[syserror] Update syserror to linuxerr for more errors.

Update the following from syserror to the linuxerr equivalent:
EEXIST
EFAULT
ENOTDIR
ENOTTY
EOPNOTSUPP
ERANGE
ESRCH

PiperOrigin-RevId: 384329869

26 files changed, 127 insertions, 137 deletions

diff --git a/pkg/sentry/fsimpl/devpts/master.go b/pkg/sentry/fsimpl/devpts/master.go
index 1374fd3be..9a1a245dc 100644
--- a/pkg/sentry/fsimpl/devpts/master.go
+++ b/pkg/sentry/fsimpl/devpts/master.go
@@ -25,7 +25,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/unimpl"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
@@ -133,7 +132,7 @@ func (mfd *masterFileDescription) Ioctl(ctx context.Context, io usermem.IO, args
 	t := kernel.TaskFromContext(ctx)
 	if t == nil {
 		// ioctl(2) may only be called from a task goroutine.
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 
 	switch cmd := args[1].Uint(); cmd {
@@ -178,7 +177,7 @@ func (mfd *masterFileDescription) Ioctl(ctx context.Context, io usermem.IO, args
 		return mfd.t.setForegroundProcessGroup(ctx, args, true /* isMaster */)
 	default:
 		maybeEmitUnimplementedEvent(ctx, cmd)
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 }
 
diff --git a/pkg/sentry/fsimpl/devpts/replica.go b/pkg/sentry/fsimpl/devpts/replica.go
index 81572b991..e251897b4 100644
--- a/pkg/sentry/fsimpl/devpts/replica.go
+++ b/pkg/sentry/fsimpl/devpts/replica.go
@@ -24,7 +24,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/kernel"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
@@ -142,7 +141,7 @@ func (rfd *replicaFileDescription) Ioctl(ctx context.Context, io usermem.IO, arg
 	t := kernel.TaskFromContext(ctx)
 	if t == nil {
 		// ioctl(2) may only be called from a task goroutine.
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 
 	switch cmd := args[1].Uint(); cmd {
@@ -180,7 +179,7 @@ func (rfd *replicaFileDescription) Ioctl(ctx context.Context, io usermem.IO, arg
 		return rfd.inode.t.setForegroundProcessGroup(ctx, args, false /* isMaster */)
 	default:
 		maybeEmitUnimplementedEvent(ctx, cmd)
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 }
 
diff --git a/pkg/sentry/fsimpl/ext/filesystem.go b/pkg/sentry/fsimpl/ext/filesystem.go
index 599552fb9..bcc7588da 100644
--- a/pkg/sentry/fsimpl/ext/filesystem.go
+++ b/pkg/sentry/fsimpl/ext/filesystem.go
@@ -89,7 +89,7 @@ var _ vfs.FilesystemImpl = (*filesystem)(nil)
 // * inode == vfsd.Impl().(*Dentry).inode.
 func stepLocked(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentry, inode *inode, write bool) (*vfs.Dentry, *inode, error) {
 	if !inode.isDir() {
-		return nil, nil, syserror.ENOTDIR
+		return nil, nil, linuxerr.ENOTDIR
 	}
 	if err := inode.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 		return nil, nil, err
@@ -181,7 +181,7 @@ func walkLocked(ctx context.Context, rp *vfs.ResolvingPath, write bool) (*vfs.De
 		}
 	}
 	if rp.MustBeDir() && !inode.isDir() {
-		return nil, nil, syserror.ENOTDIR
+		return nil, nil, linuxerr.ENOTDIR
 	}
 	return vfsd, inode, nil
 }
@@ -210,7 +210,7 @@ func walkParentLocked(ctx context.Context, rp *vfs.ResolvingPath, write bool) (*
 		}
 	}
 	if !inode.isDir() {
-		return nil, nil, syserror.ENOTDIR
+		return nil, nil, linuxerr.ENOTDIR
 	}
 	return vfsd, inode, nil
 }
@@ -302,7 +302,7 @@ func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 
 	if opts.CheckSearchable {
 		if !inode.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := inode.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
@@ -390,7 +390,7 @@ func (fs *filesystem) Sync(ctx context.Context) error {
 // LinkAt implements vfs.FilesystemImpl.LinkAt.
 func (fs *filesystem) LinkAt(ctx context.Context, rp *vfs.ResolvingPath, vd vfs.VirtualDentry) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 
 	if _, _, err := fs.walk(ctx, rp, true); err != nil {
@@ -403,7 +403,7 @@ func (fs *filesystem) LinkAt(ctx context.Context, rp *vfs.ResolvingPath, vd vfs.
 // MkdirAt implements vfs.FilesystemImpl.MkdirAt.
 func (fs *filesystem) MkdirAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.MkdirOptions) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 
 	if _, _, err := fs.walk(ctx, rp, true); err != nil {
@@ -416,7 +416,7 @@ func (fs *filesystem) MkdirAt(ctx context.Context, rp *vfs.ResolvingPath, opts v
 // MknodAt implements vfs.FilesystemImpl.MknodAt.
 func (fs *filesystem) MknodAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.MknodOptions) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 
 	_, _, err := fs.walk(ctx, rp, true)
@@ -449,7 +449,7 @@ func (fs *filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
 	}
 
 	if !inode.isDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 
 	return linuxerr.EROFS
@@ -468,7 +468,7 @@ func (fs *filesystem) SetStatAt(ctx context.Context, rp *vfs.ResolvingPath, opts
 // SymlinkAt implements vfs.FilesystemImpl.SymlinkAt.
 func (fs *filesystem) SymlinkAt(ctx context.Context, rp *vfs.ResolvingPath, target string) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 
 	_, _, err := fs.walk(ctx, rp, true)
diff --git a/pkg/sentry/fsimpl/ext/regular_file.go b/pkg/sentry/fsimpl/ext/regular_file.go
index 370d7bfdb..6613f0e1d 100644
--- a/pkg/sentry/fsimpl/ext/regular_file.go
+++ b/pkg/sentry/fsimpl/ext/regular_file.go
@@ -24,7 +24,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/memmap"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/sync"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -125,7 +124,7 @@ func (fd *regularFileFD) Write(ctx context.Context, src usermem.IOSequence, opts
 
