| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 32/59] ipv6/addrlabel: fix ip6addrlbl_get() | Date | Wed, 27 Jan 2016 10:15:20 -0800 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Ryabinin <aryabinin@virtuozzo.com>
[ Upstream commit e459dfeeb64008b2d23bdf600f03b3605dbb8152 ]
ip6addrlbl_get() has never worked. If ip6addrlbl_hold() succeeded, ip6addrlbl_get() will exit with '-ESRCH'. If ip6addrlbl_hold() failed, ip6addrlbl_get() will use about to be free ip6addrlbl_entry pointer.
Fix this by inverting ip6addrlbl_hold() check.
Fixes: 2a8cc6c89039 ("[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.") Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Reviewed-by: Cong Wang <cwang@twopensource.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/ipv6/addrlabel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/addrlabel.c +++ b/net/ipv6/addrlabel.c @@ -558,7 +558,7 @@ static int ip6addrlbl_get(struct sk_buff rcu_read_lock(); p = __ipv6_addr_label(net, addr, ipv6_addr_type(addr), ifal->ifal_index); - if (p && ip6addrlbl_hold(p)) + if (p && !ip6addrlbl_hold(p)) p = NULL; lseq = ip6addrlbl_table.seq; rcu_read_unlock();
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