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[NET_SCHED]: act_ipt: fix regression in ipt action

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The x_tables patch broke target module autoloading in the ipt action
by replacing the ipt_find_target call (which does autoloading) by
xt_find_target (which doesn't do autoloading). Additionally xt_find_target
may return ERR_PTR values in case of an error, which are not handled.

Use xt_request_find_target, which does both autoloading and ERR_PTR
handling properly. Also don't forget to drop the target module reference
again when xt_check_target fails.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-02-02 00:40:36 -08:00 committed by David S. Miller
parent e34efe3b10
commit 239a87c876
1 changed files with 5 additions and 3 deletions
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8
net/sched/act_ipt.c
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@ -55,7 +55,8 @@ static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int
struct ipt_target *target;
int ret = 0;
target = xt_find_target(AF_INET, t->u.user.name, t->u.user.revision);
target = xt_request_find_target(AF_INET, t->u.user.name,
t->u.user.revision);
if (!target)
return -ENOENT;
@ -63,9 +64,10 @@ static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int
ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t),
table, hook, 0, 0);
if (ret)
if (ret) {
module_put(t->u.kernel.target->me);
return ret;
}
if (t->u.kernel.target->checkentry
&& !t->u.kernel.target->checkentry(table, NULL,
t->u.kernel.target, t->data,