[lwip-devel] [patch #8425] netconn_free needs to check validity of semaphores

[TabascoEye]

URL:
  <http://savannah.nongnu.org/patch/?8425>

                 Summary: netconn_free needs to check validity of semaphores
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: tabascoeye
            Submitted on: Do 27 Mär 2014 15:41:20 GMT
                Category: sockets/netconn
                Priority: 7 - High
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

When a netconn_free() is called a second time on an already free'd netconn,
the sys_sem_free(&conn->op_completed); call is being executed without first
checking if the sem is still valid.
On my sys_arch implementation, calling sys_sem_free() on an already freed
semaphore leads to an assertion.

I propose in the attached patch that a check for validity of the semaphore
should be done before freeing and invalidating it (again).



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File Attachments:


-------------------------------------------------------
Date: Do 27 Mär 2014 15:41:20 GMT  Name: lwip_netcon_free.patch  Size: 475B  
By: tabascoeye

<http://savannah.nongnu.org/patch/download.php?file_id=31061>

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