3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <eduma...@google.com>
[ Upstream commit 9f0d3c2781baa1102108e16efbe640dd74564a7c ]
Commit 1d5783030a1 (ipv6/addrconf: speedup /proc/net/if_inet6 filling)
added bugs hiding some devices from if_inet6 and breaking applications.
"ip -6 addr" could still display all IPv6 addresses, while "ifconfig -a"
couldnt.
One way to reproduce the bug is by starting in a shell :
unshare -n /bin/bash
ifconfig lo up
And in original net namespace, lo device disappeared from if_inet6
Reported-by: Jan Hinnerk Stosch <janhinnerk.sto...@gmail.com>
Tested-by: Jan Hinnerk Stosch <janhinnerk.sto...@gmail.com>
Signed-off-by: Eric Dumazet <eduma...@google.com>
Cc: Mihai Maruseac <mihai.marus...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/ipv6/addrconf.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3095,14 +3095,15 @@ static struct inet6_ifaddr *if6_get_firs
struct hlist_node *n;
hlist_for_each_entry_rcu_bh(ifa, n,
&inet6_addr_lst[state->bucket],
addr_lst) {
+ if (!net_eq(dev_net(ifa->idev->dev), net))
+ continue;
/* sync with offset */
if (p < state->offset) {
p++;
continue;
}
state->offset++;
- if (net_eq(dev_net(ifa->idev->dev), net))
- return ifa;
+ return ifa;
}
/* prepare for next bucket */
@@ -3120,18 +3121,20 @@ static struct inet6_ifaddr *if6_get_next
struct hlist_node *n = &ifa->addr_lst;
hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) {
+ if (!net_eq(dev_net(ifa->idev->dev), net))
+ continue;
state->offset++;
- if (net_eq(dev_net(ifa->idev->dev), net))
- return ifa;
+ return ifa;
}
while (++state->bucket < IN6_ADDR_HSIZE) {
state->offset = 0;
hlist_for_each_entry_rcu_bh(ifa, n,
&inet6_addr_lst[state->bucket], addr_lst) {
+ if (!net_eq(dev_net(ifa->idev->dev), net))
+ continue;
state->offset++;
- if (net_eq(dev_net(ifa->idev->dev), net))
- return ifa;
+ return ifa;
}
}
--
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