pkg/report: add gvisor support

google · Jun 22, 2018 · c71647f · c71647f
1 parent 3cf0de8
commit c71647f
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diff --git a/pkg/report/gvisor.go b/pkg/report/gvisor.go
@@ -0,0 +1,176 @@
+// Copyright 2018 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package report
+
+import (
+	"bytes"
+	"regexp"
+
+	"github.com/google/syzkaller/pkg/symbolizer"
+)
+
+type gvisor struct {
+	ignores []*regexp.Regexp
+}
+
+func ctorGvisor(kernelSrc, kernelObj string, symbols map[string][]symbolizer.Symbol,
+	ignores []*regexp.Regexp) (Reporter, error) {
+	ctx := &gvisor{
+		ignores: ignores,
+	}
+	return ctx, nil
+}
+
+func (ctx *gvisor) ContainsCrash(output []byte) bool {
+	return containsCrash(output, gvisorOopses, ctx.ignores)
+}
+
+func (ctx *gvisor) Parse(output []byte) *Report {
+	rep := &Report{
+		Output: output,
+	}
+	var oops *oops
+	for pos := 0; pos < len(output); {
+		next := bytes.IndexByte(output[pos:], '\n')
+		if next != -1 {
+			next += pos
+		} else {
+			next = len(output)
+		}
+		line := output[pos:next]
+		for _, oops1 := range gvisorOopses {
+			match := matchOops(line, oops1, ctx.ignores)
+			if match != -1 {
+				oops = oops1
+				rep.StartPos = pos
+				break
+			}
+		}
+		if oops != nil {
+			break
+		}
+		pos = next + 1
+	}
+	if oops == nil {
+		return nil
+	}
+	title, corrupted, _ := extractDescription(output[rep.StartPos:], oops, nil)
+	rep.Title = title
+	rep.Report = ctx.shortenReport(output[rep.StartPos:])
+	rep.Corrupted = corrupted != ""
+	rep.corruptedReason = corrupted
+	return rep
+}
+
+func (ctx *gvisor) shortenReport(report []byte) []byte {
+	// gvisor panics include stacks of all goroutines.
+	// This output is too lengthy for report and not very useful.
+	// So we always take 5 lines from report and then cut it at the next empty line.
+	// The intention is to capture panic header and traceback of the first goroutine.
+	pos := 0
+	for i := 0; i < 5; i++ {
+		pos1 := bytes.IndexByte(report[pos:], '\n')
+		if pos1 == -1 {
+			return report
+		}
+		pos += pos1 + 1
+	}
+	end := bytes.Index(report[pos:], []byte{'\n', '\n'})
+	if end == -1 {
+		return report
+	}
+	if bytes.Contains(report, []byte("WARNING: DATA RACE")) {
+		// For data races extract both stacks.
+		end2 := bytes.Index(report[pos+end+2:], []byte{'\n', '\n'})
+		if end2 != -1 {
+			end += end2 + 2
+		}
+	}
+	return report[:pos+end+1]
+}
+
+func (ctx *gvisor) Symbolize(rep *Report) error {
+	return nil
+}
+
+var gvisorOopses = []*oops{
+	&oops{
+		[]byte("panic:"),
+		[]oopsFormat{
+			{
+				title:        compile("panic:(.*)"),
+				fmt:          "panic:%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("Panic:"),
+		[]oopsFormat{
+			{
+				title:        compile("Panic:(.*)"),
+				fmt:          "Panic:%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("fatal error:"),
+		[]oopsFormat{
+			{
+				title:        compile("fatal error:(.*)"),
+				fmt:          "fatal error:%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("runtime error:"),
+		[]oopsFormat{
+			{
+				title:        compile("runtime error:(.*)"),
+				fmt:          "runtime error:%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("signal SIGSEGV"),
+		[]oopsFormat{
+			{
+				title:        compile("signal SIGSEGV(.*)"),
+				fmt:          "signal SIGSEGV%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("signal SIGBUS"),
+		[]oopsFormat{
+			{
+				title:        compile("signal SIGBUS(.*)"),
+				fmt:          "signal SIGBUS%[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+	&oops{
