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authorXiaotian Feng <dfeng@redhat.com>2010-11-02 16:11:05 +0000
committerDavid S. Miller <davem@davemloft.net>2010-11-03 18:50:07 -0700
commit41bb78b4b9adb21cf2c395b6b880aaae99c788b7 (patch)
tree34f099b4773150e0fa850d56be33fd46c3d29907 /net/x25
parent8200a59f24aeca379660f80658a8c0c343ca5c31 (diff)
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net dst: fix percpu_counter list corruption and poison overwritten
There're some percpu_counter list corruption and poison overwritten warnings in recent kernel, which is resulted by fc66f95c. commit fc66f95c switches to use percpu_counter, in ip6_route_net_init, kernel init the percpu_counter for dst entries, but, the percpu_counter is never destroyed in ip6_route_net_exit. So if the related data is freed by kernel, the freed percpu_counter is still on the list, then if we insert/remove other percpu_counter, list corruption resulted. Also, if the insert/remove option modifies the ->prev,->next pointer of the freed value, the poison overwritten is resulted then. With the following patch, the percpu_counter list corruption and poison overwritten warnings disappeared. Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "Pekka Savola (ipv6)" <pekkas@netcore.fi> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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