 // IterDirents implements vfs.FileDescriptionImpl.IterDirents.
 func (fd *regularFileFD) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
-	return syserror.ENOTDIR
+	return linuxerr.ENOTDIR
 }
 
 // Seek implements vfs.FileDescriptionImpl.Seek.
diff --git a/pkg/sentry/fsimpl/ext/symlink.go b/pkg/sentry/fsimpl/ext/symlink.go
index c01017203..385651dc3 100644
--- a/pkg/sentry/fsimpl/ext/symlink.go
+++ b/pkg/sentry/fsimpl/ext/symlink.go
@@ -19,7 +19,6 @@ import (
 	"gvisor.dev/gvisor/pkg/errors/linuxerr"
 	"gvisor.dev/gvisor/pkg/sentry/memmap"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -102,7 +101,7 @@ func (fd *symlinkFD) Write(ctx context.Context, src usermem.IOSequence, opts vfs
 
 // IterDirents implements vfs.FileDescriptionImpl.IterDirents.
 func (fd *symlinkFD) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
-	return syserror.ENOTDIR
+	return linuxerr.ENOTDIR
 }
 
 // Seek implements vfs.FileDescriptionImpl.Seek.
diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go
index e9379e350..172cbd88f 100644
--- a/pkg/sentry/fsimpl/fuse/fusefs.go
+++ b/pkg/sentry/fsimpl/fuse/fusefs.go
@@ -394,7 +394,7 @@ func (i *inode) Open(ctx context.Context, rp *vfs.ResolvingPath, d *kernfs.Dentr
 	isDir := i.InodeAttrs.Mode().IsDir()
 	// return error if specified to open directory but inode is not a directory.
 	if !isDir && opts.Mode.IsDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	if opts.Flags&linux.O_LARGEFILE == 0 && atomic.LoadUint64(&i.size) > linux.MAX_NON_LFS {
 		return nil, linuxerr.EOVERFLOW
diff --git a/pkg/sentry/fsimpl/fuse/regular_file.go b/pkg/sentry/fsimpl/fuse/regular_file.go
index a0802cd32..6c4de3507 100644
--- a/pkg/sentry/fsimpl/fuse/regular_file.go
+++ b/pkg/sentry/fsimpl/fuse/regular_file.go
@@ -47,7 +47,7 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	size := dst.NumBytes()
@@ -151,7 +151,7 @@ func (fd *regularFileFD) pwrite(ctx context.Context, src usermem.IOSequence, off
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, offset, syserror.EOPNOTSUPP
+		return 0, offset, linuxerr.EOPNOTSUPP
 	}
 
 	inode := fd.inode()
diff --git a/pkg/sentry/fsimpl/gofer/filesystem.go b/pkg/sentry/fsimpl/gofer/filesystem.go
index 652e5fe77..14a97b468 100644
--- a/pkg/sentry/fsimpl/gofer/filesystem.go
+++ b/pkg/sentry/fsimpl/gofer/filesystem.go
@@ -189,7 +189,7 @@ func (fs *filesystem) renameMuUnlockAndCheckCaching(ctx context.Context, ds **[]
 // Postconditions: The returned dentry's cached metadata is up to date.
 func (fs *filesystem) stepLocked(ctx context.Context, rp *vfs.ResolvingPath, d *dentry, mayFollowSymlinks bool, ds **[]*dentry) (*dentry, bool, error) {
 	if !d.isDir() {
-		return nil, false, syserror.ENOTDIR
+		return nil, false, linuxerr.ENOTDIR
 	}
 	if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 		return nil, false, err
@@ -305,7 +305,7 @@ func (fs *filesystem) walkParentDirLocked(ctx context.Context, rp *vfs.Resolving
 		}
 	}
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -333,7 +333,7 @@ func (fs *filesystem) resolveLocked(ctx context.Context, rp *vfs.ResolvingPath,
 		}
 	}
 	if rp.MustBeDir() && !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -362,7 +362,7 @@ func (fs *filesystem) doCreateAt(ctx context.Context, rp *vfs.ResolvingPath, dir
 	}
 	name := rp.Component()
 	if name == "." || name == ".." {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if parent.isDeleted() {
 		return syserror.ENOENT
@@ -382,13 +382,13 @@ func (fs *filesystem) doCreateAt(ctx context.Context, rp *vfs.ResolvingPath, dir
 	// checks for writability fail below. Existence check is done by the creation
 	// RPCs themselves.
 	if child, ok := parent.children[name]; ok && child != nil {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	checkExistence := func() error {
 		if child, err := fs.getChildLocked(ctx, parent, name, &ds); err != nil && !linuxerr.Equals(linuxerr.ENOENT, err) {
 			return err
 		} else if child != nil {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		return nil
 	}
@@ -553,7 +553,7 @@ func (fs *filesystem) unlinkAt(ctx context.Context, rp *vfs.ResolvingPath, dir b
 			if child.cachedMetadataAuthoritative() {
 				if !child.isDir() {
 					vfsObj.AbortDeleteDentry(&child.vfsd) // +checklocksforce: see above.
-					return syserror.ENOTDIR
+					return linuxerr.ENOTDIR
 				}
 				for _, grandchild := range child.children {
 					if grandchild != nil {
@@ -574,7 +574,7 @@ func (fs *filesystem) unlinkAt(ctx context.Context, rp *vfs.ResolvingPath, dir b
 			if child != nil {
 				vfsObj.AbortDeleteDentry(&child.vfsd) // +checklocksforce: see above.
 			}
-			return syserror.ENOTDIR
+			return linuxerr.ENOTDIR
 		}
 	}
 	if parent.isSynthetic() {
@@ -645,7 +645,7 @@ func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 	}
 	if opts.CheckSearchable {
 		if !d.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
@@ -767,7 +767,7 @@ func (fs *filesystem) MknodAt(ctx context.Context, rp *vfs.ResolvingPath, opts v
 		switch {
 		case err == nil:
 			// Step succeeded, another file exists.
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		case !linuxerr.Equals(linuxerr.ENOENT, err):
 			// Unexpected error.
 			return err
@@ -807,7 +807,7 @@ func (fs *filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf
 	// support, and it isn't clear that there's any way to implement this in
 	// 9P.
 	if opts.Flags&linux.O_TMPFILE != 0 {
-		return nil, syserror.EOPNOTSUPP
+		return nil, linuxerr.EOPNOTSUPP
 	}
 	mayCreate := opts.Flags&linux.O_CREAT != 0
 	mustCreate := opts.Flags&(linux.O_CREAT|linux.O_EXCL) == (linux.O_CREAT | linux.O_EXCL)
@@ -830,7 +830,7 @@ func (fs *filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf
 			return nil, syserror.EISDIR
 		}
 		if mustCreate {
-			return nil, syserror.EEXIST
+			return nil, linuxerr.EEXIST
 		}
 		if !start.cachedMetadataAuthoritative() {
 			// Refresh dentry's attributes before opening.
@@ -879,7 +879,7 @@ afterTrailingSymlink:
 		return nil, err
 	}
 	if mustCreate {
-		return nil, syserror.EEXIST
+		return nil, linuxerr.EEXIST
 	}
 	// Open existing child or follow symlink.
 	if child.isSymlink() && rp.ShouldFollowSymlink() {
@@ -894,7 +894,7 @@ afterTrailingSymlink:
 		goto afterTrailingSymlink
 	}
 	if rp.MustBeDir() && !child.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	child.IncRef()
 	defer child.DecRef(ctx)
@@ -1218,7 +1218,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	newName := rp.Component()
 	if newName == "." || newName == ".." {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		return linuxerr.EBUSY
 	}
@@ -1272,7 +1272,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 		}
 	} else {
 		if opts.MustBeDir || rp.MustBeDir() {
-			return syserror.ENOTDIR
+			return linuxerr.ENOTDIR
 		}
 	}
 
