From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 17 Jun 2012 10:08:15 +0000 (+0000)
Subject: -fixing #2426
X-Git-Tag: initial-import-from-subversion-38251~13016
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=0190de8cfcc807dee7239b58f5dd71a7fe9b8668;p=oweals%2Fgnunet.git

-fixing #2426
---

diff --git a/src/fs/fs_download.c b/src/fs/fs_download.c
index fbbbc2f23..e31575cef 100644
--- a/src/fs/fs_download.c
+++ b/src/fs/fs_download.c
@@ -1121,7 +1121,7 @@ process_result_with_request (void *cls, const struct GNUNET_HashCode * key,
       {
 	/* 'chkarr' does not have enough space for this chk_idx;
 	   internal error! */
-	GNUNET_break (0);
+	GNUNET_break (0); GNUNET_assert (0);
 	dc->emsg = GNUNET_strdup (_("internal error decoding tree"));
 	goto signal_error;
       }
@@ -1536,15 +1536,20 @@ create_download_request (struct DownloadRequest *parent,
    * from the start (rounded down), either because of the requested
    * file offset or because this IBlock is further along */
   if (dr_offset < file_start_offset)
-    head_skip = file_start_offset / child_block_size;
+  {
+    head_skip = (file_start_offset - dr_offset) / child_block_size;
+  }
   else
+  {
     head_skip = 0;
+  }
   
   /* calculate index of last block at this level that is interesting (rounded up) */
   dr->num_children = (file_start_offset + desired_length - dr_offset) / child_block_size;
   if (dr->num_children * child_block_size <
       file_start_offset + desired_length - dr_offset)
     dr->num_children++;       /* round up */
+  GNUNET_assert (dr->num_children > head_skip);
   dr->num_children -= head_skip;
   if (dr->num_children > CHK_PER_INODE)
     dr->num_children = CHK_PER_INODE; /* cap at max */
@@ -1562,10 +1567,12 @@ create_download_request (struct DownloadRequest *parent,
   dr->children =
     GNUNET_malloc (dr->num_children * sizeof (struct DownloadRequest *));
   for (i = 0; i < dr->num_children; i++)
+  {
     dr->children[i] =
       create_download_request (dr, i + head_skip, depth - 1,
 			       dr_offset + (i + head_skip) * child_block_size,
 			       file_start_offset, desired_length);
+  }
   return dr;
 }