To: vim_dev@googlegroups.com
Subject: Patch 8.1.0437
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 8.1.0437
Problem:    May access freed memory when syntax HL times out. (Philipp Gesang)
Solution:   Clear b_sst_first when clearing b_sst_array.
Files:	    src/syntax.c


*** ../vim-8.1.0436/src/syntax.c	2018-09-10 21:04:09.872392623 +0200
--- src/syntax.c	2018-09-28 22:18:50.261769939 +0200
***************
*** 1192,1197 ****
--- 1192,1198 ----
  	for (p = block->b_sst_first; p != NULL; p = p->sst_next)
  	    clear_syn_state(p);
  	VIM_CLEAR(block->b_sst_array);
+ 	block->b_sst_first = NULL;
  	block->b_sst_len = 0;
      }
  }
***************
*** 1323,1331 ****
      synstate_T	*p, *prev, *np;
      linenr_T	n;
  
-     if (block->b_sst_array == NULL)	/* nothing to do */
- 	return;
- 
      prev = NULL;
      for (p = block->b_sst_first; p != NULL; )
      {
--- 1324,1329 ----
***************
*** 1378,1384 ****
      int		dist;
      int		retval = FALSE;
  
!     if (syn_block->b_sst_array == NULL || syn_block->b_sst_first == NULL)
  	return retval;
  
      /* Compute normal distance between non-displayed entries. */
--- 1376,1382 ----
      int		dist;
      int		retval = FALSE;
  
!     if (syn_block->b_sst_first == NULL)
  	return retval;
  
      /* Compute normal distance between non-displayed entries. */
*** ../vim-8.1.0436/src/version.c	2018-09-25 22:27:31.958075001 +0200
--- src/version.c	2018-09-28 22:18:00.054149809 +0200
***************
*** 796,797 ****
--- 796,799 ----
  {   /* Add new patch number below this line */
+ /**/
+     437,
  /**/

-- 
hundred-and-one symptoms of being an internet addict:
109. You actually read -- and enjoy -- lists like this.

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
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