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genetlink: A genl_bind() to an out-of-range multicast group should not WARN().

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Users can request to bind to arbitrary multicast groups, so warning
when the requested group number is out of range is not appropriate.

And with the warning removed, and the 'err' variable properly given
an initial value, we can remove 'found' altogether.

Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2014-12-29 16:31:49 -05:00
parent 023e2cfa36
commit dc97a1a947
1 changed files with 1 additions and 6 deletions
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7
net/netlink/genetlink.c
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@ -985,8 +985,7 @@ static struct genl_multicast_group genl_ctrl_groups[] = {
static int genl_bind(struct net *net, int group)
{
int i, err;
bool found = false;
int i, err = 0;
down_read(&cb_lock);
for (i = 0; i < GENL_FAM_TAB_SIZE; i++) {
@ -1003,16 +1002,12 @@ static int genl_bind(struct net *net, int group)
err = f->mcast_bind(net, fam_grp);
else
err = 0;
found = true;
break;
}
}
}
up_read(&cb_lock);
if (WARN_ON(!found))
err = 0;
return err;
}