[syserror] Update syserror to linuxerr for EACCES, EBADF, and EPERM.

Update all instances of the above errors to the faster linuxerr implementation.
With the temporary linuxerr.Equals(), no logical changes are made.

PiperOrigin-RevId: 382306655

4 files changed, 13 insertions, 11 deletions

diff --git a/pkg/sentry/fsimpl/proc/subtasks.go b/pkg/sentry/fsimpl/proc/subtasks.go
index c53cc0122..d99f90b36 100644
--- a/pkg/sentry/fsimpl/proc/subtasks.go
+++ b/pkg/sentry/fsimpl/proc/subtasks.go
@@ -20,6 +20,7 @@ import (
 
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
+	"gvisor.dev/gvisor/pkg/errors/linuxerr"
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
 	"gvisor.dev/gvisor/pkg/sentry/kernel"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
@@ -180,7 +181,7 @@ func (i *subtasksInode) Stat(ctx context.Context, vsfs *vfs.Filesystem, opts vfs
 
 // SetStat implements kernfs.Inode.SetStat not allowing inode attributes to be changed.
 func (*subtasksInode) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 // DecRef implements kernfs.Inode.DecRef.
diff --git a/pkg/sentry/fsimpl/proc/task.go b/pkg/sentry/fsimpl/proc/task.go
index d05cc1508..4577bfe2e 100644
--- a/pkg/sentry/fsimpl/proc/task.go
+++ b/pkg/sentry/fsimpl/proc/task.go
@@ -20,6 +20,7 @@ import (
 
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
+	"gvisor.dev/gvisor/pkg/errors/linuxerr"
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
 	"gvisor.dev/gvisor/pkg/sentry/kernel"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
@@ -124,7 +125,7 @@ func (i *taskInode) Open(ctx context.Context, rp *vfs.ResolvingPath, d *kernfs.D
 
 // SetStat implements kernfs.Inode.SetStat not allowing inode attributes to be changed.
 func (*taskInode) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 // DecRef implements kernfs.Inode.DecRef.
diff --git a/pkg/sentry/fsimpl/proc/task_files.go b/pkg/sentry/fsimpl/proc/task_files.go
index 9187f5b11..3cd9628c7 100644
--- a/pkg/sentry/fsimpl/proc/task_files.go
+++ b/pkg/sentry/fsimpl/proc/task_files.go
@@ -71,7 +71,7 @@ func getMMIncRef(task *kernel.Task) (*mm.MemoryManager, error) {
 func checkTaskState(t *kernel.Task) error {
 	switch t.ExitState() {
 	case kernel.TaskExitZombie:
-		return syserror.EACCES
+		return linuxerr.EACCES
 	case kernel.TaskExitDead:
 		return syserror.ESRCH
 	}
@@ -409,7 +409,7 @@ func (f *memInode) Open(ctx context.Context, rp *vfs.ResolvingPath, d *kernfs.De
 	// Permission to read this file is governed by PTRACE_MODE_ATTACH_FSCREDS
 	// Since we dont implement setfsuid/setfsgid we can just use PTRACE_MODE_ATTACH
 	if !kernel.ContextCanTrace(ctx, f.task, true) {
-		return nil, syserror.EACCES
+		return nil, linuxerr.EACCES
 	}
 	if err := checkTaskState(f.task); err != nil {
 		return nil, err
@@ -423,7 +423,7 @@ func (f *memInode) Open(ctx context.Context, rp *vfs.ResolvingPath, d *kernfs.De
 
 // SetStat implements kernfs.Inode.SetStat.
 func (*memInode) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 var _ vfs.FileDescriptionImpl = (*memFD)(nil)
@@ -513,7 +513,7 @@ func (fd *memFD) Stat(ctx context.Context, opts vfs.StatOptions) (linux.Statx, e
 
 // SetStat implements vfs.FileDescriptionImpl.SetStat.
 func (fd *memFD) SetStat(context.Context, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 // Release implements vfs.FileDescriptionImpl.Release.
@@ -837,7 +837,7 @@ func (s *exeSymlink) Readlink(ctx context.Context, _ *vfs.Mount) (string, error)
 // Getlink implements kernfs.Inode.Getlink.
 func (s *exeSymlink) Getlink(ctx context.Context, _ *vfs.Mount) (vfs.VirtualDentry, string, error) {
 	if !kernel.ContextCanTrace(ctx, s.task, false) {
-		return vfs.VirtualDentry{}, "", syserror.EACCES
+		return vfs.VirtualDentry{}, "", linuxerr.EACCES
 	}
 	if err := checkTaskState(s.task); err != nil {
 		return vfs.VirtualDentry{}, "", err
@@ -848,7 +848,7 @@ func (s *exeSymlink) Getlink(ctx context.Context, _ *vfs.Mount) (vfs.VirtualDent
 	s.task.WithMuLocked(func(t *kernel.Task) {
 		mm := t.MemoryManager()
 		if mm == nil {
-			err = syserror.EACCES
+			err = linuxerr.EACCES
 			return
 		}
 
@@ -913,7 +913,7 @@ func (s *cwdSymlink) Readlink(ctx context.Context, _ *vfs.Mount) (string, error)
 // Getlink implements kernfs.Inode.Getlink.
 func (s *cwdSymlink) Getlink(ctx context.Context, _ *vfs.Mount) (vfs.VirtualDentry, string, error) {
 	if !kernel.ContextCanTrace(ctx, s.task, false) {
-		return vfs.VirtualDentry{}, "", syserror.EACCES
+		return vfs.VirtualDentry{}, "", linuxerr.EACCES
 	}
 	if err := checkTaskState(s.task); err != nil {
 		return vfs.VirtualDentry{}, "", err
diff --git a/pkg/sentry/fsimpl/proc/tasks_files.go b/pkg/sentry/fsimpl/proc/tasks_files.go
index 2def1ca48..03bed22a3 100644
--- a/pkg/sentry/fsimpl/proc/tasks_files.go
+++ b/pkg/sentry/fsimpl/proc/tasks_files.go
@@ -70,7 +70,7 @@ func (s *selfSymlink) Getlink(ctx context.Context, mnt *vfs.Mount) (vfs.VirtualD
 
 // SetStat implements kernfs.Inode.SetStat not allowing inode attributes to be changed.
 func (*selfSymlink) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 // +stateify savable
@@ -112,7 +112,7 @@ func (s *threadSelfSymlink) Getlink(ctx context.Context, mnt *vfs.Mount) (vfs.Vi
 
 // SetStat implements kernfs.Inode.SetStat not allowing inode attributes to be changed.
 func (*threadSelfSymlink) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, vfs.SetStatOptions) error {
-	return syserror.EPERM
+	return linuxerr.EPERM
 }
 
 // dynamicBytesFileSetAttr implements a special file that allows inode