@@ -1293,7 +1293,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	var replacedVFSD *vfs.Dentry
 	if replaced != nil {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		replacedVFSD = &replaced.vfsd
 		if replaced.isDir() {
@@ -1305,7 +1305,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 			}
 		} else {
 			if rp.MustBeDir() || renamed.isDir() {
-				return syserror.ENOTDIR
+				return linuxerr.ENOTDIR
 			}
 		}
 	}
diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go
index 2f85215d9..bcf989765 100644
--- a/pkg/sentry/fsimpl/gofer/gofer.go
+++ b/pkg/sentry/fsimpl/gofer/gofer.go
@@ -1292,7 +1292,7 @@ func (d *dentry) checkXattrPermissions(creds *auth.Credentials, name string, ats
 	// to the remote filesystem. This is inconsistent with Linux's 9p client,
 	// but consistent with other filesystems (e.g. FUSE).
 	if strings.HasPrefix(name, linux.XATTR_SECURITY_PREFIX) || strings.HasPrefix(name, linux.XATTR_SYSTEM_PREFIX) {
-		return syserror.EOPNOTSUPP
+		return linuxerr.EOPNOTSUPP
 	}
 	mode := linux.FileMode(atomic.LoadUint32(&d.mode))
 	kuid := auth.KUID(atomic.LoadUint32(&d.uid))
diff --git a/pkg/sentry/fsimpl/gofer/regular_file.go b/pkg/sentry/fsimpl/gofer/regular_file.go
index 7f458dd05..91405fe66 100644
--- a/pkg/sentry/fsimpl/gofer/regular_file.go
+++ b/pkg/sentry/fsimpl/gofer/regular_file.go
@@ -35,7 +35,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/usage"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/sync"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -132,7 +131,7 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	// Check for reading at EOF before calling into MM (but not under
@@ -202,7 +201,7 @@ func (fd *regularFileFD) pwrite(ctx context.Context, src usermem.IOSequence, off
 	//
 	// TODO(gvisor.dev/issue/2601): Support select pwritev2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, offset, syserror.EOPNOTSUPP
+		return 0, offset, linuxerr.EOPNOTSUPP
 	}
 
 	d := fd.dentry()
diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go
index 690cde707..29afb67d9 100644
--- a/pkg/sentry/fsimpl/gofer/special_file.go
+++ b/pkg/sentry/fsimpl/gofer/special_file.go
@@ -191,7 +191,7 @@ func (fd *specialFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	if d := fd.dentry(); d.cachedMetadataAuthoritative() {
@@ -271,7 +271,7 @@ func (fd *specialFileFD) pwrite(ctx context.Context, src usermem.IOSequence, off
 	//
 	// TODO(gvisor.dev/issue/2601): Support select pwritev2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, offset, syserror.EOPNOTSUPP
+		return 0, offset, linuxerr.EOPNOTSUPP
 	}
 
 	d := fd.dentry()
diff --git a/pkg/sentry/fsimpl/host/host.go b/pkg/sentry/fsimpl/host/host.go
index cdd33e0fe..9998bd0c3 100644
--- a/pkg/sentry/fsimpl/host/host.go
+++ b/pkg/sentry/fsimpl/host/host.go
@@ -492,7 +492,7 @@ func (i *inode) open(ctx context.Context, d *kernfs.Dentry, mnt *vfs.Mount, flag
 	case unix.S_IFSOCK:
 		if i.isTTY {
 			log.Warningf("cannot use host socket fd %d as TTY", i.hostFD)
-			return nil, syserror.ENOTTY
+			return nil, linuxerr.ENOTTY
 		}
 
 		ep, err := newEndpoint(ctx, i.hostFD, &i.queue)
@@ -585,7 +585,7 @@ func (f *fileDescription) PRead(ctx context.Context, dst usermem.IOSequence, off
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	i := f.inode
@@ -602,7 +602,7 @@ func (f *fileDescription) Read(ctx context.Context, dst usermem.IOSequence, opts
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^linux.RWF_HIPRI != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	i := f.inode
@@ -701,7 +701,7 @@ func (f *fileDescription) writeToHostFD(ctx context.Context, src usermem.IOSeque
 	hostFD := f.inode.hostFD
 	// TODO(gvisor.dev/issue/2601): Support select pwritev2 flags.
 	if flags != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 	writer := hostfd.GetReadWriterAt(int32(hostFD), offset, flags)
 	n, err := src.CopyInTo(ctx, writer)
diff --git a/pkg/sentry/fsimpl/host/tty.go b/pkg/sentry/fsimpl/host/tty.go
index 5974dce64..7f6ce4ee5 100644
--- a/pkg/sentry/fsimpl/host/tty.go
+++ b/pkg/sentry/fsimpl/host/tty.go
@@ -148,7 +148,7 @@ func (t *TTYFileDescription) Write(ctx context.Context, src usermem.IOSequence,
 func (t *TTYFileDescription) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) {
 	task := kernel.TaskFromContext(ctx)
 	if task == nil {
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 
 	// Ignore arg[0]. This is the real FD:
@@ -189,7 +189,7 @@ func (t *TTYFileDescription) Ioctl(ctx context.Context, io usermem.IO, args arch
 
