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+To: vim-dev@vim.org
+Subject: Patch 7.2.132
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=ISO-8859-1
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.2.132
+Problem: When changing directory during a SwapExists autocmd freed memory
+ may be accessed. (Dominique Pelle)
+Solution: Add the allbuf_lock flag.
+Files: src/ex_getln.c, src/globals.h, src/fileio.c,
+ src/proto/ex_getln.pro
+
+
+*** ../vim-7.2.131/src/ex_getln.c Mon Mar 2 02:11:09 2009
+--- src/ex_getln.c Mon Mar 2 00:53:39 2009
+***************
+*** 2000,2007 ****
+
+ #if defined(FEAT_AUTOCMD) || defined(PROTO)
+ /*
+! * Check if "curbuf_lock" is set and return TRUE when it is and give an error
+! * message.
+ */
+ int
+ curbuf_locked()
+--- 2000,2007 ----
+
+ #if defined(FEAT_AUTOCMD) || defined(PROTO)
+ /*
+! * Check if "curbuf_lock" or "allbuf_lock" is set and return TRUE when it is
+! * and give an error message.
+ */
+ int
+ curbuf_locked()
+***************
+*** 2011,2016 ****
+--- 2011,2031 ----
+ EMSG(_("E788: Not allowed to edit another buffer now"));
+ return TRUE;
+ }
++ return allbuf_locked();
++ }
++
++ /*
++ * Check if "allbuf_lock" is set and return TRUE when it is and give an error
++ * message.
++ */
++ int
++ allbuf_locked()
++ {
++ if (allbuf_lock > 0)
++ {
++ EMSG(_("E811: Not allowed to change buffer information now"));
++ return TRUE;
++ }
+ return FALSE;
+ }
+ #endif
+*** ../vim-7.2.131/src/globals.h Mon Mar 2 02:44:54 2009
+--- src/globals.h Mon Mar 2 02:40:16 2009
+***************
+*** 619,624 ****
+--- 619,629 ----
+ EXTERN int curbuf_lock INIT(= 0);
+ /* non-zero when the current buffer can't be
+ * changed. Used for FileChangedRO. */
++ EXTERN int allbuf_lock INIT(= 0);
++ /* non-zero when no buffer name can be
++ * changed, no buffer can be deleted and
++ * current directory can't be changed.
++ * Used for SwapExists et al. */
+ #endif
+ #ifdef FEAT_EVAL
+ # define HAVE_SANDBOX
+*** ../vim-7.2.131/src/fileio.c Wed Dec 31 16:20:54 2008
+--- src/fileio.c Sun Mar 1 23:37:10 2009
+***************
+*** 69,75 ****
+ static int au_find_group __ARGS((char_u *name));
+
+ # define AUGROUP_DEFAULT -1 /* default autocmd group */
+! # define AUGROUP_ERROR -2 /* errornouse autocmd group */
+ # define AUGROUP_ALL -3 /* all autocmd groups */
+ #endif
+
+--- 69,75 ----
+ static int au_find_group __ARGS((char_u *name));
+
+ # define AUGROUP_DEFAULT -1 /* default autocmd group */
+! # define AUGROUP_ERROR -2 /* erroneous autocmd group */
+ # define AUGROUP_ALL -3 /* all autocmd groups */
+ #endif
+
+***************
+*** 144,150 ****
+ # endif
+ #endif
+ static int move_lines __ARGS((buf_T *frombuf, buf_T *tobuf));
+!
