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-rw-r--r--pkg/abi/linux/linux_abi_autogen_unsafe.go26
-rw-r--r--pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go2
-rw-r--r--pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go6
-rw-r--r--pkg/sentry/platform/ring0/defs_impl_arm64.go3
-rw-r--r--pkg/tcpip/transport/udp/endpoint.go37
-rw-r--r--pkg/tcpip/transport/udp/protocol.go7
6 files changed, 45 insertions, 36 deletions
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index 4aef01929..f0925f4e4 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -154,7 +154,7 @@ func (s *Statx) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (s *Statx) Packed() bool {
- return s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed()
+ return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -180,7 +180,7 @@ func (s *Statx) UnmarshalUnsafe(src []byte) {
// CopyOutN implements marshal.Marshallable.CopyOutN.
//go:nosplit
func (s *Statx) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
- if !s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() {
+ if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
// Type Statx doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
s.MarshalBytes(buf) // escapes: fallback.
@@ -629,7 +629,7 @@ func (f *FUSEHeaderIn) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (f *FUSEHeaderIn) Packed() bool {
- return f.Opcode.Packed() && f.Unique.Packed()
+ return f.Unique.Packed() && f.Opcode.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -655,7 +655,7 @@ func (f *FUSEHeaderIn) UnmarshalUnsafe(src []byte) {
// CopyOutN implements marshal.Marshallable.CopyOutN.
//go:nosplit
func (f *FUSEHeaderIn) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
- if !f.Opcode.Packed() && f.Unique.Packed() {
+ if !f.Unique.Packed() && f.Opcode.Packed() {
// Type FUSEHeaderIn doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := task.CopyScratchBuffer(f.SizeBytes()) // escapes: okay.
f.MarshalBytes(buf) // escapes: fallback.
@@ -2210,7 +2210,7 @@ func (i *IPTIP) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (i *IPTIP) Packed() bool {
- return i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed()
+ return i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -2225,7 +2225,7 @@ func (i *IPTIP) MarshalUnsafe(dst []byte) {
// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (i *IPTIP) UnmarshalUnsafe(src []byte) {
- if i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
+ if i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() {
safecopy.CopyOut(unsafe.Pointer(i), src)
} else {
// Type IPTIP doesn't have a packed layout in memory, fallback to UnmarshalBytes.
@@ -2236,7 +2236,7 @@ func (i *IPTIP) UnmarshalUnsafe(src []byte) {
// CopyOutN implements marshal.Marshallable.CopyOutN.
//go:nosplit
func (i *IPTIP) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
- if !i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() {
+ if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
// Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay.
i.MarshalBytes(buf) // escapes: fallback.
@@ -2266,7 +2266,7 @@ func (i *IPTIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
// CopyIn implements marshal.Marshallable.CopyIn.
//go:nosplit
func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
- if !i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() {
+ if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
// Type IPTIP doesn't have a packed layout in memory, fall back to UnmarshalBytes.
buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay.
length, err := task.CopyInBytes(addr, buf) // escapes: okay.
@@ -3001,7 +3001,7 @@ func (i *IP6TEntry) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (i *IP6TEntry) Packed() bool {
- return i.Counters.Packed() && i.IPv6.Packed()
+ return i.IPv6.Packed() && i.Counters.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -3057,7 +3057,7 @@ func (i *IP6TEntry) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
// CopyIn implements marshal.Marshallable.CopyIn.
//go:nosplit
func (i *IP6TEntry) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
- if !i.IPv6.Packed() && i.Counters.Packed() {
+ if !i.Counters.Packed() && i.IPv6.Packed() {
// Type IP6TEntry doesn't have a packed layout in memory, fall back to UnmarshalBytes.
buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay.
length, err := task.CopyInBytes(addr, buf) // escapes: okay.
@@ -3083,7 +3083,7 @@ func (i *IP6TEntry) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
// WriteTo implements io.WriterTo.WriteTo.
func (i *IP6TEntry) WriteTo(writer io.Writer) (int64, error) {
- if !i.Counters.Packed() && i.IPv6.Packed() {
+ if !i.IPv6.Packed() && i.Counters.Packed() {
// Type IP6TEntry doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := make([]byte, i.SizeBytes())
i.MarshalBytes(buf)
@@ -3203,7 +3203,7 @@ func (i *IP6TIP) Packed() bool {
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (i *IP6TIP) MarshalUnsafe(dst []byte) {
- if i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() {
+ if i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
safecopy.CopyIn(dst, unsafe.Pointer(i))
} else {
// Type IP6TIP doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -3213,7 +3213,7 @@ func (i *IP6TIP) MarshalUnsafe(dst []byte) {
// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (i *IP6TIP) UnmarshalUnsafe(src []byte) {
- if i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() {
+ if i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() {
safecopy.CopyOut(unsafe.Pointer(i), src)
} else {
// Type IP6TIP doesn't have a packed layout in memory, fallback to UnmarshalBytes.
diff --git a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go
index 8ad3a9306..5f85dbf5e 100644
--- a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go
@@ -344,7 +344,7 @@ func (s *Stat) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
// CopyIn implements marshal.Marshallable.CopyIn.
