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[lwip-devel] [bug #24032] pbuf realloc wander over the end of a linked l

From: Simon Goldschmidt
Subject: [lwip-devel] [bug #24032] pbuf realloc wander over the end of a linked list
Date: Tue, 26 Aug 2008 19:24:22 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9) Gecko/2008052906 Firefox/3.0

Follow-up Comment #2, bug #24032 (project lwip):

The second part of the patch (for pbuf_header) is simply wrong: you return 0
(= succeeded) when trying to take more of the pbuf than it has -> if anything,
returning 1 would be the right thing to do! (which is done by the LWIP_ERROR
you commented out)

As to the first part, of course Jonathan is right: this should never happen!
Nevertheless, ignoring this isn't good coding style - at least an assert
should be added which points you to the error instead of dereferencing a NULL
pointer (which I'll do now).


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