File chmlib-0.39-security-fixes.patch of Package kchmviewer

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File chmlib-0.39-security-fixes.patch of Package kchmviewer (Revision 6f1ec91f96c9e82bc9efdda7b0e8b6b2)

Currently displaying revision 6f1ec91f96c9e82bc9efdda7b0e8b6b2 , Show latest

--- ./chmlib/chm_lib.c.orig	2006-07-07 09:50:33.000000000 +0700
+++ ./chmlib/chm_lib.c	2007-02-03 17:45:15.000000000 +0700
@@ -66,13 +66,6 @@
 #include <strings.h>
 #endif
 
-/* RWE 6/13/2003 */
-#ifdef _WIN32_WCE
-#define FREEBUF(x) free(x)
-#else
-#define FREEBUF(x) /* do nothing */
-#endif
-
 #ifdef WIN32
 #include <windows.h>
 #include <malloc.h>
@@ -771,6 +764,8 @@
 
     /* allocate handle */
     newHandle = (struct chmFile *)malloc(sizeof(struct chmFile));
+    if (newHandle == NULL)
+    return NULL;
     newHandle->fd = CHM_NULL_FD;
     newHandle->lzx_state = NULL;
     newHandle->cache_blocks = NULL;
@@ -1037,7 +1032,9 @@
 
                 /* allocate new cached blocks */
                 newBlocks = (UChar **)malloc(paramVal * sizeof (UChar *));
+		if (newBlocks == NULL) return;
                 newIndices = (UInt64 *)malloc(paramVal * sizeof (UInt64));
+		if (newIndices == NULL) { free(newBlocks); return; }
                 for (i=0; i<paramVal; i++)
                 {
                     newBlocks[i] = NULL;
@@ -1258,16 +1255,11 @@
     Int32 curPage;
 
     /* buffer to hold whatever page we're looking at */
-#ifdef WIN32
-#ifdef _WIN32_WCE
+
     /* RWE 6/12/2003 */
     UChar *page_buf = malloc(h->block_len);
-#else
-    UChar *page_buf = alloca(h->block_len);
-#endif
-#else
-    UChar page_buf[h->block_len];
-#endif
+if (page_buf == NULL)
+return CHM_RESOLVE_FAILURE;
 
     /* starting page */
     curPage = h->index_root;
@@ -1281,7 +1273,7 @@
                              (UInt64)h->dir_offset + (UInt64)curPage*h->block_len,
                              h->block_len) != h->block_len)
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return CHM_RESOLVE_FAILURE;
         }
 
@@ -1294,13 +1286,13 @@
                                               objPath);
             if (pEntry == NULL)
             {
-                FREEBUF(page_buf);
+                free(page_buf);
                 return CHM_RESOLVE_FAILURE;
             }
 
             /* parse entry and return */
             _chm_parse_PMGL_entry(&pEntry, ui);
-            FREEBUF(page_buf);
+            free(page_buf);
             return CHM_RESOLVE_SUCCESS;
         }
 
@@ -1311,13 +1303,13 @@
         /* else, we are confused.  give up. */
         else
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return CHM_RESOLVE_FAILURE;
         }
     }
 
     /* didn't find anything.  fail. */
-    FREEBUF(page_buf);
+    free(page_buf);
     return CHM_RESOLVE_FAILURE;
 }
 