//go:nosplit
func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
- if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() {
+ if !s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() {
// Type Stat 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.
diff --git a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go
index 7f5936811..95995716f 100644
--- a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go
@@ -295,12 +295,12 @@ func (s *Stat) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (s *Stat) Packed() bool {
- return s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed()
+ return s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (s *Stat) MarshalUnsafe(dst []byte) {
- if s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() {
+ if s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() {
safecopy.CopyIn(dst, unsafe.Pointer(s))
} else {
// Type Stat doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -321,7 +321,7 @@ func (s *Stat) UnmarshalUnsafe(src []byte) {
// CopyOutN implements marshal.Marshallable.CopyOutN.
//go:nosplit
func (s *Stat) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
- if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() {
+ if !s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() {
// Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
s.MarshalBytes(buf) // escapes: fallback.
diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go
index 424b66f76..9fb351879 100644
--- a/pkg/sentry/platform/ring0/defs_impl_arm64.go
+++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go
@@ -1,10 +1,9 @@
package ring0
import (
+ "fmt"
"gvisor.dev/gvisor/pkg/sentry/arch"
"gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables"
-
- "fmt"
"gvisor.dev/gvisor/pkg/usermem"
"io"
"reflect"
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index c33434b75..0a9d3c6cf 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -1366,6 +1366,22 @@ func (e *endpoint) Readiness(mask waiter.EventMask) waiter.EventMask {
return result
}
+// verifyChecksum verifies the checksum unless RX checksum offload is enabled.
+// On IPv4, UDP checksum is optional, and a zero value means the transmitter
+// omitted the checksum generation (RFC768).
+// On IPv6, UDP checksum is not optional (RFC2460 Section 8.1).
+func verifyChecksum(r *stack.Route, hdr header.UDP, pkt *stack.PacketBuffer) bool {
+ if r.Capabilities()&stack.CapabilityRXChecksumOffload == 0 &&
+ (hdr.Checksum() != 0 || r.NetProto == header.IPv6ProtocolNumber) {
+ xsum := r.PseudoHeaderChecksum(ProtocolNumber, hdr.Length())
+ for _, v := range pkt.Data.Views() {
+ xsum = header.Checksum(v, xsum)
+ }
+ return hdr.CalculateChecksum(xsum) == 0xffff
+ }
+ return true
+}
+
// HandlePacket is called by the stack when new packets arrive to this transport
// endpoint.
func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, pkt *stack.PacketBuffer) {
@@ -1387,22 +1403,11 @@ func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, pk
return
}
- // Verify checksum unless RX checksum offload is enabled.
- // On IPv4, UDP checksum is optional, and a zero value means
- // the transmitter omitted the checksum generation (RFC768).
- // On IPv6, UDP checksum is not optional (RFC2460 Section 8.1).
- if r.Capabilities()&stack.CapabilityRXChecksumOffload == 0 &&
- (hdr.Checksum() != 0 || r.NetProto == header.IPv6ProtocolNumber) {
- xsum := r.PseudoHeaderChecksum(ProtocolNumber, hdr.Length())
- for _, v := range pkt.Data.Views() {
- xsum = header.Checksum(v, xsum)
- }
- if hdr.CalculateChecksum(xsum) != 0xffff {
- // Checksum Error.
- e.stack.Stats().UDP.ChecksumErrors.Increment()
- e.stats.ReceiveErrors.ChecksumErrors.Increment()
- return
- }
+ if !verifyChecksum(r, hdr, pkt) {
+ // Checksum Error.
+ e.stack.Stats().UDP.ChecksumErrors.Increment()
+ e.stats.ReceiveErrors.ChecksumErrors.Increment()
+ return
}
e.stack.Stats().UDP.PacketsReceived.Increment()
diff --git a/pkg/tcpip/transport/udp/protocol.go b/pkg/tcpip/transport/udp/protocol.go
index 63d4bed7c..f65751dd4 100644
--- a/pkg/tcpip/transport/udp/protocol.go
+++ b/pkg/tcpip/transport/udp/protocol.go
@@ -88,7 +88,12 @@ func (p *protocol) HandleUnknownDestinationPacket(r *stack.Route, id stack.Trans
r.Stack().Stats().UDP.MalformedPacketsReceived.Increment()
return true
}
- // TODO(b/129426613): only send an ICMP message if UDP checksum is valid.
+
+ if !verifyChecksum(r, hdr, pkt) {
+ // Checksum Error.
+ r.Stack().Stats().UDP.ChecksumErrors.Increment()
+ return true
+ }
// Only send ICMP error if the address is not a multicast/broadcast
// v4/v6 address or the source is not the unspecified address.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 23:34:44 +0000