lwIP - A Lightweight TCP/IP stack - Patches: patch #8425, netconn_free needs to check...
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patch #8425: netconn_free needs to check validity of semaphores
Submitter: | TabascoEye <tabascoeye> | ||
Submitted: | Thu 27 Mar 2014 03:41:20 PM UTC | ||
Category: | sockets/netconn | Priority: | 7 - High |
Status: | Invalid | Privacy: | Public |
Assigned to: | goldsimon | Open/Closed: | Closed |
Planned Release: | None |
Sun 18 Jan 2015 08:07:52 AM UTC, comment #1: |
Simon Goldschmidt <goldsimon> |
Thu 27 Mar 2014 03:41:20 PM UTC, original submission:
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.
|
TabascoEye <tabascoeye> |
Depends on the following items: None found
Items that depend on this one: None found
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Follow 4 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2015-01-18 | goldsimon | Status | None | Invalid | |
Assigned to | None | goldsimon | |||
Open/Closed | Open | Closed | |||
2014-03-27 | tabascoeye | Attached File | - | Added lwip_netcon_free.patch, #31061 |
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Corresponding source code
Checking for a valid op_completed won't help you here: you must not call netconn_free a second time as it calls memp_free on the netconn. And this is obviously not allowed a second time.