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-rw-r--r--pkg/sentry/kernel/fs_context.go98
-rw-r--r--pkg/sentry/kernel/kernel.go145
-rwxr-xr-xpkg/sentry/kernel/kernel_state_autogen.go8
-rw-r--r--pkg/sentry/kernel/task.go27
-rw-r--r--pkg/sentry/kernel/task_clone.go11
-rw-r--r--pkg/sentry/kernel/task_context.go2
-rw-r--r--pkg/sentry/kernel/task_exit.go7
-rw-r--r--pkg/sentry/kernel/task_log.go15
-rw-r--r--pkg/sentry/kernel/task_start.go49
-rw-r--r--pkg/sentry/kernel/thread_group.go6
10 files changed, 287 insertions, 81 deletions
diff --git a/pkg/sentry/kernel/fs_context.go b/pkg/sentry/kernel/fs_context.go
index 2448c1d99..7218aa24e 100644
--- a/pkg/sentry/kernel/fs_context.go
+++ b/pkg/sentry/kernel/fs_context.go
@@ -19,6 +19,7 @@ import (
"gvisor.dev/gvisor/pkg/refs"
"gvisor.dev/gvisor/pkg/sentry/fs"
+ "gvisor.dev/gvisor/pkg/sentry/vfs"
"gvisor.dev/gvisor/pkg/sync"
)
@@ -37,10 +38,16 @@ type FSContext struct {
// destroyed.
root *fs.Dirent
+ // rootVFS2 is the filesystem root.
+ rootVFS2 vfs.VirtualDentry
+
// cwd is the current working directory. Will be nil iff the FSContext
// has been destroyed.
cwd *fs.Dirent
+ // cwdVFS2 is the current working directory.
+ cwdVFS2 vfs.VirtualDentry
+
// umask is the current file mode creation mask. When a thread using this
// context invokes a syscall that creates a file, bits set in umask are
// removed from the permissions that the file is created with.
@@ -60,6 +67,19 @@ func newFSContext(root, cwd *fs.Dirent, umask uint) *FSContext {
return &f
}
+// NewFSContextVFS2 returns a new filesystem context.
+func NewFSContextVFS2(root, cwd vfs.VirtualDentry, umask uint) *FSContext {
+ root.IncRef()
+ cwd.IncRef()
+ f := FSContext{
+ rootVFS2: root,
+ cwdVFS2: cwd,
+ umask: umask,
+ }
+ f.EnableLeakCheck("kernel.FSContext")
+ return &f
+}
+
// destroy is the destructor for an FSContext.
//
// This will call DecRef on both root and cwd Dirents. If either call to
@@ -75,11 +95,17 @@ func (f *FSContext) destroy() {
f.mu.Lock()
defer f.mu.Unlock()
- f.root.DecRef()
- f.root = nil
-
- f.cwd.DecRef()
- f.cwd = nil
+ if VFS2Enabled {
+ f.rootVFS2.DecRef()
+ f.rootVFS2 = vfs.VirtualDentry{}
+ f.cwdVFS2.DecRef()
+ f.cwdVFS2 = vfs.VirtualDentry{}
+ } else {
+ f.root.DecRef()
+ f.root = nil
+ f.cwd.DecRef()
+ f.cwd = nil
+ }
}
// DecRef implements RefCounter.DecRef with destructor f.destroy.
@@ -93,12 +119,21 @@ func (f *FSContext) DecRef() {
func (f *FSContext) Fork() *FSContext {
f.mu.Lock()
defer f.mu.Unlock()
- f.cwd.IncRef()
- f.root.IncRef()
+
+ if VFS2Enabled {
+ f.cwdVFS2.IncRef()
+ f.rootVFS2.IncRef()
+ } else {
+ f.cwd.IncRef()
+ f.root.IncRef()
+ }
+
return &FSContext{
- cwd: f.cwd,
- root: f.root,
- umask: f.umask,
+ cwd: f.cwd,
+ root: f.root,
+ cwdVFS2: f.cwdVFS2,
+ rootVFS2: f.rootVFS2,
+ umask: f.umask,
}
}
@@ -109,12 +144,23 @@ func (f *FSContext) Fork() *FSContext {
func (f *FSContext) WorkingDirectory() *fs.Dirent {
f.mu.Lock()
defer f.mu.Unlock()
- if f.cwd != nil {
- f.cwd.IncRef()
- }
+
+ f.cwd.IncRef()
return f.cwd
}
+// WorkingDirectoryVFS2 returns the current working directory.
