Re: [lwip-devel] Bug in core/mem.c

[Jason White]

Is there a bug filed for this?

-----Original Message-----
From: lwip-devel <address@hidden> On Behalf Of Matthias Pfaller
Sent: Tuesday, April 17, 2018 8:00 AM
To: address@hidden
Subject: [lwip-devel] Bug in core/mem.c

Hi,

I just tracked down a bug in mem.c that leads to sporadic memory corruption 
when LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT is active.

I think lfree needs to be declared volatile (static struct mem * volatile 
lfree). Otherwise the compiler might use the old value of lfree at the top of 
the for-loop in mem_malloc.

regards, Matthias
-- 
Matthias Pfaller                          Software Entwicklung
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