4 files changed, 28 insertions, 7 deletions
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index f5d5b84e4..65d02c697 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -138,7 +138,7 @@ func (s *Statx) MarshalUnsafe(dst []byte) {
 
 // UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
 func (s *Statx) UnmarshalUnsafe(src []byte) {
-    if s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() {
+    if s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
         safecopy.CopyOut(unsafe.Pointer(s), src)
     } else {
         s.UnmarshalBytes(src)
@@ -178,7 +178,7 @@ func (s *Statx) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
 // CopyIn implements marshal.Marshallable.CopyIn.
 //go:nosplit
 func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
-    if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
+    if !s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
         // Type Statx doesn't have a packed layout in memory, fall back to UnmarshalBytes.
         buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
         length, err := task.CopyInBytes(addr, buf) // escapes: okay.
@@ -204,7 +204,7 @@ func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
 
 // WriteTo implements io.WriterTo.WriteTo.
 func (s *Statx) WriteTo(w io.Writer) (int64, error) {
-    if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
+    if !s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() {
         // Type Statx doesn't have a packed layout in memory, fall back to MarshalBytes.
         buf := make([]byte, s.SizeBytes())
         s.MarshalBytes(buf)
diff --git a/pkg/sentry/fsimpl/gofer/regular_file.go b/pkg/sentry/fsimpl/gofer/regular_file.go
index f7a15a2ed..404a452c4 100644
--- a/pkg/sentry/fsimpl/gofer/regular_file.go
+++ b/pkg/sentry/fsimpl/gofer/regular_file.go
@@ -72,7 +72,9 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	if offset < 0 {
 		return 0, syserror.EINVAL
 	}
-	if opts.Flags != 0 {
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
 		return 0, syserror.EOPNOTSUPP
 	}
 
@@ -123,9 +125,12 @@ func (fd *regularFileFD) PWrite(ctx context.Context, src usermem.IOSequence, off
 	if offset < 0 {
 		return 0, syserror.EINVAL
 	}
-	if opts.Flags != 0 {
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
 		return 0, syserror.EOPNOTSUPP
 	}
+
 	limit, err := vfs.CheckLimit(ctx, offset, src.NumBytes())
 	if err != nil {
 		return 0, err
diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go
index a92008208..a016cbae1 100644
--- a/pkg/sentry/fsimpl/gofer/special_file.go
+++ b/pkg/sentry/fsimpl/gofer/special_file.go
@@ -129,7 +129,9 @@ func (fd *specialFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	if fd.seekable && offset < 0 {
 		return 0, syserror.EINVAL
 	}
-	if opts.Flags != 0 {
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
 		return 0, syserror.EOPNOTSUPP
 	}
 
@@ -173,7 +175,9 @@ func (fd *specialFileFD) PWrite(ctx context.Context, src usermem.IOSequence, off
 	if fd.seekable && offset < 0 {
 		return 0, syserror.EINVAL
 	}
-	if opts.Flags != 0 {
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
 		return 0, syserror.EOPNOTSUPP
 	}
 
diff --git a/pkg/sentry/fsimpl/tmpfs/regular_file.go b/pkg/sentry/fsimpl/tmpfs/regular_file.go
index bfd9c5995..b805aadd0 100644
--- a/pkg/sentry/fsimpl/tmpfs/regular_file.go
+++ b/pkg/sentry/fsimpl/tmpfs/regular_file.go
@@ -279,6 +279,12 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs
 	if offset < 0 {
 		return 0, syserror.EINVAL
 	}
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
+		return 0, syserror.EOPNOTSUPP
+	}
+
 	if dst.NumBytes() == 0 {
 		return 0, nil
 	}
@@ -304,6 +310,12 @@ func (fd *regularFileFD) PWrite(ctx context.Context, src usermem.IOSequence, off
 	if offset < 0 {
 		return 0, syserror.EINVAL
 	}
+
+	// Check that flags are supported. Silently ignore RWF_HIPRI.
+	if opts.Flags&^linux.RWF_HIPRI != 0 {
+		return 0, syserror.EOPNOTSUPP
+	}
+
 	srclen := src.NumBytes()
 	if srclen == 0 {
 		return 0, nil