+//
+// This will return nil if called after destroy(), otherwise it will return a
+// Dirent with a reference taken.
+func (f *FSContext) WorkingDirectoryVFS2() vfs.VirtualDentry {
+ f.mu.Lock()
+ defer f.mu.Unlock()
+
+ f.cwdVFS2.IncRef()
+ return f.cwdVFS2
+}
+
// SetWorkingDirectory sets the current working directory.
// This will take an extra reference on the Dirent.
//
@@ -137,6 +183,20 @@ func (f *FSContext) SetWorkingDirectory(d *fs.Dirent) {
old.DecRef()
}
+// SetWorkingDirectoryVFS2 sets the current working directory.
+// This will take an extra reference on the VirtualDentry.
+//
+// This is not a valid call after destroy.
+func (f *FSContext) SetWorkingDirectoryVFS2(d vfs.VirtualDentry) {
+ f.mu.Lock()
+ defer f.mu.Unlock()
+
+ old := f.cwdVFS2
+ f.cwdVFS2 = d
+ d.IncRef()
+ old.DecRef()
+}
+
// RootDirectory returns the current filesystem root.
//
// This will return nil if called after destroy(), otherwise it will return a
@@ -150,6 +210,18 @@ func (f *FSContext) RootDirectory() *fs.Dirent {
return f.root
}
+// RootDirectoryVFS2 returns the current filesystem root.
+//
+// This will return nil if called after destroy(), otherwise it will return a
+// Dirent with a reference taken.
+func (f *FSContext) RootDirectoryVFS2() vfs.VirtualDentry {
+ f.mu.Lock()
+ defer f.mu.Unlock()
+
+ f.rootVFS2.IncRef()
+ return f.rootVFS2
+}
+
// SetRootDirectory sets the root directory.
// This will take an extra reference on the Dirent.
//
diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go
index 3ee760ba2..2665f057c 100644
--- a/pkg/sentry/kernel/kernel.go
+++ b/pkg/sentry/kernel/kernel.go
@@ -43,11 +43,13 @@ import (
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/cpuid"
"gvisor.dev/gvisor/pkg/eventchannel"
+ "gvisor.dev/gvisor/pkg/fspath"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/refs"
"gvisor.dev/gvisor/pkg/sentry/arch"
"gvisor.dev/gvisor/pkg/sentry/fs"
"gvisor.dev/gvisor/pkg/sentry/fs/timerfd"
+ "gvisor.dev/gvisor/pkg/sentry/fsbridge"
"gvisor.dev/gvisor/pkg/sentry/hostcpu"
"gvisor.dev/gvisor/pkg/sentry/inet"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
@@ -71,6 +73,10 @@ import (
"gvisor.dev/gvisor/pkg/tcpip"
)
+// VFS2Enabled is set to true when VFS2 is enabled. Added as a global for allow
+// easy access everywhere. To be removed once VFS2 becomes the default.
+var VFS2Enabled = false
+
// Kernel represents an emulated Linux kernel. It must be initialized by calling
// Init() or LoadFrom().
//
@@ -238,6 +244,9 @@ type Kernel struct {
// SpecialOpts contains special kernel options.
SpecialOpts
+
+ // VFS keeps the filesystem state used across the kernel.
+ VFS *vfs.VirtualFilesystem
}
// InitKernelArgs holds arguments to Init.
@@ -624,7 +633,7 @@ type CreateProcessArgs struct {
// File is a passed host FD pointing to a file to load as the init binary.
//
// This is checked if and only if Filename is "".
- File *fs.File
+ File fsbridge.File
// Argvv is a list of arguments.
Argv []string
@@ -673,6 +682,13 @@ type CreateProcessArgs struct {
// increment it).
MountNamespace *fs.MountNamespace
+ // MountNamespaceVFS2 optionally contains the mount namespace for this
+ // process. If nil, the init process's mount namespace is used.
+ //
+ // Anyone setting MountNamespaceVFS2 must donate a reference (i.e.
+ // increment it).
+ MountNamespaceVFS2 *vfs.MountNamespace
+
// ContainerID is the container that the process belongs to.
