CVE-2022-2125: fix out-of-bounds read in getlispindent(); break out
of the inner loop on NUL byte (indent.c, upstream patch 8.2.5122)
CVE-2021-3974: fix use-after-free in nfaregmatch() when a substitute
callback frees the regline during a mark comparison; save col and
re-fetch rex.line via reggetline() after getmarkbuf() (regexp.c +
regexpnfa.c, upstream patch 8.2.3612)
CVE-2022-2206: fix OOB read after terminal resize lowers Rows below
cmdlinerow / msgrow; clamp both to Rows - 1 in check_shellsize()
(term.c, upstream patch 8.2.5160)
CVE-2022-2946: fix use-after-free in dotag() when 'tagfunc' deletes
the buffer; make a vimstrsave copy of the tagstack tagname before
calling user code (tag.c, upstream patch 9.0.0246)
CVE-2022-2286: fix heap-buffer-overflow in the Ctrl-E completion-stop
path when the completion leader shrinks below the original text;
bounds-check compllen against replacement string length before
insbytes_len() (insexpand.c, upstream patch 9.0.0020)