 		pidns := kernel.PIDNamespaceFromContext(ctx)
 		if pidns == nil {
-			return 0, syserror.ENOTTY
+			return 0, linuxerr.ENOTTY
 		}
 
 		t.mu.Lock()
@@ -213,14 +213,14 @@ func (t *TTYFileDescription) Ioctl(ctx context.Context, io usermem.IO, args arch
 			// drivers/tty/tty_io.c:tiocspgrp() converts -EIO from tty_check_change()
 			// to -ENOTTY.
 			if linuxerr.Equals(linuxerr.EIO, err) {
-				return 0, syserror.ENOTTY
+				return 0, linuxerr.ENOTTY
 			}
 			return 0, err
 		}
 
 		// Check that calling task's process group is in the TTY session.
 		if task.ThreadGroup().Session() != t.session {
-			return 0, syserror.ENOTTY
+			return 0, linuxerr.ENOTTY
 		}
 
 		var pgIDP primitive.Int32
@@ -238,7 +238,7 @@ func (t *TTYFileDescription) Ioctl(ctx context.Context, io usermem.IO, args arch
 		pidns := task.PIDNamespace()
 		pg := pidns.ProcessGroupWithID(pgID)
 		if pg == nil {
-			return 0, syserror.ESRCH
+			return 0, linuxerr.ESRCH
 		}
 
 		// Check that new process group is in the TTY session.
@@ -303,7 +303,7 @@ func (t *TTYFileDescription) Ioctl(ctx context.Context, io usermem.IO, args arch
 		unimpl.EmitUnimplementedEvent(ctx)
 		fallthrough
 	default:
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 }
 
diff --git a/pkg/sentry/fsimpl/kernfs/filesystem.go b/pkg/sentry/fsimpl/kernfs/filesystem.go
index 20d2526ad..a97473f7d 100644
--- a/pkg/sentry/fsimpl/kernfs/filesystem.go
+++ b/pkg/sentry/fsimpl/kernfs/filesystem.go
@@ -40,7 +40,7 @@ import (
 // Postcondition: Caller must call fs.processDeferredDecRefs*.
 func (fs *Filesystem) stepExistingLocked(ctx context.Context, rp *vfs.ResolvingPath, d *Dentry, mayFollowSymlinks bool) (*Dentry, error) {
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	// Directory searchable?
 	if err := d.inode.CheckPermissions(ctx, rp.Credentials(), vfs.MayExec); err != nil {
@@ -170,7 +170,7 @@ func (fs *Filesystem) walkExistingLocked(ctx context.Context, rp *vfs.ResolvingP
 		}
 	}
 	if rp.MustBeDir() && !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -197,7 +197,7 @@ func (fs *Filesystem) walkParentDirLocked(ctx context.Context, rp *vfs.Resolving
 		}
 	}
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -215,13 +215,13 @@ func checkCreateLocked(ctx context.Context, creds *auth.Credentials, name string
 		return err
 	}
 	if name == "." || name == ".." {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if len(name) > linux.NAME_MAX {
 		return linuxerr.ENAMETOOLONG
 	}
 	if _, ok := parent.children[name]; ok {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if parent.VFSDentry().IsDead() {
 		return syserror.ENOENT
@@ -318,7 +318,7 @@ func (fs *Filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 
 	if opts.CheckSearchable {
 		if !d.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := d.inode.CheckPermissions(ctx, rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
@@ -345,7 +345,7 @@ func (fs *Filesystem) GetParentDentryAt(ctx context.Context, rp *vfs.ResolvingPa
 // LinkAt implements vfs.FilesystemImpl.LinkAt.
 func (fs *Filesystem) LinkAt(ctx context.Context, rp *vfs.ResolvingPath, vd vfs.VirtualDentry) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	fs.mu.Lock()
 	defer fs.processDeferredDecRefs(ctx)
@@ -390,7 +390,7 @@ func (fs *Filesystem) LinkAt(ctx context.Context, rp *vfs.ResolvingPath, vd vfs.
 // MkdirAt implements vfs.FilesystemImpl.MkdirAt.
 func (fs *Filesystem) MkdirAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.MkdirOptions) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	fs.mu.Lock()
 	defer fs.processDeferredDecRefs(ctx)
@@ -426,7 +426,7 @@ func (fs *Filesystem) MkdirAt(ctx context.Context, rp *vfs.ResolvingPath, opts v
 // MknodAt implements vfs.FilesystemImpl.MknodAt.
 func (fs *Filesystem) MknodAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.MknodOptions) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	fs.mu.Lock()
 	defer fs.processDeferredDecRefs(ctx)
@@ -512,7 +512,7 @@ func (fs *Filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf
 			return nil, syserror.EISDIR
 		}
 		if mustCreate {
-			return nil, syserror.EEXIST
+			return nil, linuxerr.EEXIST
 		}
 		if err := d.inode.CheckPermissions(ctx, rp.Credentials(), ats); err != nil {
 			return nil, err
@@ -577,7 +577,7 @@ afterTrailingSymlink:
 	}
 	// Open existing file or follow symlink.
 	if mustCreate {
-		return nil, syserror.EEXIST
+		return nil, linuxerr.EEXIST
 	}
 	if rp.ShouldFollowSymlink() && child.isSymlink() {
 		targetVD, targetPathname, err := child.inode.Getlink(ctx, rp.Mount())
@@ -681,7 +681,7 @@ func (fs *Filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	newName := rp.Component()
 	if newName == "." || newName == ".." {
 		if noReplace {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		return linuxerr.EBUSY
 	}
@@ -693,7 +693,7 @@ func (fs *Filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	case linuxerr.Equals(linuxerr.EEXIST, err):
 		if noReplace {
 			// Won't overwrite existing node since RENAME_NOREPLACE was requested.
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		dst = dstDir.children[newName]
 		if dst == nil {
@@ -774,7 +774,7 @@ func (fs *Filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
 		return err
 	}
 	if !d.isDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	if d.inode.HasChildren() {
 		return linuxerr.ENOTEMPTY
@@ -844,7 +844,7 @@ func (fs *Filesystem) StatFSAt(ctx context.Context, rp *vfs.ResolvingPath) (linu
 // SymlinkAt implements vfs.FilesystemImpl.SymlinkAt.
 func (fs *Filesystem) SymlinkAt(ctx context.Context, rp *vfs.ResolvingPath, target string) error {
 	if rp.Done() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	fs.mu.Lock()
 	defer fs.processDeferredDecRefs(ctx)
diff --git a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
index df29c8838..a42fc79b4 100644
--- a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
+++ b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go
@@ -511,7 +511,7 @@ func (o *OrderedChildren) insert(name string, child Inode, static bool) error {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	if _, ok := o.set[name]; ok {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	s := &slot{
 		name:   name,
diff --git a/pkg/sentry/fsimpl/overlay/filesystem.go b/pkg/sentry/fsimpl/overlay/filesystem.go
index 77f9affc1..5e89928c5 100644
--- a/pkg/sentry/fsimpl/overlay/filesystem.go
+++ b/pkg/sentry/fsimpl/overlay/filesystem.go
@@ -138,7 +138,7 @@ func (fs *filesystem) renameMuUnlockAndCheckDrop(ctx context.Context, ds **[]*de
 // * !rp.Done().
 func (fs *filesystem) stepLocked(ctx context.Context, rp *vfs.ResolvingPath, d *dentry, mayFollowSymlinks bool, ds **[]*dentry) (*dentry, lookupLayer, error) {
 	if !d.isDir() {
-		return nil, lookupLayerNone, syserror.ENOTDIR
+		return nil, lookupLayerNone, linuxerr.ENOTDIR
 	}
 	if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 		return nil, lookupLayerNone, err
@@ -438,7 +438,7 @@ func (fs *filesystem) walkParentDirLocked(ctx context.Context, rp *vfs.Resolving
 		d = next
 	}
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -458,7 +458,7 @@ func (fs *filesystem) resolveLocked(ctx context.Context, rp *vfs.ResolvingPath,
 		d = next
 	}
 	if rp.MustBeDir() && !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -480,7 +480,7 @@ func (fs *filesystem) doCreateAt(ctx context.Context, rp *vfs.ResolvingPath, dir
 	}
 	name := rp.Component()
 	if name == "." || name == ".." {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if parent.vfsd.IsDead() {
 		return syserror.ENOENT
@@ -495,14 +495,14 @@ func (fs *filesystem) doCreateAt(ctx context.Context, rp *vfs.ResolvingPath, dir
 
