diff options
| author | Michael Pratt <mpratt@google.com> | 2018-10-10 14:09:24 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-10-10 14:10:17 -0700 |
| commit | ddb34b3690c07f6c8efe2b96f89166145c4a7d3c (patch) | |
| tree | 781361c955c356d26b484f572bc4ad41a250ab72 /pkg/syserror/syserror.go | |
| parent | b78552d30e0af4122710e01bc86cbde6bb412686 (diff) | |
Enforce message size limits and avoid host calls with too many iovecs
Currently, in the face of FileMem fragmentation and a large sendmsg or
recvmsg call, host sockets may pass > 1024 iovecs to the host, which
will immediately cause the host to return EMSGSIZE.
When we detect this case, use a single intermediate buffer to pass to
the kernel, copying to/from the src/dst buffer.
To avoid creating unbounded intermediate buffers, enforce message size
checks and truncation w.r.t. the send buffer size. The same
functionality is added to netstack unix sockets for feature parity.
PiperOrigin-RevId: 216590198
Change-Id: I719a32e71c7b1098d5097f35e6daf7dd5190eff7
Diffstat (limited to 'pkg/syserror/syserror.go')
| -rw-r--r-- | pkg/syserror/syserror.go | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/pkg/syserror/syserror.go b/pkg/syserror/syserror.go index 6f8a7a319..5bc74e65e 100644 --- a/pkg/syserror/syserror.go +++ b/pkg/syserror/syserror.go @@ -44,6 +44,7 @@ var ( ELIBBAD = error(syscall.ELIBBAD) ELOOP = error(syscall.ELOOP) EMFILE = error(syscall.EMFILE) + EMSGSIZE = error(syscall.EMSGSIZE) ENAMETOOLONG = error(syscall.ENAMETOOLONG) ENOATTR = ENODATA ENODATA = error(syscall.ENODATA) |