Apply by doing:
	cd /usr/src
	patch -p0 < 022_zlib.patch

And then rebuild and install libz:
	cd lib/libz
	make obj
	make depend
	make
	make install

You should also rebuild your kernel.

Index: lib/libz/README
===================================================================
RCS file: /cvs/src/lib/libz/README,v
retrieving revision 1.3
retrieving revision 1.3.12.1
diff -u -r1.3 -r1.3.12.1
--- lib/libz/README	8 Aug 1998 20:57:06 -0000	1.3
+++ lib/libz/README	14 Mar 2002 00:08:41 -0000	1.3.12.1
@@ -1,7 +1,7 @@
-zlib 1.1.3 is a general purpose data compression library.  All the code
+zlib 1.1.4 is a general purpose data compression library.  All the code
 is thread safe.  The data format used by the zlib library
 is described by RFCs (Request for Comments) 1950 to 1952 in the files 
-ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
 format) and rfc1952.txt (gzip format). These documents are also available in
 other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 
@@ -14,51 +14,50 @@
 
 To compile all files and run the test program, follow the instructions
 given at the top of Makefile. In short "make test; make install"
-should work for most machines. For Unix: "configure; make test; make install"
+should work for most machines. For Unix: "./configure; make test; make install"
 For MSDOS, use one of the special makefiles such as Makefile.msc.
 For VMS, use Make_vms.com or descrip.mms.
 
-Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov>, or to
+Questions about zlib should be sent to <zlib@gzip.org>, or to
 Gilles Vollant <info@winimage.com> for the Windows DLL version.
-The zlib home page is http://www.cdrom.com/pub/infozip/zlib/
-The official zlib ftp site is ftp://ftp.cdrom.com/pub/infozip/zlib/
-Before reporting a problem, please check those sites to verify that
+The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
+Before reporting a problem, please check this site to verify that
 you have the latest version of zlib; otherwise get the latest version and
 check whether the problem still exists or not.
 
-Mark Nelson <markn@tiny.com> wrote an article about zlib for the Jan. 1997
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
+before asking for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
-http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.1.3 are documented in the file ChangeLog.
-The main changes since 1.1.2 are:
+The changes made in version 1.1.4 are documented in the file ChangeLog.
+The only changes made since 1.1.3 are bug corrections:
 
-- fix "an inflate input buffer bug that shows up on rare but persistent
-  occasions" (Mark)
-- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
-- fix gzseek(..., SEEK_SET) in write mode
-- fix crc check after a gzeek (Frank Faubert)
-- fix miniunzip when the last entry in a zip file is itself a zip file
-  (J Lillge)
-- add contrib/asm586 and contrib/asm686 (Brian Raiter)
-  See http://www.muppetlabs.com/~breadbox/software/assembly.html
-- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
-- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
-- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
-- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
-- added a FAQ file
+- ZFREE was repeated on same allocation on some error conditions.
+  This creates a security problem described in
+  http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+  less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+  of 256 bytes. (A complete fix will be available in 1.1.5).
+
+The beta version 1.1.5beta includes many more changes. A new official
+version 1.1.5 will be released as soon as extensive testing has been
+completed on it.
 
-plus many changes for portability.
 
 Unsupported third party contributions are provided in directory "contrib".
 
-A Java implementation of zlib is available in the Java Development Kit 1.1
+A Java implementation of zlib is available in the Java Development Kit
 http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
-See the zlib home page http://www.cdrom.com/pub/infozip/zlib/ for details.
+See the zlib home page http://www.zlib.org for details.
 
 A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
-is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
-ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+is in the CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
 
 A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
 is available in Python 1.5 and later versions, see
@@ -117,7 +116,7 @@
 
 Copyright notice:
 