 	// Determine if a file already exists at name.
 	if _, ok := parent.children[name]; ok {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	childLayer, err := fs.lookupLayerLocked(ctx, parent, name)
 	if err != nil {
 		return err
 	}
 	if childLayer.existsInOverlay() {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 
 	if !dir && rp.MustBeDir() {
@@ -593,7 +593,7 @@ func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 	}
 	if opts.CheckSearchable {
 		if !d.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
@@ -783,7 +783,7 @@ func (fs *filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf
 			return nil, syserror.EISDIR
 		}
 		if mustCreate {
-			return nil, syserror.EEXIST
+			return nil, linuxerr.EEXIST
 		}
 		if start.isRegularFile() && mayWrite {
 			if err := start.copyUpLocked(ctx); err != nil {
@@ -823,7 +823,7 @@ afterTrailingSymlink:
 	}
 	// Open existing child or follow symlink.
 	if mustCreate {
-		return nil, syserror.EEXIST
+		return nil, linuxerr.EEXIST
 	}
 	if child.isSymlink() && rp.ShouldFollowSymlink() {
 		target, err := child.readlink(ctx)
@@ -837,7 +837,7 @@ afterTrailingSymlink:
 		goto afterTrailingSymlink
 	}
 	if rp.MustBeDir() && !child.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	if child.isRegularFile() && mayWrite {
 		if err := child.copyUpLocked(ctx); err != nil {
@@ -1034,7 +1034,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	newName := rp.Component()
 	if newName == "." || newName == ".." {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		return linuxerr.EBUSY
 	}
@@ -1074,7 +1074,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 		}
 	} else {
 		if opts.MustBeDir || rp.MustBeDir() {
-			return syserror.ENOTDIR
+			return linuxerr.ENOTDIR
 		}
 	}
 
@@ -1100,7 +1100,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	}
 	if replaced != nil {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		replacedVFSD = &replaced.vfsd
 		if replaced.isDir() {
@@ -1118,7 +1118,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 			}
 		} else {
 			if rp.MustBeDir() || renamed.isDir() {
-				return syserror.ENOTDIR
+				return linuxerr.ENOTDIR
 			}
 		}
 	}
@@ -1310,7 +1310,7 @@ func (fs *filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
 		return err
 	}
 	if !child.isDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	if err := parent.mayDelete(rp.Credentials(), child); err != nil {
 		return err
@@ -1536,7 +1536,7 @@ func (fs *filesystem) UnlinkAt(ctx context.Context, rp *vfs.ResolvingPath) error
 		return syserror.EISDIR
 	}
 	if rp.MustBeDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	vfsObj := rp.VirtualFilesystem()
 	mntns := vfs.MountNamespaceFromContext(ctx)
@@ -1659,7 +1659,7 @@ func (fs *filesystem) getXattr(ctx context.Context, d *dentry, creds *auth.Crede
 	// Return EOPNOTSUPP when fetching an overlay attribute.
 	// See fs/overlayfs/super.c:ovl_own_xattr_get().
 	if isOverlayXattr(opts.Name) {
-		return "", syserror.EOPNOTSUPP
+		return "", linuxerr.EOPNOTSUPP
 	}
 
 	// Analogous to fs/overlayfs/super.c:ovl_other_xattr_get().
@@ -1697,7 +1697,7 @@ func (fs *filesystem) setXattrLocked(ctx context.Context, d *dentry, mnt *vfs.Mo
 	// Return EOPNOTSUPP when setting an overlay attribute.
 	// See fs/overlayfs/super.c:ovl_own_xattr_set().
 	if isOverlayXattr(opts.Name) {
-		return syserror.EOPNOTSUPP
+		return linuxerr.EOPNOTSUPP
 	}
 