ContainerID string
}
@@ -711,11 +727,22 @@ func (ctx *createProcessContext) Value(key interface{}) interface{} {
return ctx.args.Credentials
case fs.CtxRoot:
if ctx.args.MountNamespace != nil {
- // MountNamespace.Root() will take a reference on the root
- // dirent for us.
+ // MountNamespace.Root() will take a reference on the root dirent for us.
return ctx.args.MountNamespace.Root()
}
return nil
+ case vfs.CtxRoot:
+ if ctx.args.MountNamespaceVFS2 == nil {
+ return nil
+ }
+ // MountNamespaceVFS2.Root() takes a reference on the root dirent for us.
+ return ctx.args.MountNamespaceVFS2.Root()
+ case vfs.CtxMountNamespace:
+ if ctx.k.globalInit == nil {
+ return nil
+ }
+ // MountNamespaceVFS2 takes a reference for us.
+ return ctx.k.GlobalInit().Leader().MountNamespaceVFS2()
case fs.CtxDirentCacheLimiter:
return ctx.k.DirentCacheLimiter
case ktime.CtxRealtimeClock:
@@ -757,34 +784,77 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID,
defer k.extMu.Unlock()
log.Infof("EXEC: %v", args.Argv)
- // Grab the mount namespace.
- mounts := args.MountNamespace
- if mounts == nil {
- mounts = k.GlobalInit().Leader().MountNamespace()
- mounts.IncRef()
- }
-
- tg := k.NewThreadGroup(mounts, args.PIDNamespace, NewSignalHandlers(), linux.SIGCHLD, args.Limits)
ctx := args.NewContext(k)
- // Get the root directory from the MountNamespace.
- root := mounts.Root()
- // The call to newFSContext below will take a reference on root, so we
- // don't need to hold this one.
- defer root.DecRef()
-
- // Grab the working directory.
- remainingTraversals := uint(args.MaxSymlinkTraversals)
- wd := root // Default.
- if args.WorkingDirectory != "" {
- var err error
- wd, err = mounts.FindInode(ctx, root, nil, args.WorkingDirectory, &remainingTraversals)
- if err != nil {
- return nil, 0, fmt.Errorf("failed to find initial working directory %q: %v", args.WorkingDirectory, err)
+ var (
+ opener fsbridge.Lookup
+ fsContext *FSContext
+ mntns *fs.MountNamespace
+ )
+
+ if VFS2Enabled {
+ mntnsVFS2 := args.MountNamespaceVFS2
+ if mntnsVFS2 == nil {
+ // MountNamespaceVFS2 adds a reference to the namespace, which is
+ // transferred to the new process.
+ mntnsVFS2 = k.GlobalInit().Leader().MountNamespaceVFS2()
+ }
+ // Get the root directory from the MountNamespace.
+ root := args.MountNamespaceVFS2.Root()
+ // The call to newFSContext below will take a reference on root, so we
+ // don't need to hold this one.
+ defer root.DecRef()
+
+ // Grab the working directory.
+ wd := root // Default.
+ if args.WorkingDirectory != "" {
+ pop := vfs.PathOperation{
+ Root: root,
+ Start: wd,
+ Path: fspath.Parse(args.WorkingDirectory),
+ FollowFinalSymlink: true,
+ }
+ var err error
+ wd, err = k.VFS.GetDentryAt(ctx, args.Credentials, &pop, &vfs.GetDentryOptions{
+ CheckSearchable: true,
+ })
+ if err != nil {
+ return nil, 0, fmt.Errorf("failed to find initial working directory %q: %v", args.WorkingDirectory, err)
+ }
+ defer wd.DecRef()
+ }
+ opener = fsbridge.NewVFSLookup(mntnsVFS2, root, wd)
+ fsContext = NewFSContextVFS2(root, wd, args.Umask)
+
+ } else {
+ mntns = args.MountNamespace
+ if mntns == nil {
+ mntns = k.GlobalInit().Leader().MountNamespace()
+ mntns.IncRef()
}
- defer wd.DecRef()
+ // Get the root directory from the MountNamespace.
+ root := mntns.Root()
+ // The call to newFSContext below will take a reference on root, so we
+ // don't need to hold this one.
+ defer root.DecRef()
+
+ // Grab the working directory.
+ remainingTraversals := args.MaxSymlinkTraversals
+ wd := root // Default.