- (C) 1995-1998 Jean-loup Gailly and Mark Adler
+ (C) 1995-2002 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
Index: lib/libz/deflate.c
===================================================================
RCS file: /cvs/src/lib/libz/deflate.c,v
retrieving revision 1.4
retrieving revision 1.4.6.1
diff -u -r1.4 -r1.4.6.1
--- lib/libz/deflate.c	2 Mar 2000 00:29:51 -0000	1.4
+++ lib/libz/deflate.c	14 Mar 2002 00:08:41 -0000	1.4.6.1
@@ -1,6 +1,6 @@
-/*	$OpenBSD: deflate.c,v 1.4 2000/03/02 00:29:51 todd Exp $	*/
+/*	$OpenBSD: deflate.c,v 1.4.6.1 2002/03/14 00:08:41 miod Exp $	*/
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.1.3 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -242,7 +242,7 @@
         windowBits = -windowBits;
     }
     if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
-        windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+        windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
 	strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
         return Z_STREAM_ERROR;
     }
Index: lib/libz/infcodes.c
===================================================================
RCS file: /cvs/src/lib/libz/infcodes.c,v
retrieving revision 1.2
retrieving revision 1.2.12.1
diff -u -r1.2 -r1.2.12.1
--- lib/libz/infcodes.c	8 Aug 1998 20:57:17 -0000	1.2
+++ lib/libz/infcodes.c	14 Mar 2002 00:08:41 -0000	1.2.12.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: infcodes.c,v 1.2.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* infcodes.c -- process literals and length/distance pairs
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -196,15 +197,9 @@
       Tracevv((stderr, "inflate:         distance %u\n", c->sub.copy.dist));
       c->mode = COPY;
     case COPY:          /* o: copying bytes in window, waiting for space */
-#ifndef __TURBOC__ /* Turbo C bug for following expression */
-      f = (uInt)(q - s->window) < c->sub.copy.dist ?
-          s->end - (c->sub.copy.dist - (q - s->window)) :
-          q - c->sub.copy.dist;
-#else
       f = q - c->sub.copy.dist;
-      if ((uInt)(q - s->window) < c->sub.copy.dist)
-        f = s->end - (c->sub.copy.dist - (uInt)(q - s->window));
-#endif
+      while (f < s->window)             /* modulo window size-"while" instead */
+        f += s->end - s->window;        /* of "if" handles invalid distances */
       while (c->len)
       {
         NEEDOUT
Index: lib/libz/inffast.c
===================================================================
RCS file: /cvs/src/lib/libz/inffast.c,v
retrieving revision 1.2
retrieving revision 1.2.12.1
diff -u -r1.2 -r1.2.12.1
--- lib/libz/inffast.c	8 Aug 1998 20:57:19 -0000	1.2
+++ lib/libz/inffast.c	14 Mar 2002 00:08:41 -0000	1.2.12.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: inffast.c,v 1.2.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* inffast.c -- process literals and length/distance pairs fast
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -93,28 +94,41 @@
 
             /* do the copy */
             m -= c;
-            if ((uInt)(q - s->window) >= d)     /* offset before dest */
-            {                                   /*  just copy */
-              r = q - d;
-              *q++ = *r++;  c--;        /* minimum count is three, */
-              *q++ = *r++;  c--;        /*  so unroll loop a little */
-            }
-            else                        /* else offset after destination */
+            r = q - d;
+            if (r < s->window)                  /* wrap if needed */
             {
-              e = d - (uInt)(q - s->window); /* bytes from offset to end */
-              r = s->end - e;           /* pointer to offset */
-              if (c > e)                /* if source crosses, */
+              do {
+                r += s->end - s->window;        /* force pointer in window */
+              } while (r < s->window);          /* covers invalid distances */
+              e = s->end - r;
+              if (c > e)
               {
-                c -= e;                 /* copy to end of window */
+                c -= e;                         /* wrapped copy */
                 do {
-                  *q++ = *r++;
+                    *q++ = *r++;
                 } while (--e);
-                r = s->window;          /* copy rest from start of window */
+                r = s->window;
+                do {
+                    *q++ = *r++;
+                } while (--c);
               }
+              else                              /* normal copy */
+              {
+                *q++ = *r++;  c--;
+                *q++ = *r++;  c--;
+                do {
+                    *q++ = *r++;
+                } while (--c);
+              }
+            }
+            else                                /* normal copy */
+            {
+              *q++ = *r++;  c--;
+              *q++ = *r++;  c--;
+              do {
+                *q++ = *r++;
+              } while (--c);
             }
-            do {                        /* copy all or what's left */
-              *q++ = *r++;
-            } while (--c);
             break;
           }
           else if ((e & 64) == 0)
Index: lib/libz/inftrees.c
===================================================================
RCS file: /cvs/src/lib/libz/inftrees.c,v
retrieving revision 1.3
retrieving revision 1.3.12.1
diff -u -r1.3 -r1.3.12.1
--- lib/libz/inftrees.c	8 Aug 1998 20:57:23 -0000	1.3
+++ lib/libz/inftrees.c	14 Mar 2002 00:08:41 -0000	1.3.12.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: inftrees.c,v 1.3.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -11,7 +12,7 @@
 #endif
 
 const char inflate_copyright[] =
-   " inflate 1.1.3 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -104,8 +105,7 @@
 /* Given a list of code lengths and a maximum table size, make a set of
    tables to decode that set of codes.  Return Z_OK on success, Z_BUF_ERROR
    if the given code set is incomplete (the tables are still built in this
-   case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
-   lengths), or Z_MEM_ERROR if not enough memory. */
+   case), or Z_DATA_ERROR if the input is invalid. */
 {
 
   uInt a;                       /* counter for codes of length k */
@@ -231,7 +231,7 @@
 
