd528 github.com/google/syzkaller/pkg/osutil.Run(0xdf8475800, 0xc000147760, 0xc0000537a0, 0x0, 0x0, 0xc000147760, 0x1) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/osutil/osutil.go:43 +0xa5 fp=0xc0000738f8 sp=0xc0000737d8 pc=0x5048a5 main.checkRevisions(0xc000073f00, 0x945ba8, 0xc00008a360) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/testing.go:218 +0x1a6 fp=0xc0000739a8 sp=0xc0000738f8 pc=0x73f2e6 main.checkMachine(0xc000073f00, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/testing.go:124 +0xf6 fp=0xc000073ae0 sp=0xc0000739a8 pc=0x73e036 main.testImage(0x7ffe97b3ce8c, 0x12, 0xc000073f00) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/testing.go:41 +0x165 fp=0xc000073b68 sp=0xc000073ae0 pc=0x73d6e5 main.main() /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:178 +0x1c14 fp=0xc000073f88 sp=0xc000073b68 pc=0x7378d4 runtime.main() /usr/lib/go-1.15/src/runtime/proc.go:204 +0x209 fp=0xc000073fe0 sp=0xc000073f88 pc=0x438d09 runtime.goexit() /usr/lib/go-1.15/src/runtime/asm_amd64.s:1374 +0x1 fp=0xc000073fe8 sp=0xc000073fe0 pc=0x46c381 goroutine 5 [chan receive]: github.com/google/syzkaller/pkg/osutil.HandleInterrupts.func1(0xc00008a0c0) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/osutil/osutil_unix.go:79 +0xb6 created by github.com/google/syzkaller/pkg/osutil.HandleInterrupts /syzkaller/gopath/src/github.com/google/syzkaller/pkg/osutil/osutil_unix.go:76 +0x3f goroutine 6 [chan receive]: main.main.func1(0xc00008a0c0) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:164 +0x34 created by main.main /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:162 +0x573 goroutine 10 [runnable]: main.checkMachineHeartbeats(0xc00008a360) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/testing.go:104 created by main.checkMachine /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/testing.go:123 +0xe5 goroutine 9 [syscall]: os/signal.signal_recv(0x0) /usr/lib/go-1.15/src/runtime/sigqueue.go:147 +0x9d os/signal.loop() /usr/lib/go-1.15/src/os/signal/signal_unix.go:23 +0x25 created by os/signal.Notify.func1.1 /usr/lib/go-1.15/src/os/signal/signal.go:150 +0x45