+ if args.WorkingDirectory != "" {
+ var err error
+ wd, err = mntns.FindInode(ctx, root, nil, args.WorkingDirectory, &remainingTraversals)
+ if err != nil {
+ return nil, 0, fmt.Errorf("failed to find initial working directory %q: %v", args.WorkingDirectory, err)
+ }
+ defer wd.DecRef()
+ }
+ opener = fsbridge.NewFSLookup(mntns, root, wd)
+ fsContext = newFSContext(root, wd, args.Umask)
}
+ tg := k.NewThreadGroup(mntns, args.PIDNamespace, NewSignalHandlers(), linux.SIGCHLD, args.Limits)
+
// Check which file to start from.
switch {
case args.Filename != "":
@@ -805,11 +875,9 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID,
}
// Create a fresh task context.
- remainingTraversals = uint(args.MaxSymlinkTraversals)
+ remainingTraversals := args.MaxSymlinkTraversals
loadArgs := loader.LoadArgs{
- Mounts: mounts,
- Root: root,
- WorkingDirectory: wd,
+ Opener: opener,
RemainingTraversals: &remainingTraversals,
ResolveFinal: true,
Filename: args.Filename,
@@ -834,13 +902,14 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID,
Kernel: k,
ThreadGroup: tg,
TaskContext: tc,
- FSContext: newFSContext(root, wd, args.Umask),
+ FSContext: fsContext,
FDTable: args.FDTable,
Credentials: args.Credentials,
AllowedCPUMask: sched.NewFullCPUSet(k.applicationCores),
UTSNamespace: args.UTSNamespace,
IPCNamespace: args.IPCNamespace,
AbstractSocketNamespace: args.AbstractSocketNamespace,
+ MountNamespaceVFS2: args.MountNamespaceVFS2,
ContainerID: args.ContainerID,
}
t, err := k.tasks.NewTask(config)
@@ -1378,6 +1447,20 @@ func (ctx supervisorContext) Value(key interface{}) interface{} {
return ctx.k.globalInit.mounts.Root()
}
return nil
+ case vfs.CtxRoot:
+ if ctx.k.globalInit == nil {
+ return vfs.VirtualDentry{}
+ }
+ mntns := ctx.k.GlobalInit().Leader().MountNamespaceVFS2()
+ defer mntns.DecRef()
+ // Root() takes a reference on the root dirent for us.
+ return mntns.Root()
+ case vfs.CtxMountNamespace:
+ if ctx.k.globalInit == nil {
+ return nil
+ }
+ // MountNamespaceVFS2() takes a reference for us.
+ return ctx.k.GlobalInit().Leader().MountNamespaceVFS2()
case fs.CtxDirentCacheLimiter:
return ctx.k.DirentCacheLimiter
case ktime.CtxRealtimeClock:
diff --git a/pkg/sentry/kernel/kernel_state_autogen.go b/pkg/sentry/kernel/kernel_state_autogen.go
index a98912420..edbaf9db8 100755
--- a/pkg/sentry/kernel/kernel_state_autogen.go
+++ b/pkg/sentry/kernel/kernel_state_autogen.go
@@ -90,7 +90,9 @@ func (x *FSContext) save(m state.Map) {
x.beforeSave()
m.Save("AtomicRefCount", &x.AtomicRefCount)
m.Save("root", &x.root)
+ m.Save("rootVFS2", &x.rootVFS2)
m.Save("cwd", &x.cwd)
+ m.Save("cwdVFS2", &x.cwdVFS2)
m.Save("umask", &x.umask)
}
@@ -98,7 +100,9 @@ func (x *FSContext) afterLoad() {}
func (x *FSContext) load(m state.Map) {
m.Load("AtomicRefCount", &x.AtomicRefCount)
m.Load("root", &x.root)
+ m.Load("rootVFS2", &x.rootVFS2)
m.Load("cwd", &x.cwd)
+ m.Load("cwdVFS2", &x.cwdVFS2)
m.Load("umask", &x.umask)
}
@@ -152,6 +156,7 @@ func (x *Kernel) save(m state.Map) {
m.Save("nextSocketEntry", &x.nextSocketEntry)
m.Save("DirentCacheLimiter", &x.DirentCacheLimiter)
m.Save("SpecialOpts", &x.SpecialOpts)
+ m.Save("VFS", &x.VFS)
}
func (x *Kernel) afterLoad() {}
@@ -184,6 +189,7 @@ func (x *Kernel) load(m state.Map) {
m.Load("nextSocketEntry", &x.nextSocketEntry)
