Re: [slab poison overwritten] Re: [GIT] Networking

[Eric Dumazet]

Le lundi 21 mars 2011 Ã 18:39 +0100, Ingo Molnar a Ãcrit :
> here's the same but with kallsyms enabled.
> 
> Thanks,
> 
> 	Ingo
> 
> [    9.585627] initcall 0xffffffff81d5b806 returned 0 after 0 usecs
> [    9.588960] calling  0xffffffff81d5b9da @ 1
> [    9.592303] IPVS: Creating netns size=1272 id=0
> [    9.595646] IPVS: __ip_vs_control_init(): alloc_percpu.
> [    9.602298] IPVS: cannot register namespace.
> [    9.605627] IPVS: can't setup control

It seems IPVS is busted in case of memory allocation error in 
__ip_vs_control_init()

IPVS deinits its "struct netns_ipvs" space, but something (in IPVS) uses
it after free.

__ip_vs_init() seems to be called before ip_vs_init() completes
correctly. We then keep in net->ipvs a pointer to some freed memory.

Commit 14e405461e664b7 did some changes in this area

Simon, any idea ?



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