 	// Analogous to fs/overlayfs/super.c:ovl_other_xattr_set().
@@ -1742,7 +1742,7 @@ func (fs *filesystem) removeXattrLocked(ctx context.Context, d *dentry, mnt *vfs
 	// Linux passes the remove request to xattr_handler->set.
 	// See fs/xattr.c:vfs_removexattr().
 	if isOverlayXattr(name) {
-		return syserror.EOPNOTSUPP
+		return linuxerr.EOPNOTSUPP
 	}
 
 	if err := mnt.CheckBeginWrite(); err != nil {
diff --git a/pkg/sentry/fsimpl/proc/task.go b/pkg/sentry/fsimpl/proc/task.go
index 4577bfe2e..2717e1359 100644
--- a/pkg/sentry/fsimpl/proc/task.go
+++ b/pkg/sentry/fsimpl/proc/task.go
@@ -26,7 +26,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/mm"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 )
 
 // taskInode represents the inode for /proc/PID/ directory.
@@ -50,7 +49,7 @@ var _ kernfs.Inode = (*taskInode)(nil)
 
 func (fs *filesystem) newTaskInode(ctx context.Context, task *kernel.Task, pidns *kernel.PIDNamespace, isThreadGroup bool, fakeCgroupControllers map[string]string) (kernfs.Inode, error) {
 	if task.ExitState() == kernel.TaskExitDead {
-		return nil, syserror.ESRCH
+		return nil, linuxerr.ESRCH
 	}
 
 	contents := map[string]kernfs.Inode{
diff --git a/pkg/sentry/fsimpl/proc/task_files.go b/pkg/sentry/fsimpl/proc/task_files.go
index 3cd9628c7..5526cac1e 100644
--- a/pkg/sentry/fsimpl/proc/task_files.go
+++ b/pkg/sentry/fsimpl/proc/task_files.go
@@ -73,7 +73,7 @@ func checkTaskState(t *kernel.Task) error {
 	case kernel.TaskExitZombie:
 		return linuxerr.EACCES
 	case kernel.TaskExitDead:
-		return syserror.ESRCH
+		return linuxerr.ESRCH
 	}
 	return nil
 }
@@ -110,7 +110,7 @@ var _ dynamicInode = (*auxvData)(nil)
 // Generate implements vfs.DynamicBytesSource.Generate.
 func (d *auxvData) Generate(ctx context.Context, buf *bytes.Buffer) error {
 	if d.task.ExitState() == kernel.TaskExitDead {
-		return syserror.ESRCH
+		return linuxerr.ESRCH
 	}
 	m, err := getMMIncRef(d.task)
 	if err != nil {
@@ -160,7 +160,7 @@ var _ dynamicInode = (*cmdlineData)(nil)
 // Generate implements vfs.DynamicBytesSource.Generate.
 func (d *cmdlineData) Generate(ctx context.Context, buf *bytes.Buffer) error {
 	if d.task.ExitState() == kernel.TaskExitDead {
-		return syserror.ESRCH
+		return linuxerr.ESRCH
 	}
 	m, err := getMMIncRef(d.task)
 	if err != nil {
@@ -228,7 +228,7 @@ func (d *cmdlineData) Generate(ctx context.Context, buf *bytes.Buffer) error {
 		if int(arEnvv.Length()) > remaining {
 			end, ok := arEnvv.Start.AddLength(uint64(remaining))
 			if !ok {
-				return syserror.EFAULT
+				return linuxerr.EFAULT
 			}
 			arEnvv.End = end
 		}
@@ -486,7 +486,7 @@ func (fd *memFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64
 	n, readErr := m.CopyIn(ctx, hostarch.Addr(offset), buf, usermem.IOOpts{IgnorePermissions: true})
 	if n > 0 {
 		if _, err := dst.CopyOut(ctx, buf[:n]); err != nil {
-			return 0, syserror.EFAULT
+			return 0, linuxerr.EFAULT
 		}
 		return int64(n), nil
 	}
@@ -763,7 +763,7 @@ var _ vfs.WritableDynamicBytesSource = (*oomScoreAdj)(nil)
 // Generate implements vfs.DynamicBytesSource.Generate.
 func (o *oomScoreAdj) Generate(ctx context.Context, buf *bytes.Buffer) error {
 	if o.task.ExitState() == kernel.TaskExitDead {
-		return syserror.ESRCH
+		return linuxerr.ESRCH
 	}
 	fmt.Fprintf(buf, "%d\n", o.task.OOMScoreAdj())
 	return nil
@@ -785,7 +785,7 @@ func (o *oomScoreAdj) Write(ctx context.Context, src usermem.IOSequence, offset
 	}
 
 	if o.task.ExitState() == kernel.TaskExitDead {
-		return 0, syserror.ESRCH
+		return 0, linuxerr.ESRCH
 	}
 	if err := o.task.SetOOMScoreAdj(v); err != nil {
 		return 0, err
@@ -825,7 +825,7 @@ func (s *exeSymlink) Readlink(ctx context.Context, _ *vfs.Mount) (string, error)
 	root := vfs.RootFromContext(ctx)
 	if !root.Ok() {
 		// It could have raced with process deletion.
-		return "", syserror.ESRCH
+		return "", linuxerr.ESRCH
 	}
 	defer root.DecRef(ctx)
 
@@ -857,7 +857,7 @@ func (s *exeSymlink) Getlink(ctx context.Context, _ *vfs.Mount) (vfs.VirtualDent
 		// (with locks held).
 		exec = mm.Executable()
 		if exec == nil {
-			err = syserror.ESRCH
+			err = linuxerr.ESRCH
 		}
 	})
 	if err != nil {
@@ -901,7 +901,7 @@ func (s *cwdSymlink) Readlink(ctx context.Context, _ *vfs.Mount) (string, error)
 	root := vfs.RootFromContext(ctx)
 	if !root.Ok() {
 		// It could have raced with process deletion.
-		return "", syserror.ESRCH
+		return "", linuxerr.ESRCH
 	}
 	defer root.DecRef(ctx)
 