m.Load("DirentCacheLimiter", &x.DirentCacheLimiter)
m.Load("SpecialOpts", &x.SpecialOpts)
+ m.Load("VFS", &x.VFS)
m.LoadValue("danglingEndpoints", new([]tcpip.Endpoint), func(y interface{}) { x.loadDanglingEndpoints(y.([]tcpip.Endpoint)) })
m.LoadValue("deviceRegistry", new(*device.Registry), func(y interface{}) { x.loadDeviceRegistry(y.(*device.Registry)) })
}
@@ -573,6 +579,7 @@ func (x *Task) save(m state.Map) {
m.Save("utsns", &x.utsns)
m.Save("ipcns", &x.ipcns)
m.Save("abstractSockets", &x.abstractSockets)
+ m.Save("mountNamespaceVFS2", &x.mountNamespaceVFS2)
m.Save("parentDeathSignal", &x.parentDeathSignal)
m.Save("cleartid", &x.cleartid)
m.Save("allowedCPUMask", &x.allowedCPUMask)
@@ -631,6 +638,7 @@ func (x *Task) load(m state.Map) {
m.Load("utsns", &x.utsns)
m.Load("ipcns", &x.ipcns)
m.Load("abstractSockets", &x.abstractSockets)
+ m.Load("mountNamespaceVFS2", &x.mountNamespaceVFS2)
m.Load("parentDeathSignal", &x.parentDeathSignal)
m.Load("cleartid", &x.cleartid)
m.Load("allowedCPUMask", &x.allowedCPUMask)
diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go
index 981e8c7fe..a3443ff21 100644
--- a/pkg/sentry/kernel/task.go
+++ b/pkg/sentry/kernel/task.go
@@ -424,6 +424,11 @@ type Task struct {
// abstractSockets is protected by mu.
abstractSockets *AbstractSocketNamespace
+ // mountNamespaceVFS2 is the task's mount namespace.
+ //
+ // It is protected by mu. It is owned by the task goroutine.
+ mountNamespaceVFS2 *vfs.MountNamespace
+
// parentDeathSignal is sent to this task's thread group when its parent exits.
//
// parentDeathSignal is protected by mu.
@@ -638,6 +643,11 @@ func (t *Task) Value(key interface{}) interface{} {
return int32(t.ThreadGroup().ID())
case fs.CtxRoot:
return t.fsContext.RootDirectory()
+ case vfs.CtxRoot:
+ return t.fsContext.RootDirectoryVFS2()
+ case vfs.CtxMountNamespace:
+ t.mountNamespaceVFS2.IncRef()
+ return t.mountNamespaceVFS2
case fs.CtxDirentCacheLimiter:
return t.k.DirentCacheLimiter
case inet.CtxStack:
@@ -701,6 +711,14 @@ func (t *Task) SyscallRestartBlock() SyscallRestartBlock {
// Preconditions: The caller must be running on the task goroutine, or t.mu
// must be locked.
func (t *Task) IsChrooted() bool {
+ if VFS2Enabled {
+ realRoot := t.mountNamespaceVFS2.Root()
+ defer realRoot.DecRef()
+ root := t.fsContext.RootDirectoryVFS2()
+ defer root.DecRef()
+ return root != realRoot
+ }
+
realRoot := t.tg.mounts.Root()
defer realRoot.DecRef()
root := t.fsContext.RootDirectory()
@@ -796,6 +814,15 @@ func (t *Task) MountNamespace() *fs.MountNamespace {
return t.tg.mounts
}
+// MountNamespaceVFS2 returns t's MountNamespace. A reference is taken on the
+// returned mount namespace.
+func (t *Task) MountNamespaceVFS2() *vfs.MountNamespace {
+ t.mu.Lock()
+ defer t.mu.Unlock()
+ t.mountNamespaceVFS2.IncRef()
+ return t.mountNamespaceVFS2
+}
+
// AbstractSockets returns t's AbstractSocketNamespace.
func (t *Task) AbstractSockets() *AbstractSocketNamespace {
return t.abstractSockets
diff --git a/pkg/sentry/kernel/task_clone.go b/pkg/sentry/kernel/task_clone.go
index 53d4d211b..ba74b4c1c 100644
--- a/pkg/sentry/kernel/task_clone.go
+++ b/pkg/sentry/kernel/task_clone.go
@@ -199,6 +199,12 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) {
ipcns = NewIPCNamespace(userns)
}
+ // TODO(b/63601033): Implement CLONE_NEWNS.