+		[]byte("WARNING: DATA RACE"),
+		[]oopsFormat{
+			{
+				title:        compile("WARNING: DATA RACE"),
+				report:       compile("WARNING: DATA RACE\n(?:.*\n)*?  (?:[a-zA-Z0-9./-_]+/)([a-zA-Z0-9.()*_]+)\\(\\)\n"),
+				fmt:          "DATA RACE in %[1]v",
+				noStackTrace: true,
+			},
+		},
+		[]*regexp.Regexp{},
+	},
+}
diff --git a/pkg/report/report.go b/pkg/report/report.go
@@ -52,6 +52,9 @@ type Report struct {
 // ignores: optional list of regexps to ignore (must match first line of crash message)
 func NewReporter(os, vmType, kernelSrc, kernelObj string, symbols map[string][]symbolizer.Symbol,
 	ignores []*regexp.Regexp) (Reporter, error) {
+	if vmType == "gvisor" {
+		os = vmType
+	}
 	ctor := ctors[os]
 	if ctor == nil {
 		return nil, fmt.Errorf("unknown os: %v", os)
@@ -69,6 +72,7 @@ func NewReporter(os, vmType, kernelSrc, kernelObj string, symbols map[string][]s
 var ctors = map[string]fn{
 	"akaros":  ctorStub,
 	"linux":   ctorLinux,
+	"gvisor":  ctorGvisor,
 	"freebsd": ctorFreebsd,
 	"netbsd":  ctorNetbsd,
 	"fuchsia": ctorFuchsia,

diff --git a/pkg/report/testdata/gvisor/report/0 b/pkg/report/testdata/gvisor/report/0
@@ -0,0 +1,123 @@
+TITLE: panic: runtime error: invalid memory address or nil pointer dereference
+
+r9 = getuid()
+ioctl$TUNSETOWNER(r3, 0x400454cc, r9)
+
+panic: runtime error: invalid memory address or nil pointer dereference
+[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x811ac1]
+
+goroutine 9707990 [running]:
+panic(0xaddd00, 0x10d2b90)
+	GOROOT/src/runtime/panic.go:551 +0x3c1 fp=0xc4205d15b0 sp=0xc4205d1510 pc=0x428fa1
+runtime.panicmem()
+	GOROOT/src/runtime/panic.go:63 +0x5e fp=0xc4205d15d0 sp=0xc4205d15b0 pc=0x427e7e
+runtime.sigpanic()
+	GOROOT/src/runtime/signal_unix.go:388 +0x17a fp=0xc4205d1620 sp=0xc4205d15d0 pc=0x43e59a
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*handleReadWriter).WriteFromBlocks(0xc420ef06e0, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/gofer/handles.go:133 +0x41 fp=0xc4205d1698 sp=0xc4205d1620 pc=0x811ac1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*inodeFileState).WriteFromBlocksAt(0xc4204e24d0, 0xc94d20, 0xc4203fdcc8, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x200, 0x0, 0x0, ...)
+	pkg/sentry/fs/gofer/inode.go:204 +0xfe fp=0xc4205d1710 sp=0xc4205d1698 pc=0x81239e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*inodeReadWriter).WriteFromBlocks(0xc421cdcf40, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/fsutil/inode_cached.go:605 +0x35d fp=0xc4205d1848 sp=0xc4205d1710 pc=0x660f8d
+gvisor.googlesource.com/gvisor/pkg/sentry/safemem.(Writer).WriteFromBlocks-fm(0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x20000261, 0x7fe2a3453200, 0xffffffffffffffff)
+	pkg/sentry/mm/io.go:309 +0x57 fp=0xc4205d1898 sp=0xc4205d1848 pc=0x6bacd7
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x20000200, 0x20000261, 0x1, 0xc420ef0b40, 0x10fd8e0, 0x6e5a33137f9f62, 0xc420ef0a88)
+	pkg/sentry/mm/io.go:464 +0x72c fp=0xc4205d1998 sp=0xc4205d1898 pc=0x694c4c
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc400000001, 0xc420ef0b40, 0x1538c53a716d7b9c, ...)
+	pkg/sentry/mm/io.go:533 +0x7f1 fp=0xc4205d1a90 sp=0xc4205d1998 pc=0x6954c1
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyInTo(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc87960, 0xc421cdcf40, 0x0, ...)
+	pkg/sentry/mm/io.go:309 +0x17c fp=0xc4205d1b68 sp=0xc4205d1a90 pc=0x69370c
+gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyInTo(0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, 0xc94d20, 0xc4203fdcc8, 0xc87960, ...)
