[lwip-devel] [bug #41686] ipv4 ip_reass() crash error

[hanhui]

URL:
  <http://savannah.nongnu.org/bugs/?41686>

                 Summary: ipv4 ip_reass() crash error
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: hanhui03
            Submitted on: Tue Feb 25 11:02:38 2014
                Category: IPv4
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: git head

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Details:

ip_reass()
{
   ...;
   /* find the previous entry in the linked list */
   for (ipr_prev = reassdatagrams_ipv4; ipr_prev != NULL; ipr = ipr->next) {
     if (ipr_prev->next == ipr) {
       break;
     }
   }

should be:
   
   /* find the previous entry in the linked list */
   if (ipr == reassdatagrams_ipv4) {
     ipr_prev = NULL;
   } else {
     for (ipr_prev = reassdatagrams_ipv4; ipr_prev != NULL; ipr = ipr->next)
{
       if (ipr_prev->next == ipr) {
         break;
       }
     }
   }
}

Han.hui




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