+ mntnsVFS2 := t.mountNamespaceVFS2
+ if mntnsVFS2 != nil {
+ mntnsVFS2.IncRef()
+ }
+
tc, err := t.tc.Fork(t, t.k, !opts.NewAddressSpace)
if err != nil {
return 0, nil, err
@@ -241,7 +247,9 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) {
rseqAddr := usermem.Addr(0)
rseqSignature := uint32(0)
if opts.NewThreadGroup {
- tg.mounts.IncRef()
+ if tg.mounts != nil {
+ tg.mounts.IncRef()
+ }
sh := t.tg.signalHandlers
if opts.NewSignalHandlers {
sh = sh.Fork()
@@ -265,6 +273,7 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) {
UTSNamespace: utsns,
IPCNamespace: ipcns,
AbstractSocketNamespace: t.abstractSockets,
+ MountNamespaceVFS2: mntnsVFS2,
RSeqAddr: rseqAddr,
RSeqSignature: rseqSignature,
ContainerID: t.ContainerID(),
diff --git a/pkg/sentry/kernel/task_context.go b/pkg/sentry/kernel/task_context.go
index 2d6e7733c..2be982684 100644
--- a/pkg/sentry/kernel/task_context.go
+++ b/pkg/sentry/kernel/task_context.go
@@ -136,7 +136,7 @@ func (t *Task) Stack() *arch.Stack {
func (k *Kernel) LoadTaskImage(ctx context.Context, args loader.LoadArgs) (*TaskContext, *syserr.Error) {
// If File is not nil, we should load that instead of resolving Filename.
if args.File != nil {
- args.Filename = args.File.MappedName(ctx)
+ args.Filename = args.File.PathnameWithDeleted(ctx)
}
// Prepare a new user address space to load into.
diff --git a/pkg/sentry/kernel/task_exit.go b/pkg/sentry/kernel/task_exit.go
index 435761e5a..c4ade6e8e 100644
--- a/pkg/sentry/kernel/task_exit.go
+++ b/pkg/sentry/kernel/task_exit.go
@@ -269,6 +269,13 @@ func (*runExitMain) execute(t *Task) taskRunState {
t.fsContext.DecRef()
t.fdTable.DecRef()
+ t.mu.Lock()
+ if t.mountNamespaceVFS2 != nil {
+ t.mountNamespaceVFS2.DecRef()
+ t.mountNamespaceVFS2 = nil
+ }
+ t.mu.Unlock()
+
// If this is the last task to exit from the thread group, release the
// thread group's resources.
if lastExiter {
diff --git a/pkg/sentry/kernel/task_log.go b/pkg/sentry/kernel/task_log.go
index 41259210c..6d737d3e5 100644
--- a/pkg/sentry/kernel/task_log.go
+++ b/pkg/sentry/kernel/task_log.go
@@ -198,18 +198,11 @@ func (t *Task) traceExecEvent(tc *TaskContext) {
if !trace.IsEnabled() {
return
}
- d := tc.MemoryManager.Executable()
- if d == nil {
+ file := tc.MemoryManager.Executable()
+ if file == nil {
trace.Logf(t.traceContext, traceCategory, "exec: << unknown >>")
return
}
- defer d.DecRef()
- root := t.fsContext.RootDirectory()
- if root == nil {
- trace.Logf(t.traceContext, traceCategory, "exec: << no root directory >>")
- return
- }
- defer root.DecRef()
- n, _ := d.FullName(root)
- trace.Logf(t.traceContext, traceCategory, "exec: %s", n)
+ defer file.DecRef()
+ trace.Logf(t.traceContext, traceCategory, "exec: %s", file.PathnameWithDeleted(t))
}
diff --git a/pkg/sentry/kernel/task_start.go b/pkg/sentry/kernel/task_start.go
index de838beef..f9236a842 100644
--- a/pkg/sentry/kernel/task_start.go
+++ b/pkg/sentry/kernel/task_start.go
@@ -21,6 +21,7 @@ import (
"gvisor.dev/gvisor/pkg/sentry/kernel/futex"
"gvisor.dev/gvisor/pkg/sentry/kernel/sched"
"gvisor.dev/gvisor/pkg/sentry/usage"
+ "gvisor.dev/gvisor/pkg/sentry/vfs"
"gvisor.dev/gvisor/pkg/syserror"
"gvisor.dev/gvisor/pkg/usermem"
)
@@ -80,6 +81,9 @@ type TaskConfig struct {
// AbstractSocketNamespace is the AbstractSocketNamespace of the new task.
