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[NETFILTER]: nf_conntrack: fix ct_extend ->move operation

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The ->move operation has two bugs:

- It is called with the same extension as source and destination,
  so it doesn't update the new extension.

- The address of the old extension is calculated incorrectly,
  instead of (void *)ct->ext + ct->ext->offset[i] it uses
  ct->ext + ct->ext->offset[i].

Fixes a crash on x86_64 reported by Chuck Ebbert <cebbert@redhat.com>
and Thomas Woerner <twoerner@redhat.com>.

Tested-by: Thomas Woerner <twoerner@redhat.com>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2008-02-07 17:56:34 -08:00
committed by David S. Miller
parent b2155e7f70
commit 86577c661b
3 changed files with 6 additions and 5 deletions
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include/net/netfilter/nf_conntrack_extend.h
+1 -1
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@@ -67,7 +67,7 @@ struct nf_ct_ext_type
void (*destroy)(struct nf_conn *ct);
/* Called when realloacted (can be NULL).
Contents has already been moved. */
void (*move)(struct nf_conn *ct, void *old);
void (*move)(void *new, void *old);
enum nf_ct_ext_id id;