+	pkg/sentry/usermem/usermem.go:528 +0xad fp=0xc4205d1be0 sp=0xc4205d1b68 pc=0x590a4d
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*CachingInodeOperations).Write(0xc4202ed800, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/fsutil/inode_cached.go:474 +0x19e fp=0xc4205d1ca0 sp=0xc4205d1be0 pc=0x66037e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*fileOperations).Write(0xc421fcd1d0, 0xc94d20, 0xc4203fdcc8, 0xc4205e9000, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/gofer/file.go:192 +0x271 fp=0xc4205d1d78 sp=0xc4205d1ca0 pc=0x80dbf1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Write(0xc421fcd200, 0xc94d20, 0xc4203fdcc8, 0xc4205e9080, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/file_overlay.go:222 +0x9b fp=0xc4205d1e00 sp=0xc4205d1d78 pc=0x61d95b
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Pwritev(0xc4205e9080, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/file.go:269 +0x1c2 fp=0xc4205d1ea8 sp=0xc4205d1e00 pc=0x61b532
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.performCallback(0xc421b91b00, 0xc4205e9080, 0x20000280, 0xc4204a8a80, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/syscalls/linux/sys_aio.go:264 +0x2a4 fp=0xc4205d1f38 sp=0xc4205d1ea8 pc=0x8c2144
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.submitCallback.func1()
+	pkg/sentry/syscalls/linux/sys_aio.go:342 +0x7c fp=0xc4205d1fb0 sp=0xc4205d1f38 pc=0x8ef8bc
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async.func1(0xc420172b60)
+	pkg/sentry/fs/fs.go:82 +0x4f fp=0xc4205d1fd8 sp=0xc4205d1fb0 pc=0x63408f
+runtime.goexit()
+	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4205d1fe0 sp=0xc4205d1fd8 pc=0x455f11
+created by gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async
+	pkg/sentry/fs/fs.go:80 +0x58
+
+goroutine 1 [semacquire, 23 minutes]:
+runtime.gopark(0xbfba68, 0x10ec600, 0xbd8524, 0xa, 0xc4200e0319, 0x4)
+	GOROOT/src/runtime/proc.go:291 +0x11a fp=0xc4204f1920 sp=0xc4204f1900 pc=0x42b10a
+runtime.goparkunlock(0x10ec600, 0xbd8524, 0xa, 0x19, 0x4)
+	GOROOT/src/runtime/proc.go:297 +0x5e fp=0xc4204f1960 sp=0xc4204f1920 pc=0x42b1be
+runtime.semacquire1(0xc42011e700, 0x403300, 0x1)
+	GOROOT/src/runtime/sema.go:144 +0x1d4 fp=0xc4204f19d0 sp=0xc4204f1960 pc=0x43b3e4
+sync.runtime_Semacquire(0xc42011e700)
+	GOROOT/src/runtime/sema.go:56 +0x39 fp=0xc4204f19f8 sp=0xc4204f19d0 pc=0x43b009
+sync.(*WaitGroup).Wait(0xc42011e6f4)
+	GOROOT/src/sync/waitgroup.go:129 +0x72 fp=0xc4204f1a20 sp=0xc4204f19f8 pc=0x46bd72
+gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Kernel).WaitExited(0xc42025eb40)
+	pkg/sentry/kernel/kernel.go:730 +0x35 fp=0xc4204f1a38 sp=0xc4204f1a20 pc=0x70bbb5
+gvisor.googlesource.com/gvisor/runsc/boot.(*Loader).WaitExit(0xc420318000, 0x0, 0x0)
+	runsc/boot/loader.go:354 +0x2e fp=0xc4204f1a60 sp=0xc4204f1a38 pc=0x97e95e
+gvisor.googlesource.com/gvisor/runsc/cmd.(*Boot).Execute(0xc420136740, 0xc8f900, 0xc42010c010, 0xc42011e420, 0xc42011de40, 0x2, 0x2, 0x0)
+	runsc/cmd/boot.go:144 +0xa28 fp=0xc4204f1c00 sp=0xc4204f1a60 pc=0xa05148
+github.com/google/subcommands.(*Commander).Execute(0xc420120000, 0xc8f900, 0xc42010c010, 0xc42011de40, 0x2, 0x2, 0xc42011de40)
+	external/com_github_google_subcommands/subcommands.go:141 +0x29f fp=0xc4204f1ca8 sp=0xc4204f1c00 pc=0x4e263f
+github.com/google/subcommands.Execute(0xc8f900, 0xc42010c010, 0xc42011de40, 0x2, 0x2, 0x5)
+	external/com_github_google_subcommands/subcommands.go:371 +0x5f fp=0xc4204f1cf0 sp=0xc4204f1ca8 pc=0x4e406f
+main.main()
+	runsc/main.go:188 +0xfda fp=0xc4204f1f88 sp=0xc4204f1cf0 pc=0xa0ff7a
+runtime.main()
+	GOROOT/src/runtime/proc.go:198 +0x212 fp=0xc4204f1fe0 sp=0xc4204f1f88 pc=0x42acb2
+runtime.goexit()
+	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4204f1fe8 sp=0xc4204f1fe0 pc=0x455f11
+
+REPORT:
+panic: runtime error: invalid memory address or nil pointer dereference
+[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x811ac1]
+
+goroutine 9707990 [running]:
+panic(0xaddd00, 0x10d2b90)
+	GOROOT/src/runtime/panic.go:551 +0x3c1 fp=0xc4205d15b0 sp=0xc4205d1510 pc=0x428fa1
+runtime.panicmem()
+	GOROOT/src/runtime/panic.go:63 +0x5e fp=0xc4205d15d0 sp=0xc4205d15b0 pc=0x427e7e
+runtime.sigpanic()
+	GOROOT/src/runtime/signal_unix.go:388 +0x17a fp=0xc4205d1620 sp=0xc4205d15d0 pc=0x43e59a
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*handleReadWriter).WriteFromBlocks(0xc420ef06e0, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/gofer/handles.go:133 +0x41 fp=0xc4205d1698 sp=0xc4205d1620 pc=0x811ac1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*inodeFileState).WriteFromBlocksAt(0xc4204e24d0, 0xc94d20, 0xc4203fdcc8, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x200, 0x0, 0x0, ...)
