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authorRichard Laing <richard.laing@alliedtelesis.co.nz>2015-09-03 04:52:31 +0300
committerDavid S. Miller <davem@davemloft.net>2015-09-06 03:31:30 +0300
commit25b4a44c19c83d98e8c0807a7ede07c1f28eab8b (patch)
tree94f5ebf5140c803c584e6de36b47f5b619595196
parent724a7636ad026a3a68f3fc626ccd04111f65cfd9 (diff)
downloadlinux-25b4a44c19c83d98e8c0807a7ede07c1f28eab8b.tar.xz
net/ipv6: Correct PIM6 mrt_lock handling
In the IPv6 multicast routing code the mrt_lock was not being released correctly in the MFC iterator, as a result adding or deleting a MIF would cause a hang because the mrt_lock could not be acquired. This fix is a copy of the code for the IPv4 case and ensures that the lock is released correctly. Signed-off-by: Richard Laing <richard.laing@alliedtelesis.co.nz> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/ip6mr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 74ceb73c1c9a..5f36266b1f5e 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -550,7 +550,7 @@ static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
if (it->cache == &mrt->mfc6_unres_queue)
spin_unlock_bh(&mfc_unres_lock);
- else if (it->cache == mrt->mfc6_cache_array)
+ else if (it->cache == &mrt->mfc6_cache_array[it->ct])
read_unlock(&mrt_lock);
}