vim-patch:9.0.2158: [security]: use-after-free in check_argument_type

Problem:  [security]: use-after-free in check_argument_type
Solution: Reset function type pointer when freeing the function type
          list

function pointer fp->uf_func_type may point to the same memory, that was
allocated for fp->uf_type_list. However, when cleaning up a function
definition (e.g. because it was invalid), fp->uf_type_list will be
freed, but fp->uf_func_type may still point to the same (now) invalid
memory address.

So when freeing the fp->uf_type_list, check if fp->func_type points to
any of those types and if it does, reset the fp->uf_func_type pointer to
the t_func_any (default) type pointer

closes: vim/vim#13652

https://github.com/vim/vim/commit/0f28791b215bd4c22ed580839409c2f7d39d8140

Co-authored-by: Christian Brabandt <cb@256bit.org>

0 files changed, 0 insertions, 0 deletions