Headline
CVE-2022-3256: patch 9.0.0530: using freed memory when autocmd changes mark · vim/vim@8ecfa2c
Use After Free in GitHub repository vim/vim prior to 9.0.0530.
@@ -221,17 +221,19 @@ movemark(int count)
fname2fnum(jmp);
if (jmp->fmark.fnum != curbuf->b_fnum)
{
// jump to other file
if (buflist_findnr(jmp->fmark.fnum) == NULL)
// Make a copy, an autocommand may make “jmp” invalid.
fmark_T fmark = jmp->fmark;
// jump to the file with the mark
if (buflist_findnr(fmark.fnum) == NULL)
{ // Skip this one …
count += count < 0 ? -1 : 1;
continue;
}
if (buflist_getfile(jmp->fmark.fnum, jmp->fmark.mark.lnum,
0, FALSE) == FAIL)
if (buflist_getfile(fmark.fnum, fmark.mark.lnum, 0, FALSE) == FAIL)
return (pos_T *)NULL;
// Set lnum again, autocommands my have changed it
curwin->w_cursor = jmp->fmark.mark;
curwin->w_cursor = fmark.mark;
pos = (pos_T *)-1;
}
else
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