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net: use hlist_del_rcu() in dev_change_name()

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Using plain hlist_del() in dev_change_name() is wrong since a
concurrent reader can crash trying to dereference LIST_POISON1.

Bug introduced in commit 72c9528bab (net: Introduce
dev_get_by_name_rcu())

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-05-17 13:56:59 -04:00 committed by David S. Miller
parent 6f404e441d
commit 372b231201
1 changed files with 1 additions and 1 deletions
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2
net/core/dev.c
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@ -1007,7 +1007,7 @@ rollback:
}
write_lock_bh(&dev_base_lock);
hlist_del(&dev->name_hlist);
hlist_del_rcu(&dev->name_hlist);
write_unlock_bh(&dev_base_lock);
synchronize_rcu();