         /* allocate new table */
         if (*hn + z > MANY)     /* (note: doesn't matter for fixed) */
-          return Z_MEM_ERROR;   /* not enough memory */
+          return Z_DATA_ERROR;  /* overflow of MANY */
         u[h] = q = hp + *hn;
         *hn += z;
 
Index: lib/libz/zlib.h
===================================================================
RCS file: /cvs/src/lib/libz/zlib.h,v
retrieving revision 1.4
retrieving revision 1.4.12.1
diff -u -r1.4 -r1.4.12.1
--- lib/libz/zlib.h	8 Aug 1998 20:57:32 -0000	1.4
+++ lib/libz/zlib.h	14 Mar 2002 00:08:41 -0000	1.4.12.1
@@ -1,7 +1,8 @@
+/*	$OpenBSD: zlib.h,v 1.4.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.1.3, July 9th, 1998
+  version 1.1.4, March 11th, 2002
 
-  Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
+  Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -37,7 +38,7 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.1.3"
+#define ZLIB_VERSION "1.1.4"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
Index: lib/libz/zutil.c
===================================================================
RCS file: /cvs/src/lib/libz/zutil.c,v
retrieving revision 1.4
retrieving revision 1.4.6.1
diff -u -r1.4 -r1.4.6.1
--- lib/libz/zutil.c	2 Mar 2000 00:29:52 -0000	1.4
+++ lib/libz/zutil.c	14 Mar 2002 00:08:41 -0000	1.4.6.1
@@ -1,6 +1,6 @@
-/*	$OpenBSD: zutil.c,v 1.4 2000/03/02 00:29:52 todd Exp $	*/
+/*	$OpenBSD: zutil.c,v 1.4.6.1 2002/03/14 00:08:41 miod Exp $	*/
 /* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -211,6 +211,8 @@
     unsigned size;
 {
     if (opaque) items += size - size; /* make compiler happy */
+    if (items * size == 0)
+	return (NULL);
     return (voidpf)calloc(items, size);
 }
 
Index: sys/lib/libz/infcodes.c
===================================================================
RCS file: /cvs/src/sys/lib/libz/infcodes.c,v
retrieving revision 1.5
retrieving revision 1.5.12.1
diff -u -r1.5 -r1.5.12.1
--- sys/lib/libz/infcodes.c	14 Feb 1999 19:47:37 -0000	1.5
+++ sys/lib/libz/infcodes.c	14 Mar 2002 00:08:41 -0000	1.5.12.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: infcodes.c,v 1.5.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* infcodes.c -- process literals and length/distance pairs
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -196,15 +197,9 @@
       Tracevv(("inflate:         distance %u\n", c->sub.copy.dist));
       c->mode = COPY;
     case COPY:          /* o: copying bytes in window, waiting for space */
-#ifndef __TURBOC__ /* Turbo C bug for following expression */
-      f = (uInt)(q - s->window) < c->sub.copy.dist ?
-          s->end - (c->sub.copy.dist - (q - s->window)) :
-          q - c->sub.copy.dist;
-#else
       f = q - c->sub.copy.dist;
-      if ((uInt)(q - s->window) < c->sub.copy.dist)
-        f = s->end - (c->sub.copy.dist - (uInt)(q - s->window));
-#endif
+      while (f < s->window)             /* modulo window size-"while" instead */
+        f += s->end - s->window;        /* of "if" handles invalid distances */
       while (c->len)
       {
         NEEDOUT
Index: sys/lib/libz/inffast.c
===================================================================
RCS file: /cvs/src/sys/lib/libz/inffast.c,v
retrieving revision 1.5
retrieving revision 1.5.12.1
diff -u -r1.5 -r1.5.12.1
--- sys/lib/libz/inffast.c	14 Feb 1999 19:47:37 -0000	1.5
+++ sys/lib/libz/inffast.c	14 Mar 2002 00:08:41 -0000	1.5.12.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: inffast.c,v 1.5.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* inffast.c -- process literals and length/distance pairs fast
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -93,28 +94,41 @@
 
