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net/ipv6: Fix a test against 'ipv6_find_idev()' return value

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[ Upstream commit 178fe94405 ]

'ipv6_find_idev()' returns NULL on error, not an error pointer.
Update the test accordingly and return -ENOBUFS, as already done in
'addrconf_add_dev()', if NULL is returned.

Fixes: ("ipv6: allow userspace to add IFA_F_OPTIMISTIC addresses")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christophe JAILLET
2018-12-28 23:28:21 +01:00
committed by Greg Kroah-Hartman
parent 5ac4cc331b
commit fe3f820c18
1 changed files with 2 additions and 2 deletions
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4
net/ipv6/addrconf.c
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@@ -4711,8 +4711,8 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
IFA_F_MCAUTOJOIN | IFA_F_OPTIMISTIC;
idev = ipv6_find_idev(dev);
if (IS_ERR(idev))
return PTR_ERR(idev);
if (!idev)
return -ENOBUFS;
if (!ipv6_allow_optimistic_dad(net, idev))
cfg.ifa_flags &= ~IFA_F_OPTIMISTIC;