buglwIP - A Lightweight TCP/IP stack - Bugs: bug #49264, Crash Error when...


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bug #49264: Crash Error when LWIP_SOCKET_OFFSET is in use

Submitted by:  Arpit Agarwal <arpit_iitg>
Submitted on:  Tue 04 Oct 2016 08:41:40 AM UTC  
Category:  sockets/netconn Severity:  3 - Normal
Item Group:  Crash Error Status:  Fixed
Privacy:  Public Assigned to:  None
Open/Closed:  Closed Planned Release:  None
lwIP version:  git head

Tue 04 Oct 2016 10:35:23 AM UTC, comment #1: 

Thanks for reporting!

Dirk Ziegelmeier <dziegel>
Project Administrator
Tue 04 Oct 2016 08:41:40 AM UTC, original submission:  

Crash Error occur in lwip_socket_drop_registered_memberships API due to LWIP_ASSERT condition fail when LWIP_SOCKET_OFFSET is in use.

The reason is the assert condition i.e. "sockets[s].conn" which still uses the same value as passed in the function. I think this should have been adjusted when LWIP_SOCKET_OFFSET is in use.

Similarly the socket descriptor value is not adjusted in lwip_socket_register_membership / lwip_socket_unregister_membership APIs.

I suggest the following fix in all the three APIs mentioned:

s -= LWIP_SOCKET_OFFSET; //Code for fix

The Fix should be added in all the three API's at the very start, before any processing.

Arpit Agarwal <arpit_iitg>


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-10-04 dziegel StatusNone => Fixed
        Open/ClosedOpen => Closed
    2016-10-04 arpit_iitg Carbon-Copy- => Added amoghatth@gmail.com

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