             /* do the copy */
             m -= c;
-            if ((uInt)(q - s->window) >= d)     /* offset before dest */
-            {                                   /*  just copy */
-              r = q - d;
-              *q++ = *r++;  c--;        /* minimum count is three, */
-              *q++ = *r++;  c--;        /*  so unroll loop a little */
-            }
-            else                        /* else offset after destination */
+            r = q - d;
+            if (r < s->window)                  /* wrap if needed */
             {
-              e = d - (uInt)(q - s->window); /* bytes from offset to end */
-              r = s->end - e;           /* pointer to offset */
-              if (c > e)                /* if source crosses, */
+              do {
+                r += s->end - s->window;        /* force pointer in window */
+              } while (r < s->window);          /* covers invalid distances */
+              e = s->end - r;
+              if (c > e)
               {
-                c -= e;                 /* copy to end of window */
+                c -= e;                         /* wrapped copy */
                 do {
-                  *q++ = *r++;
+                    *q++ = *r++;
                 } while (--e);
-                r = s->window;          /* copy rest from start of window */
+                r = s->window;
+                do {
+                    *q++ = *r++;
+                } while (--c);
               }
+              else                              /* normal copy */
+              {
+                *q++ = *r++;  c--;
+                *q++ = *r++;  c--;
+                do {
+                    *q++ = *r++;
+                } while (--c);
+              }
+            }
+            else                                /* normal copy */
+            {
+              *q++ = *r++;  c--;
+              *q++ = *r++;  c--;
+              do {
+                *q++ = *r++;
+              } while (--c);
             }
-            do {                        /* copy all or what's left */
-              *q++ = *r++;
-            } while (--c);
             break;
           }
           else if ((e & 64) == 0)
Index: sys/lib/libz/inftrees.c
===================================================================
RCS file: /cvs/src/sys/lib/libz/inftrees.c,v
retrieving revision 1.8
retrieving revision 1.8.14.1
diff -u -r1.8 -r1.8.14.1
--- sys/lib/libz/inftrees.c	8 Sep 1998 04:07:48 -0000	1.8
+++ sys/lib/libz/inftrees.c	14 Mar 2002 00:08:41 -0000	1.8.14.1
@@ -1,5 +1,6 @@
+/*	$OpenBSD: inftrees.c,v 1.8.14.1 2002/03/14 00:08:41 miod Exp $	*/
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -11,7 +12,7 @@
 #endif
 
 const char inflate_copyright[] =
-   " inflate 1.1.3 Copyright 1995-1998 Mark Adler ";
+   " inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -104,8 +105,7 @@
 /* Given a list of code lengths and a maximum table size, make a set of
    tables to decode that set of codes.  Return Z_OK on success, Z_BUF_ERROR
    if the given code set is incomplete (the tables are still built in this
-   case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
-   lengths), or Z_MEM_ERROR if not enough memory. */
+   case), or Z_DATA_ERROR if the input is invalid. */
 {
 
   uInt a;                       /* counter for codes of length k */
@@ -231,7 +231,7 @@
 
         /* allocate new table */
         if (*hn + z > MANY)     /* (note: doesn't matter for fixed) */
-          return Z_MEM_ERROR;   /* not enough memory */
+          return Z_DATA_ERROR;  /* overflow of MANY */
         u[h] = q = hp + *hn;
         *hn += z;
 
Index: sys/lib/libz/zlib.h
===================================================================
RCS file: /cvs/src/sys/lib/libz/zlib.h,v
retrieving revision 1.5
retrieving revision 1.5.12.1
diff -u -r1.5 -r1.5.12.1
--- sys/lib/libz/zlib.h	25 Jan 1999 19:28:40 -0000	1.5
+++ sys/lib/libz/zlib.h	14 Mar 2002 00:08:41 -0000	1.5.12.1
@@ -1,7 +1,8 @@
+/*	$OpenBSD: zlib.h,v 1.5.12.1 2002/03/14 00:08:41 miod Exp $	*/
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.1.3, July 9th, 1998
+  version 1.1.4, March 11th, 2002
 
-  Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
+  Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -37,7 +38,7 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.1.3"
+#define ZLIB_VERSION "1.1.4"
 
 /* 
      The 'zlib' compression library provides in-memory compression and
Index: sys/net/zlib.c
===================================================================
RCS file: /cvs/src/sys/net/zlib.c,v
retrieving revision 1.9
retrieving revision 1.9.2.1
diff -u -r1.9 -r1.9.2.1
--- sys/net/zlib.c	29 Jan 2001 06:12:11 -0000	1.9
+++ sys/net/zlib.c	14 Mar 2002 00:08:39 -0000	1.9.2.1
@@ -3405,7 +3405,10 @@
       {
         r = t;
         if (r == Z_DATA_ERROR)
+        {
+          ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
           s->mode = BADB;
+        }
         LEAVE
       }
       s->sub.trees.index = 0;
@@ -3468,7 +3471,10 @@
         if (t != Z_OK)
         {
           if (t == (uInt)Z_DATA_ERROR)
+          {
+            ZFREE(z, s->sub.trees.blens, s->sub.trees.nblens * sizeof(uInt));
             s->mode = BADB;
+          }
           r = t;
           LEAVE
         }
Index: lib/libz/shlib_version
===================================================================
RCS file: /cvs/src/lib/libz/shlib_version,v
retrieving revision 1.4
diff -u -r1.4 shlib_version
--- lib/libz/shlib_version	8 Aug 1998 20:57:27 -0000	1.4
+++ lib/libz/shlib_version	15 Mar 2002 23:43:37 -0000
@@ -1,2 +1,2 @@
 major=1
-minor=3
+minor=4
