[Qemu-devel] [PATCH 0/3] qapi: fix crash in dealloc visitor for union types

[Michael Roth <mdroth@linux.vnet.ibm.com>]

This series introduces visit_start_enum and visit_end_enum as a way
of allowing visitors to trigger generated code to bail out on visiting
union fields if the visitor implementation deems doing so to be unsafe.

See patch 1 for the circumstances that cause the segfault in the
dealloc visitor.

This is a spin-off of a patch submitted by Fam Zheng earlier. See the
thread for additional background on why we're taking this approach:

  http://thread.gmane.org/gmane.comp.emulators.qemu/296090

Fam, if you'd like to break out your iotest into another patch I
can include it as part of this series, otherwise it can be sent as
a follow-up.

 include/qapi/visitor-impl.h             |  2 ++
 include/qapi/visitor.h                  |  2 ++
 qapi/qapi-dealloc-visitor.c             |  6 ++++++
 qapi/qapi-visit-core.c                  | 15 +++++++++++++++
 scripts/qapi-visit.py                   |  6 ++++++
 tests/qapi-schema/qapi-schema-test.json | 10 ++++++++++
 tests/qapi-schema/qapi-schema-test.out  |  3 +++
 tests/test-qmp-input-strict.c           | 17 +++++++++++++++++
 8 files changed, 61 insertions(+)