@@ -1392,23 +1384,15 @@
                                    UInt64 block,
                                    UChar **ubuffer)
 {
-#ifdef WIN32
-#ifdef _WIN32_WCE
-    /* RWE 6/12/2003 */
     UChar *cbuffer = malloc(((unsigned int)h->reset_table.block_len + 6144));
-#else
-    UChar *cbuffer = alloca(((unsigned int)h->reset_table.block_len + 6144));
-#endif
-#else
-    UChar cbuffer[h->reset_table.block_len + 6144];     /* compressed buffer */
-#endif
     UInt64 cmpStart;                                    /* compressed start  */
     Int64 cmpLen;                                       /* compressed len    */
     int indexSlot;                                      /* cache index slot  */
     UChar *lbuffer;                                     /* local buffer ptr  */
     UInt32 blockAlign = (UInt32)(block % h->reset_blkcount); /* reset intvl. aln. */
     UInt32 i;                                           /* local loop index  */
-
+    if (cbuffer == NULL)
+    return -1;
     /* let the caching system pull its weight! */
     if (block - blockAlign <= h->lzx_last_block  &&
         block              >= h->lzx_last_block)
@@ -1434,10 +1418,14 @@
                 }
 
                 indexSlot = (int)((curBlockIdx) % h->cache_num_blocks);
-                h->cache_block_indices[indexSlot] = curBlockIdx;
                 if (! h->cache_blocks[indexSlot])
-                    h->cache_blocks[indexSlot] = (UChar *)malloc(
-                                                                 (unsigned int)(h->reset_table.block_len));
+		h->cache_blocks[indexSlot] = (UChar *)malloc((unsigned int)(h->reset_table.block_len));
+		if (! h->cache_blocks[indexSlot])
+		{
+		free(cbuffer);
+		return -1;
+		}
+		h->cache_block_indices[indexSlot] = curBlockIdx;
                 lbuffer = h->cache_blocks[indexSlot];
 
                 /* decompress the previous block */
@@ -1454,7 +1442,7 @@
 #ifdef CHM_DEBUG
                     fprintf(stderr, "   (DECOMPRESS FAILED!)\n");
 #endif
-                    FREEBUF(cbuffer);
+                    free(cbuffer);
                     return (Int64)0;
                 }
 
@@ -1475,10 +1463,14 @@
 
     /* allocate slot in cache */
     indexSlot = (int)(block % h->cache_num_blocks);
-    h->cache_block_indices[indexSlot] = block;
     if (! h->cache_blocks[indexSlot])
-        h->cache_blocks[indexSlot] = (UChar *)malloc(
-                                          ((unsigned int)h->reset_table.block_len));
+    h->cache_blocks[indexSlot] = (UChar *)malloc(((unsigned int)h->reset_table.block_len));
+    if (! h->cache_blocks[indexSlot])
+    {
+    free(cbuffer);
+    return -1;
+    }
+    h->cache_block_indices[indexSlot] = block;
     lbuffer = h->cache_blocks[indexSlot];
     *ubuffer = lbuffer;
 
@@ -1494,7 +1486,7 @@
 #ifdef CHM_DEBUG
         fprintf(stderr, "   (DECOMPRESS FAILED!)\n");
 #endif
-        FREEBUF(cbuffer);
+        free(cbuffer);
         return (Int64)0;
     }
     h->lzx_last_block = (int)block;
@@ -1502,7 +1494,7 @@
     /* XXX: modify LZX routines to return the length of the data they
      * decompressed and return that instead, for an extra sanity check.
      */
-    FREEBUF(cbuffer);
+    free(cbuffer);
     return h->reset_table.block_len;
 }
 
@@ -1627,16 +1619,9 @@
     Int32 curPage;
 
     /* buffer to hold whatever page we're looking at */
-#ifdef WIN32
-#ifdef _WIN32_WCE
     /* RWE 6/12/2003 */
     UChar *page_buf = malloc((unsigned int)h->block_len);
-#else
-    UChar *page_buf = alloca((unsigned int)h->block_len);
-#endif
-#else
-    UChar page_buf[h->block_len];
-#endif
+
     struct chmPmglHeader header;
     UChar *end;
     UChar *cur;
@@ -1647,6 +1632,8 @@
     struct chmUnitInfo ui;
     int type_bits = (what & 0x7);
     int filter_bits = (what & 0xF8);
+    if (page_buf == NULL)
+    return 0;
 
