netfilter: don't xt_jumpstack_alloc twice in xt_register_table
In xt_register_table, xt_jumpstack_alloc is called first, later xt_replace_table is used. But in xt_replace_table, xt_jumpstack_alloc will be used again. Then the memory allocated by previous xt_jumpstack_alloc will be leaked. We can simply remove the previous xt_jumpstack_alloc because there aren't any users of newinfo between xt_jumpstack_alloc and xt_replace_table. Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Cc: Patrick McHardy <kaber@trash.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jan Engelhardt <jengelh@medozas.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Alexey Dobriyan <adobriyan@gmail.com> Acked-By: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
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@ -844,10 +844,6 @@ struct xt_table *xt_register_table(struct net *net,
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struct xt_table_info *private;
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struct xt_table *t, *table;
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ret = xt_jumpstack_alloc(newinfo);
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if (ret < 0)
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return ERR_PTR(ret);
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/* Don't add one object to multiple lists. */
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table = kmemdup(input_table, sizeof(struct xt_table), GFP_KERNEL);
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if (!table) {
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