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net/ipv6: Correct PIM6 mrt_lock handling

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[ Upstream commit 25b4a44c19 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Laing
2015-09-03 13:52:31 +12:00
committed by Greg Kroah-Hartman
parent 162e3d1c34
commit 02b5ca779d
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/ip6mr.c
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@@ -552,7 +552,7 @@ 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);
}