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tcp: ulp: avoid module refcnt leak in tcp_set_ulp

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__tcp_ulp_find_autoload returns tcp_ulp_ops after taking a reference on
the module. Then, if ->init fails, tcp_set_ulp propagates the error but
nothing releases that reference.

Fixes: 734942cc4e ("tcp: ULP infrastructure")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2017-08-14 18:04:24 +02:00 committed by David S. Miller
parent bae514a688
commit 539a06baed
1 changed files with 7 additions and 7 deletions
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14
net/ipv4/tcp_ulp.c
View file

@ -122,14 +122,14 @@ int tcp_set_ulp(struct sock *sk, const char *name)
ulp_ops = __tcp_ulp_find_autoload(name);
if (!ulp_ops)
err = -ENOENT;
else
err = ulp_ops->init(sk);
return -ENOENT;
if (err)
goto out;
err = ulp_ops->init(sk);
if (err) {
module_put(ulp_ops->owner);
return err;
}
icsk->icsk_ulp_ops = ulp_ops;
out:
return err;
return 0;
}