ofp-actions: Re-fix error path for parsing OpenFlow actions.

A previous commit attempted to fix the error path when the actions nested
within clone provoked an error.  However, this commit just introduced a new
problem in another case, since it made ofpacts_pull_openflow_actions__()
restore a previously valid pointer to data that might have been
reallocated.

This commit takes another approach.  Instead of trying to restore anything
at all, it just defines ofpacts_pull_openflow_actions__() to clear the
output buffer when there's an error.  It seems that this is less error
prone.  Most of the callers don't care; this commit fixes up the ones that
do.

Reported-at: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9975
Fixes: 20cdd1dbd546 ("ofp-actions: Avoid assertion failure for clone(ct(...bad actions...)).")
Signed-off-by: Ben Pfaff <blp@ovn.org>
Tested-by: Yifeng Sun <pkusunyifeng@gmail.com>
Reviewed-by: Yifeng Sun <pkusunyifeng@gmail.com>

0 files changed, 0 insertions, 0 deletions