os: Reset input buffer's 'ignoreBytes' field

If a client sends a request larger than maxBigRequestSize, the server is
supposed to ignore it.

Before commit cf88363d, the server would simply disconnect the client.  After
that commit, it attempts to gracefully ignore the request by remembering how
long the client specified the request to be, and ignoring that many bytes.
However, if a client sends a BigReq header with a large size and disconnects
before actually sending the rest of the specified request, the server will
reuse the ConnectionInput buffer without resetting the ignoreBytes field.  This
makes the server ignore new X clients' requests.

This fixes that behavior by resetting the ignoreBytes field when putting the
ConnectionInput buffer back on the FreeInputs list.

Signed-off-by: Robert Morell <rmorell@nvidia.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/os/io.c b/os/io.c
index 2f091c417..0d980ab9f 100644
--- a/os/io.c
+++ b/os/io.c
@@ -1063,6 +1063,7 @@ FreeOsBuffers(OsCommPtr oc)
             oci->bufptr = oci->buffer;
             oci->bufcnt = 0;
             oci->lenLastReq = 0;
+            oci->ignoreBytes = 0;
         }
     }
     if ((oco = oc->output)) {