diff options
| author | Brian Geffon <bgeffon@google.com> | 2019-01-08 17:12:14 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-01-08 17:13:17 -0800 |
| commit | dd761c170cc2d44eee20757a6088f80a9322342c (patch) | |
| tree | 02c73f2e2482e7cf5c5dd3a7f3a4081f184c9dc3 /pkg/sentry/syscalls | |
| parent | bc19103d589352d7a31f088585d68ef224eaed4c (diff) | |
Allow MSG_OOB and MSG_DONTROUTE to be no-ops on recvmsg(2).
PiperOrigin-RevId: 228428223
Change-Id: I433ba5ffc15ea4c2706ec944901b8269b1f364f8
Diffstat (limited to 'pkg/sentry/syscalls')
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_socket.go | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_socket.go b/pkg/sentry/syscalls/linux/sys_socket.go index 3049fe6e5..1513f28e7 100644 --- a/pkg/sentry/syscalls/linux/sys_socket.go +++ b/pkg/sentry/syscalls/linux/sys_socket.go @@ -63,6 +63,10 @@ var messageHeader64Len = uint64(binary.Size(MessageHeader64{})) // multipleMessageHeader64Len is the length of a multipeMessageHeader64 struct. var multipleMessageHeader64Len = uint64(binary.Size(multipleMessageHeader64{})) +// baseRecvFlags are the flags that are accepted across recvmsg(2), +// recvmmsg(2), and recvfrom(2). +const baseRecvFlags = linux.MSG_OOB | linux.MSG_DONTROUTE | linux.MSG_DONTWAIT | linux.MSG_NOSIGNAL | linux.MSG_WAITALL | linux.MSG_TRUNC | linux.MSG_CTRUNC + // MessageHeader64 is the 64-bit representation of the msghdr struct used in // the recvmsg and sendmsg syscalls. type MessageHeader64 struct { @@ -602,7 +606,7 @@ func RecvMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca } // Reject flags that we don't handle yet. - if flags & ^(linux.MSG_DONTWAIT|linux.MSG_NOSIGNAL|linux.MSG_PEEK|linux.MSG_TRUNC|linux.MSG_CTRUNC|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE|linux.MSG_WAITALL) != 0 { + if flags & ^(baseRecvFlags|linux.MSG_PEEK|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE) != 0 { return 0, nil, syscall.EINVAL } @@ -637,7 +641,7 @@ func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc } // Reject flags that we don't handle yet. - if flags & ^(linux.MSG_DONTWAIT|linux.MSG_NOSIGNAL|linux.MSG_TRUNC|linux.MSG_CTRUNC|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE|linux.MSG_WAITALL) != 0 { + if flags & ^(baseRecvFlags|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE) != 0 { return 0, nil, syscall.EINVAL } @@ -794,7 +798,7 @@ func recvFrom(t *kernel.Task, fd kdefs.FD, bufPtr usermem.Addr, bufLen uint64, f } // Reject flags that we don't handle yet. - if flags & ^(linux.MSG_DONTWAIT|linux.MSG_NOSIGNAL|linux.MSG_PEEK|linux.MSG_TRUNC|linux.MSG_CTRUNC|linux.MSG_CONFIRM|linux.MSG_WAITALL) != 0 { + if flags & ^(baseRecvFlags|linux.MSG_PEEK|linux.MSG_CONFIRM) != 0 { return 0, syscall.EINVAL } |