     /* starting page */
     curPage = h->index_head;
@@ -1661,7 +1648,7 @@
                              (UInt64)h->dir_offset + (UInt64)curPage*h->block_len,
                              h->block_len) != h->block_len)
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return 0;
         }
 
@@ -1670,7 +1657,7 @@
         lenRemain = _CHM_PMGL_LEN;
         if (! _unmarshal_pmgl_header(&cur, &lenRemain, &header))
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return 0;
         }
         end = page_buf + h->block_len - (header.free_space);
@@ -1682,7 +1669,7 @@
 
             if (! _chm_parse_PMGL_entry(&cur, &ui))
             {
-                FREEBUF(page_buf);
+                free(page_buf);
                 return 0;
             }
 
@@ -1722,12 +1709,12 @@
                 switch (status)
                 {
                     case CHM_ENUMERATOR_FAILURE:
-                        FREEBUF(page_buf);
+                        free(page_buf);
                         return 0;
                     case CHM_ENUMERATOR_CONTINUE:
                         break;
                     case CHM_ENUMERATOR_SUCCESS:
-                        FREEBUF(page_buf);
+                        free(page_buf);
                         return 1;
                     default:
                         break;
@@ -1739,7 +1726,7 @@
         curPage = header.block_next;
     }
 
-    FREEBUF(page_buf);
+    free(page_buf);
     return 1;
 }
 
@@ -1756,16 +1743,9 @@
     Int32 curPage;
 
     /* buffer to hold whatever page we're looking at */
-#ifdef WIN32
-#ifdef _WIN32_WCE
+
     /* RWE 6/12/2003 */
     UChar *page_buf = malloc((unsigned int)h->block_len);
-#else
-    UChar *page_buf = alloca((unsigned int)h->block_len);
-#endif
-#else
-    UChar page_buf[h->block_len];
-#endif
     struct chmPmglHeader header;
     UChar *end;
     UChar *cur;
@@ -1786,6 +1766,9 @@
     char lastPath[CHM_MAX_PATHLEN+1];
     int lastPathLen;
 
+if (page_buf == NULL)
+return 0;
+
     /* starting page */
     curPage = h->index_head;
 
@@ -1815,7 +1798,7 @@
                              (UInt64)h->dir_offset + (UInt64)curPage*h->block_len,
                              h->block_len) != h->block_len)
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return 0;
         }
 
@@ -1824,7 +1807,7 @@
         lenRemain = _CHM_PMGL_LEN;
         if (! _unmarshal_pmgl_header(&cur, &lenRemain, &header))
         {
-            FREEBUF(page_buf);
+            free(page_buf);
             return 0;
         }
         end = page_buf + h->block_len - (header.free_space);
@@ -1836,7 +1819,7 @@
 
             if (! _chm_parse_PMGL_entry(&cur, &ui))
             {
-                FREEBUF(page_buf);
+                free(page_buf);
                 return 0;
             }
 
@@ -1857,7 +1840,7 @@
             {
                 if (strncasecmp(ui.path, prefixRectified, prefixLen) != 0)
                 {
-                    FREEBUF(page_buf);
+                    free(page_buf);
                     return 1;
                 }
             }
@@ -1908,12 +1891,12 @@
                 switch (status)
                 {
                     case CHM_ENUMERATOR_FAILURE:
-                        FREEBUF(page_buf);
+                        free(page_buf);
                         return 0;
                     case CHM_ENUMERATOR_CONTINUE:
                         break;
                     case CHM_ENUMERATOR_SUCCESS:
-                        FREEBUF(page_buf);
+                        free(page_buf);
                         return 1;
                     default:
                         break;
@@ -1925,6 +1908,6 @@
         curPage = header.block_next;
     }
 
-    FREEBUF(page_buf);
+    free(page_buf);
     return 1;
 }

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File chmlib-0.39-security-fixes.patch of Package kchmviewer (Revision 6f1ec91f96c9e82bc9efdda7b0e8b6b2)

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