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Re: [lwip-devel] sockets.c: Possible to return from lwip_select without

From: address@hidden
Subject: Re: [lwip-devel] sockets.c: Possible to return from lwip_select without decrementing sockets used
Date: Tue, 18 Apr 2017 20:49:58 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Thanks for the patches, I've just pushed them. However, we prefer to have patches sent to our patch tracker at https://savannah.nongnu.org/patch/?group=lwip since they easily get overlooke here in times where there are many mails and too little man power to catch up...


Tim Cussins:
Hi all,

Just updated to 0952e618, and found an issue in lwip_select:
It looks like we return without decrementing appropriate fd_used
when lwip_selscan returns < 0. See first patch.

Also included is a super bonus patch for sock_inc_used(), which
currently might fail to notice an overflow. The patch ensures
that the inc and test are done atomically.


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