@@ -921,7 +921,7 @@ func (s *cwdSymlink) Getlink(ctx context.Context, _ *vfs.Mount) (vfs.VirtualDent
 	cwd := s.task.FSContext().WorkingDirectoryVFS2()
 	if !cwd.Ok() {
 		// It could have raced with process deletion.
-		return vfs.VirtualDentry{}, "", syserror.ESRCH
+		return vfs.VirtualDentry{}, "", linuxerr.ESRCH
 	}
 	return cwd, "", nil
 }
@@ -1124,7 +1124,7 @@ func (d *taskCgroupData) Generate(ctx context.Context, buf *bytes.Buffer) error
 	// exit this file show a task is in no cgroups, which is incorrect. Instead,
 	// once a task has left its cgroups, we return an error.
 	if d.task.ExitState() >= kernel.TaskExitInitiated {
-		return syserror.ESRCH
+		return linuxerr.ESRCH
 	}
 
 	d.task.GenerateProcTaskCgroup(buf)
diff --git a/pkg/sentry/fsimpl/sys/kcov.go b/pkg/sentry/fsimpl/sys/kcov.go
index d06aea162..51f0bf3d8 100644
--- a/pkg/sentry/fsimpl/sys/kcov.go
+++ b/pkg/sentry/fsimpl/sys/kcov.go
@@ -24,7 +24,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/memmap"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -90,7 +89,7 @@ func (fd *kcovFD) Ioctl(ctx context.Context, uio usermem.IO, args arch.SyscallAr
 		}
 		return 0, fd.kcov.DisableTrace(ctx)
 	default:
-		return 0, syserror.ENOTTY
+		return 0, linuxerr.ENOTTY
 	}
 }
 
diff --git a/pkg/sentry/fsimpl/tmpfs/BUILD b/pkg/sentry/fsimpl/tmpfs/BUILD
index 0de43f67f..dc8b9bfeb 100644
--- a/pkg/sentry/fsimpl/tmpfs/BUILD
+++ b/pkg/sentry/fsimpl/tmpfs/BUILD
@@ -103,7 +103,6 @@ go_test(
         "//pkg/sentry/fs/tmpfs",
         "//pkg/sentry/kernel/auth",
         "//pkg/sentry/vfs",
-        "//pkg/syserror",
     ],
 )
 
diff --git a/pkg/sentry/fsimpl/tmpfs/benchmark_test.go b/pkg/sentry/fsimpl/tmpfs/benchmark_test.go
index 4bc7e08d6..2c29343c1 100644
--- a/pkg/sentry/fsimpl/tmpfs/benchmark_test.go
+++ b/pkg/sentry/fsimpl/tmpfs/benchmark_test.go
@@ -31,7 +31,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 )
 
 // Differences from stat_benchmark:
@@ -147,7 +146,7 @@ func BenchmarkVFS1TmpfsStat(b *testing.B) {
 			for i := 0; i < b.N; i++ {
 				err := fileOpOn(ctx, mntns, root, root, linux.AT_FDCWD, filePath, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error {
 					if dirPath && !fs.IsDir(d.Inode.StableAttr) {
-						return syserror.ENOTDIR
+						return linuxerr.ENOTDIR
 					}
 					uattr, err := d.Inode.UnstableAttr(ctx)
 					if err != nil {
@@ -342,7 +341,7 @@ func BenchmarkVFS1TmpfsMountStat(b *testing.B) {
 			for i := 0; i < b.N; i++ {
 				err := fileOpOn(ctx, mntns, root, root, linux.AT_FDCWD, filePath, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error {
 					if dirPath && !fs.IsDir(d.Inode.StableAttr) {
-						return syserror.ENOTDIR
+						return linuxerr.ENOTDIR
 					}
 					uattr, err := d.Inode.UnstableAttr(ctx)
 					if err != nil {
diff --git a/pkg/sentry/fsimpl/tmpfs/filesystem.go b/pkg/sentry/fsimpl/tmpfs/filesystem.go
index 2370fc95e..8b04df038 100644
--- a/pkg/sentry/fsimpl/tmpfs/filesystem.go
+++ b/pkg/sentry/fsimpl/tmpfs/filesystem.go
@@ -46,7 +46,7 @@ func (fs *filesystem) Sync(ctx context.Context) error {
 func stepLocked(ctx context.Context, rp *vfs.ResolvingPath, d *dentry) (*dentry, error) {
 	dir, ok := d.inode.impl.(*directory)
 	if !ok {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	if err := d.inode.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 		return nil, err
@@ -113,7 +113,7 @@ func walkParentDirLocked(ctx context.Context, rp *vfs.ResolvingPath, d *dentry)
 	}
 	dir, ok := d.inode.impl.(*directory)
 	if !ok {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return dir, nil
 }
@@ -133,7 +133,7 @@ func resolveLocked(ctx context.Context, rp *vfs.ResolvingPath) (*dentry, error)
 		d = next
 	}
 	if rp.MustBeDir() && !d.inode.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -162,13 +162,13 @@ func (fs *filesystem) doCreateAt(ctx context.Context, rp *vfs.ResolvingPath, dir
 	}
 	name := rp.Component()
 	if name == "." || name == ".." {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if len(name) > linux.NAME_MAX {
 		return linuxerr.ENAMETOOLONG
 	}
 	if _, ok := parentDir.childMap[name]; ok {
-		return syserror.EEXIST
+		return linuxerr.EEXIST
 	}
 	if !dir && rp.MustBeDir() {
 		return syserror.ENOENT
@@ -221,7 +221,7 @@ func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 	}
 	if opts.CheckSearchable {
 		if !d.inode.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := d.inode.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
@@ -313,7 +313,7 @@ func (fs *filesystem) MknodAt(ctx context.Context, rp *vfs.ResolvingPath, opts v
 func (fs *filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vfs.OpenOptions) (*vfs.FileDescription, error) {
 	if opts.Flags&linux.O_TMPFILE != 0 {
 		// Not yet supported.
-		return nil, syserror.EOPNOTSUPP
+		return nil, linuxerr.EOPNOTSUPP
 	}
 
