[PATCH 0/3] 9pfs: fix illegal names with Twstat rename

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

This series fixes a guest-triggerable assertion fault (DoS) caused by
sending an illegal new name with the legacy Twstat rename handler.

 - Patch 1: This is the core fix that prevents the DoS vulnerability.

 - Patch 2: Additionally rejects "." and ".." as new names with Twstat
   rename operations (not being a vulnerability though).

 - Patch 3: Consolidates the name validation logic spread multiple
   times over multiple request handlers.

Christian Schoenebeck (3):
  hw/9pfs: fix abort due to illegal name with Twstat rename
  hw/9pfs: reject . and .. in Twstat rename
  hw/9pfs: consolidate name validation with check_name()

 hw/9pfs/9p.c | 97 +++++++++++++++++++++++-----------------------------
 1 file changed, 42 insertions(+), 55 deletions(-)

-- 
2.47.3