+	pkg/sentry/fs/gofer/inode.go:204 +0xfe fp=0xc4205d1710 sp=0xc4205d1698 pc=0x81239e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*inodeReadWriter).WriteFromBlocks(0xc421cdcf40, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/fsutil/inode_cached.go:605 +0x35d fp=0xc4205d1848 sp=0xc4205d1710 pc=0x660f8d
+gvisor.googlesource.com/gvisor/pkg/sentry/safemem.(Writer).WriteFromBlocks-fm(0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x20000261, 0x7fe2a3453200, 0xffffffffffffffff)
+	pkg/sentry/mm/io.go:309 +0x57 fp=0xc4205d1898 sp=0xc4205d1848 pc=0x6bacd7
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x20000200, 0x20000261, 0x1, 0xc420ef0b40, 0x10fd8e0, 0x6e5a33137f9f62, 0xc420ef0a88)
+	pkg/sentry/mm/io.go:464 +0x72c fp=0xc4205d1998 sp=0xc4205d1898 pc=0x694c4c
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc400000001, 0xc420ef0b40, 0x1538c53a716d7b9c, ...)
+	pkg/sentry/mm/io.go:533 +0x7f1 fp=0xc4205d1a90 sp=0xc4205d1998 pc=0x6954c1
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyInTo(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc87960, 0xc421cdcf40, 0x0, ...)
+	pkg/sentry/mm/io.go:309 +0x17c fp=0xc4205d1b68 sp=0xc4205d1a90 pc=0x69370c
+gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyInTo(0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, 0xc94d20, 0xc4203fdcc8, 0xc87960, ...)
+	pkg/sentry/usermem/usermem.go:528 +0xad fp=0xc4205d1be0 sp=0xc4205d1b68 pc=0x590a4d
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*CachingInodeOperations).Write(0xc4202ed800, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/fsutil/inode_cached.go:474 +0x19e fp=0xc4205d1ca0 sp=0xc4205d1be0 pc=0x66037e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*fileOperations).Write(0xc421fcd1d0, 0xc94d20, 0xc4203fdcc8, 0xc4205e9000, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/gofer/file.go:192 +0x271 fp=0xc4205d1d78 sp=0xc4205d1ca0 pc=0x80dbf1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Write(0xc421fcd200, 0xc94d20, 0xc4203fdcc8, 0xc4205e9080, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/file_overlay.go:222 +0x9b fp=0xc4205d1e00 sp=0xc4205d1d78 pc=0x61d95b
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Pwritev(0xc4205e9080, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/file.go:269 +0x1c2 fp=0xc4205d1ea8 sp=0xc4205d1e00 pc=0x61b532
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.performCallback(0xc421b91b00, 0xc4205e9080, 0x20000280, 0xc4204a8a80, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/syscalls/linux/sys_aio.go:264 +0x2a4 fp=0xc4205d1f38 sp=0xc4205d1ea8 pc=0x8c2144
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.submitCallback.func1()
+	pkg/sentry/syscalls/linux/sys_aio.go:342 +0x7c fp=0xc4205d1fb0 sp=0xc4205d1f38 pc=0x8ef8bc
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async.func1(0xc420172b60)
+	pkg/sentry/fs/fs.go:82 +0x4f fp=0xc4205d1fd8 sp=0xc4205d1fb0 pc=0x63408f
+runtime.goexit()
+	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4205d1fe0 sp=0xc4205d1fd8 pc=0x455f11
+created by gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async
+	pkg/sentry/fs/fs.go:80 +0x58