+
+ void
+ filemess(buf, name, s, attr)
+--- 144,152 ----
+ # endif
+ #endif
+ static int move_lines __ARGS((buf_T *frombuf, buf_T *tobuf));
+! #ifdef FEAT_AUTOCMD
+! static char *e_auchangedbuf = N_("E812: Autocommands changed buffer or buffer name");
+! #endif
+
+ void
+ filemess(buf, name, s, attr)
+***************
+*** 295,300 ****
+--- 297,315 ----
+ int conv_restlen = 0; /* nr of bytes in conv_rest[] */
+ #endif
+
++ #ifdef FEAT_AUTOCMD
++ /* Remember the initial values of curbuf, curbuf->b_ffname and
++ * curbuf->b_fname to detect whether they are altered as a result of
++ * executing nasty autocommands. Also check if "fname" and "sfname"
++ * point to one of these values. */
++ buf_T *old_curbuf = curbuf;
++ char_u *old_b_ffname = curbuf->b_ffname;
++ char_u *old_b_fname = curbuf->b_fname;
++ int using_b_ffname = (fname == curbuf->b_ffname)
++ || (sfname == curbuf->b_ffname);
++ int using_b_fname = (fname == curbuf->b_fname)
++ || (sfname == curbuf->b_fname);
++ #endif
+ write_no_eol_lnum = 0; /* in case it was set by the previous read */
+
+ /*
+***************
+*** 589,595 ****
+--- 604,624 ----
+ #ifdef FEAT_QUICKFIX
+ if (!bt_dontwrite(curbuf))
+ #endif
++ {
+ check_need_swap(newfile);
++ #ifdef FEAT_AUTOCMD
++ /* SwapExists autocommand may mess things up */
++ if (curbuf != old_curbuf
++ || (using_b_ffname
++ && (old_b_ffname != curbuf->b_ffname))
++ || (using_b_fname
++ && (old_b_fname != curbuf->b_fname)))
++ {
++ EMSG(_(e_auchangedbuf));
++ return FAIL;
++ }
++ #endif
++ }
+ if (dir_of_file_exists(fname))
+ filemess(curbuf, sfname, (char_u *)_("[New File]"), 0);
+ else
+***************
+*** 668,673 ****
+--- 697,713 ----
+ #endif
+ {
+ check_need_swap(newfile);
++ #ifdef FEAT_AUTOCMD
++ if (!read_stdin && (curbuf != old_curbuf
++ || (using_b_ffname && (old_b_ffname != curbuf->b_ffname))
++ || (using_b_fname && (old_b_fname != curbuf->b_fname))))
++ {
++ EMSG(_(e_auchangedbuf));
++ if (!read_buffer)
++ close(fd);
++ return FAIL;
++ }
++ #endif
+ #ifdef UNIX
+ /* Set swap file protection bits after creating it. */
+ if (swap_mode > 0 && curbuf->b_ml.ml_mfp->mf_fname != NULL)
+***************
+*** 698,704 ****
+ {
+ int m = msg_scroll;
+ int n = msg_scrolled;
+- buf_T *old_curbuf = curbuf;
+
+ /*
+ * The file must be closed again, the autocommands may want to change
+--- 738,743 ----
+***************
+*** 740,747 ****
+--- 779,791 ----
+ /*
+ * Don't allow the autocommands to change the current buffer.
+ * Try to re-open the file.
++ *
++ * Don't allow the autocommands to change the buffer name either
++ * (cd for example) if it invalidates fname or sfname.
+ */
+ if (!read_stdin && (curbuf != old_curbuf
++ || (using_b_ffname && (old_b_ffname != curbuf->b_ffname))
++ || (using_b_fname && (old_b_fname != curbuf->b_fname))
+ || (fd = mch_open((char *)fname, O_RDONLY | O_EXTRA, 0)) < 0))
+ {
+ --no_wait_return;
+***************
+*** 6320,6326 ****
+
+ if (!stuff_empty() || global_busy || !typebuf_typed()
+ #ifdef FEAT_AUTOCMD
+! || autocmd_busy || curbuf_lock > 0
+ #endif
+ )
+ need_check_timestamps = TRUE; /* check later */
+--- 6364,6370 ----
+
+ if (!stuff_empty() || global_busy || !typebuf_typed()
+ #ifdef FEAT_AUTOCMD
+! || autocmd_busy || curbuf_lock > 0 || allbuf_lock > 0
+ #endif
+ )
+ need_check_timestamps = TRUE; /* check later */
+***************
+*** 6522,6529 ****
+--- 6566,6575 ----
+ set_vim_var_string(VV_FCS_REASON, (char_u *)reason, -1);
+ set_vim_var_string(VV_FCS_CHOICE, (char_u *)"", -1);
+ # endif
++ ++allbuf_lock;
+ n = apply_autocmds(EVENT_FILECHANGEDSHELL,
+ buf->b_fname, buf->b_fname, FALSE, buf);
++ --allbuf_lock;
+ busy = FALSE;
+ if (n)
+ {
+*** ../vim-7.2.131/src/proto/ex_getln.pro Fri Nov 28 10:59:57 2008
+--- src/proto/ex_getln.pro Sun Mar 1 00:27:12 2009
+***************
+*** 4,9 ****
+--- 4,10 ----
+ int text_locked __ARGS((void));
+ void text_locked_msg __ARGS((void));
+ int curbuf_locked __ARGS((void));
++ int allbuf_locked __ARGS((void));
+ char_u *getexline __ARGS((int c, void *dummy, int indent));
+ char_u *getexmodeline __ARGS((int promptc, void *dummy, int indent));
+ int cmdline_overstrike __ARGS((void));
+*** ../vim-7.2.131/src/version.c Wed Mar 4 04:11:56 2009
+--- src/version.c Thu Mar 5 03:08:54 2009
+***************
+*** 678,679 ****
+--- 678,681 ----
+ { /* Add new patch number below this line */
++ /**/
++ 132,
+ /**/
+
+--
+hundred-and-one symptoms of being an internet addict:
+168. You have your own domain name.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ download, build and distribute -- http://www.A-A-P.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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