fix(runtime): do not allow breakcheck inside runtime path calculation

problem: breakcheck might run arbitrary lua code, which might require
modules and thus invoke runtime path calculation recursively.
solution: Block the use of breakcheck when expanding glob patterns
inside 'runtimepath'

fixes #23012

1 files changed, 4 insertions, 3 deletions

diff --git a/src/nvim/regexp_nfa.c b/src/nvim/regexp_nfa.c
index 260d40a202..69d4f00ee5 100644
--- a/src/nvim/regexp_nfa.c
+++ b/src/nvim/regexp_nfa.c
@@ -5890,7 +5890,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm
   regsubs_T *r;
   // Some patterns may take a long time to match, especially when using
   // recursive_regmatch(). Allow interrupting them with CTRL-C.
-  fast_breakcheck();
+  reg_breakcheck();
   if (got_int) {
     return false;
   }
@@ -6020,7 +6020,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm
     for (listidx = 0; listidx < thislist->n; listidx++) {
       // If the list gets very long there probably is something wrong.
       // At least allow interrupting with CTRL-C.
-      fast_breakcheck();
+      reg_breakcheck();
       if (got_int) {
         break;
       }
@@ -7168,7 +7168,7 @@ nextchar:
     }
 
     // Allow interrupting with CTRL-C.
-    line_breakcheck();
+    reg_breakcheck();
     if (got_int) {
       break;
     }
@@ -7591,6 +7591,7 @@ static int nfa_regexec_nl(regmatch_T *rmp, uint8_t *line, colnr_T col, bool line
   rex.reg_win = NULL;
   rex.reg_ic = rmp->rm_ic;
   rex.reg_icombine = false;
+  rex.reg_nobreak = rmp->regprog->re_flags & RE_NOBREAK;
   rex.reg_maxcol = 0;
   return (int)nfa_regexec_both(line, col, NULL, NULL);
 }