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+To: vim-dev@vim.org
+Subject: Patch 7.2.406
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.2.406
+Problem: Patch 7.2.119 introduces uninit mem read. (Dominique Pelle)
+Solution: Only used ScreeenLinesC when ScreeenLinesUC is not zero. (Yukihiro
+ Nakadaira) Also clear ScreeenLinesC when allocating.
+Files: src/screen.c
+
+
+*** ../vim-7.2.405/src/screen.c 2010-03-23 13:56:53.000000000 +0100
+--- src/screen.c 2010-03-23 15:26:44.000000000 +0100
+***************
+*** 25,34 ****
+ * one character which occupies two display cells.
+ * For UTF-8 a multi-byte character is converted to Unicode and stored in
+ * ScreenLinesUC[]. ScreenLines[] contains the first byte only. For an ASCII
+! * character without composing chars ScreenLinesUC[] will be 0. When the
+! * character occupies two display cells the next byte in ScreenLines[] is 0.
+ * ScreenLinesC[][] contain up to 'maxcombine' composing characters
+! * (drawn on top of the first character). They are 0 when not used.
+ * ScreenLines2[] is only used for euc-jp to store the second byte if the
+ * first byte is 0x8e (single-width character).
+ *
+--- 25,35 ----
+ * one character which occupies two display cells.
+ * For UTF-8 a multi-byte character is converted to Unicode and stored in
+ * ScreenLinesUC[]. ScreenLines[] contains the first byte only. For an ASCII
+! * character without composing chars ScreenLinesUC[] will be 0 and
+! * ScreenLinesC[][] is not used. When the character occupies two display
+! * cells the next byte in ScreenLines[] is 0.
+ * ScreenLinesC[][] contain up to 'maxcombine' composing characters
+! * (drawn on top of the first character). There is 0 after the last one used.
+ * ScreenLines2[] is only used for euc-jp to store the second byte if the
+ * first byte is 0x8e (single-width character).
+ *
+***************
+*** 4893,4898 ****
+--- 4894,4900 ----
+
+ /*
+ * Return if the composing characters at "off_from" and "off_to" differ.
++ * Only to be used when ScreenLinesUC[off_from] != 0.
+ */
+ static int
+ comp_char_differs(off_from, off_to)
+***************
+*** 6281,6286 ****
+--- 6283,6289 ----
+ /*
+ * Return TRUE if composing characters for screen posn "off" differs from
+ * composing characters in "u8cc".
++ * Only to be used when ScreenLinesUC[off] != 0.
+ */
+ static int
+ screen_comp_differs(off, u8cc)
+***************
+*** 6461,6468 ****
+ && c == 0x8e
+ && ScreenLines2[off] != ptr[1])
+ || (enc_utf8
+! && (ScreenLinesUC[off] != (u8char_T)(c >= 0x80 ? u8c : 0)
+! || screen_comp_differs(off, u8cc)))
+ #endif
+ || ScreenAttrs[off] != attr
+ || exmode_active;
+--- 6464,6473 ----
+ && c == 0x8e
+ && ScreenLines2[off] != ptr[1])
+ || (enc_utf8
+! && (ScreenLinesUC[off] !=
+! (u8char_T)(c < 0x80 && u8cc[0] == 0 ? 0 : u8c)
+! || (ScreenLinesUC[off] != 0
+! && screen_comp_differs(off, u8cc))))
+ #endif
+ || ScreenAttrs[off] != attr
+ || exmode_active;
+***************
+*** 7542,7548 ****
+ new_ScreenLinesUC = (u8char_T *)lalloc((long_u)(
+ (Rows + 1) * Columns * sizeof(u8char_T)), FALSE);
+ for (i = 0; i < p_mco; ++i)
+! new_ScreenLinesC[i] = (u8char_T *)lalloc((long_u)(
+ (Rows + 1) * Columns * sizeof(u8char_T)), FALSE);
+ }
+ if (enc_dbcs == DBCS_JPNU)
+--- 7547,7553 ----
+ new_ScreenLinesUC = (u8char_T *)lalloc((long_u)(
+ (Rows + 1) * Columns * sizeof(u8char_T)), FALSE);
+ for (i = 0; i < p_mco; ++i)
+! new_ScreenLinesC[i] = (u8char_T *)lalloc_clear((long_u)(
+ (Rows + 1) * Columns * sizeof(u8char_T)), FALSE);
+ }
+ if (enc_dbcs == DBCS_JPNU)
+*** ../vim-7.2.405/src/version.c 2010-03-23 14:39:07.000000000 +0100
+--- src/version.c 2010-03-23 15:34:11.000000000 +0100
+***************
+*** 683,684 ****
+--- 683,686 ----
+ { /* Add new patch number below this line */
++ /**/
++ 406,
+ /**/
+
+--
+VOICE OVER: As the horrendous Black Beast lunged forward, escape for Arthur
+ and his knights seemed hopeless, when, suddenly ... the animator
+ suffered a fatal heart attack.
+ANIMATOR: Aaaaagh!
+VOICE OVER: The cartoon peril was no more ... The Quest for Holy Grail could
+ continue.
+ "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD
+
+ /// 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 ///