AbstractSocketNamespace *AbstractSocketNamespace
+ // MountNamespaceVFS2 is the MountNamespace of the new task.
+ MountNamespaceVFS2 *vfs.MountNamespace
+
// RSeqAddr is a pointer to the the userspace linux.RSeq structure.
RSeqAddr usermem.Addr
@@ -116,28 +120,29 @@ func (ts *TaskSet) newTask(cfg *TaskConfig) (*Task, error) {
parent: cfg.Parent,
children: make(map[*Task]struct{}),
},
- runState: (*runApp)(nil),
- interruptChan: make(chan struct{}, 1),
- signalMask: cfg.SignalMask,
- signalStack: arch.SignalStack{Flags: arch.SignalStackFlagDisable},
- tc: *tc,
- fsContext: cfg.FSContext,
- fdTable: cfg.FDTable,
- p: cfg.Kernel.Platform.NewContext(),
- k: cfg.Kernel,
- ptraceTracees: make(map[*Task]struct{}),
- allowedCPUMask: cfg.AllowedCPUMask.Copy(),
- ioUsage: &usage.IO{},
- niceness: cfg.Niceness,
- netns: cfg.NetworkNamespaced,
- utsns: cfg.UTSNamespace,
- ipcns: cfg.IPCNamespace,
- abstractSockets: cfg.AbstractSocketNamespace,
- rseqCPU: -1,
- rseqAddr: cfg.RSeqAddr,
- rseqSignature: cfg.RSeqSignature,
- futexWaiter: futex.NewWaiter(),
- containerID: cfg.ContainerID,
+ runState: (*runApp)(nil),
+ interruptChan: make(chan struct{}, 1),
+ signalMask: cfg.SignalMask,
+ signalStack: arch.SignalStack{Flags: arch.SignalStackFlagDisable},
+ tc: *tc,
+ fsContext: cfg.FSContext,
+ fdTable: cfg.FDTable,
+ p: cfg.Kernel.Platform.NewContext(),
+ k: cfg.Kernel,
+ ptraceTracees: make(map[*Task]struct{}),
+ allowedCPUMask: cfg.AllowedCPUMask.Copy(),
+ ioUsage: &usage.IO{},
+ niceness: cfg.Niceness,
+ netns: cfg.NetworkNamespaced,
+ utsns: cfg.UTSNamespace,
+ ipcns: cfg.IPCNamespace,
+ abstractSockets: cfg.AbstractSocketNamespace,
+ mountNamespaceVFS2: cfg.MountNamespaceVFS2,
+ rseqCPU: -1,
+ rseqAddr: cfg.RSeqAddr,
+ rseqSignature: cfg.RSeqSignature,
+ futexWaiter: futex.NewWaiter(),
+ containerID: cfg.ContainerID,
}
t.creds.Store(cfg.Credentials)
t.endStopCond.L = &t.tg.signalHandlers.mu
diff --git a/pkg/sentry/kernel/thread_group.go b/pkg/sentry/kernel/thread_group.go
index 768e958d2..268f62e9d 100644
--- a/pkg/sentry/kernel/thread_group.go
+++ b/pkg/sentry/kernel/thread_group.go
@@ -256,7 +256,7 @@ type ThreadGroup struct {
tty *TTY
}
-// NewThreadGroup returns a new, empty thread group in PID namespace ns. The
+// NewThreadGroup returns a new, empty thread group in PID namespace pidns. The
// thread group leader will send its parent terminationSignal when it exits.
// The new thread group isn't visible to the system until a task has been
// created inside of it by a successful call to TaskSet.NewTask.
@@ -317,7 +317,9 @@ func (tg *ThreadGroup) release() {
for _, it := range its {
it.DestroyTimer()
}
- tg.mounts.DecRef()
+ if tg.mounts != nil {
+ tg.mounts.DecRef()
+ }
}
// forEachChildThreadGroupLocked indicates over all child ThreadGroups.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 06:41:43 +0000