 	// Handle O_CREAT and !O_CREAT separately, since in the latter case we
@@ -348,7 +348,7 @@ func (fs *filesystem) OpenAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf
 			return nil, syserror.EISDIR
 		}
 		if mustCreate {
-			return nil, syserror.EEXIST
+			return nil, linuxerr.EEXIST
 		}
 		start.IncRef()
 		defer start.DecRef(ctx)
@@ -402,7 +402,7 @@ afterTrailingSymlink:
 		return fd, nil
 	}
 	if mustCreate {
-		return nil, syserror.EEXIST
+		return nil, linuxerr.EEXIST
 	}
 	// Is the file mounted over?
 	if err := rp.CheckMount(ctx, &child.vfsd); err != nil {
@@ -419,7 +419,7 @@ afterTrailingSymlink:
 		goto afterTrailingSymlink
 	}
 	if rp.MustBeDir() && !child.inode.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	child.IncRef()
 	defer child.DecRef(ctx)
@@ -513,7 +513,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	newName := rp.Component()
 	if newName == "." || newName == ".." {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		return linuxerr.EBUSY
 	}
@@ -552,7 +552,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 		}
 	} else {
 		if opts.MustBeDir || rp.MustBeDir() {
-			return syserror.ENOTDIR
+			return linuxerr.ENOTDIR
 		}
 	}
 
@@ -562,7 +562,7 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 	replaced, ok := newParentDir.childMap[newName]
 	if ok {
 		if opts.Flags&linux.RENAME_NOREPLACE != 0 {
-			return syserror.EEXIST
+			return linuxerr.EEXIST
 		}
 		replacedDir, ok := replaced.inode.impl.(*directory)
 		if ok {
@@ -574,10 +574,10 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
 			}
 		} else {
 			if rp.MustBeDir() {
-				return syserror.ENOTDIR
+				return linuxerr.ENOTDIR
 			}
 			if renamed.inode.isDir() {
-				return syserror.ENOTDIR
+				return linuxerr.ENOTDIR
 			}
 		}
 	} else {
@@ -661,7 +661,7 @@ func (fs *filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
 	}
 	childDir, ok := child.inode.impl.(*directory)
 	if !ok {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	if len(childDir.childMap) != 0 {
 		return linuxerr.ENOTEMPTY
@@ -767,7 +767,7 @@ func (fs *filesystem) UnlinkAt(ctx context.Context, rp *vfs.ResolvingPath) error
 		return syserror.EISDIR
 	}
 	if rp.MustBeDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	mnt := rp.Mount()
 	if err := mnt.CheckBeginWrite(); err != nil {
diff --git a/pkg/sentry/fsimpl/tmpfs/regular_file.go b/pkg/sentry/fsimpl/tmpfs/regular_file.go
index ce595ce85..0f2ac6144 100644
--- a/pkg/sentry/fsimpl/tmpfs/regular_file.go
+++ b/pkg/sentry/fsimpl/tmpfs/regular_file.go
@@ -34,7 +34,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/usage"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/sync"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -375,7 +374,7 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^(linux.RWF_HIPRI|linux.RWF_DSYNC|linux.RWF_SYNC) != 0 {
-		return 0, syserror.EOPNOTSUPP
+		return 0, linuxerr.EOPNOTSUPP
 	}
 
 	if dst.NumBytes() == 0 {
@@ -416,7 +415,7 @@ func (fd *regularFileFD) pwrite(ctx context.Context, src usermem.IOSequence, off
 	//
 	// TODO(gvisor.dev/issue/2601): Support select preadv2 flags.
 	if opts.Flags&^(linux.RWF_HIPRI|linux.RWF_DSYNC|linux.RWF_SYNC) != 0 {
-		return 0, offset, syserror.EOPNOTSUPP
+		return 0, offset, linuxerr.EOPNOTSUPP
 	}
 
 	srclen := src.NumBytes()
diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
index 4d6731852..79a54eef3 100644
--- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go
+++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
@@ -731,7 +731,7 @@ func checkXattrName(name string) error {
 	if strings.HasPrefix(name, linux.XATTR_USER_PREFIX) {
 		return nil
 	}
-	return syserror.EOPNOTSUPP
+	return linuxerr.EOPNOTSUPP
 }
 
 func (i *inode) listXattr(creds *auth.Credentials, size uint64) ([]string, error) {
diff --git a/pkg/sentry/fsimpl/verity/filesystem.go b/pkg/sentry/fsimpl/verity/filesystem.go
index 358a66072..070914a68 100644
--- a/pkg/sentry/fsimpl/verity/filesystem.go
+++ b/pkg/sentry/fsimpl/verity/filesystem.go
@@ -116,7 +116,7 @@ func (fs *filesystem) renameMuUnlockAndCheckDrop(ctx context.Context, ds **[]*de
 // * !rp.Done().
 func (fs *filesystem) stepLocked(ctx context.Context, rp *vfs.ResolvingPath, d *dentry, mayFollowSymlinks bool, ds **[]*dentry) (*dentry, error) {
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 
 	if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
@@ -685,7 +685,7 @@ func (fs *filesystem) walkParentDirLocked(ctx context.Context, rp *vfs.Resolving
 		d = next
 	}
 	if !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -705,7 +705,7 @@ func (fs *filesystem) resolveLocked(ctx context.Context, rp *vfs.ResolvingPath,
 		d = next
 	}
 	if rp.MustBeDir() && !d.isDir() {
-		return nil, syserror.ENOTDIR
+		return nil, linuxerr.ENOTDIR
 	}
 	return d, nil
 }
@@ -737,7 +737,7 @@ func (fs *filesystem) GetDentryAt(ctx context.Context, rp *vfs.ResolvingPath, op
 	}
 	if opts.CheckSearchable {
 		if !d.isDir() {
-			return nil, syserror.ENOTDIR
+			return nil, linuxerr.ENOTDIR
 		}
 		if err := d.checkPermissions(rp.Credentials(), vfs.MayExec); err != nil {
 			return nil, err
diff --git a/pkg/sentry/fsimpl/verity/verity.go b/pkg/sentry/fsimpl/verity/verity.go
index 104a28227..c5fa9855b 100644
--- a/pkg/sentry/fsimpl/verity/verity.go
+++ b/pkg/sentry/fsimpl/verity/verity.go
@@ -882,7 +882,7 @@ func (fd *fileDescription) SetStat(ctx context.Context, opts vfs.SetStatOptions)
 // IterDirents implements vfs.FileDescriptionImpl.IterDirents.
 func (fd *fileDescription) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
 	if !fd.d.isDir() {
-		return syserror.ENOTDIR
+		return linuxerr.ENOTDIR
 	}
 	fd.mu.Lock()
 	defer fd.mu.Unlock()