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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-05-25 07:34:04 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-25 17:55:32 -0400 |
| commit | 2907c35ff64708065e5a7fd54e8ded8263eb3074 (patch) | |
| tree | b5046b08b0b4b13c45a2fffef4ad3218c9db07d8 /net/core/fib_rules.c | |
| parent | 1dcb14d9e874d12bab9ceeba776b742f1682b0a6 (diff) | |
| download | op-kernel-dev-2907c35ff64708065e5a7fd54e8ded8263eb3074.zip op-kernel-dev-2907c35ff64708065e5a7fd54e8ded8263eb3074.tar.gz | |
net: hold rtnl again in dump callbacks
Commit e67f88dd12f6 (dont hold rtnl mutex during netlink dump callbacks)
missed fact that rtnl_fill_ifinfo() must be called with rtnl held.
Because of possible deadlocks between two mutexes (cb_mutex and rtnl),
its not easy to solve this problem, so revert this part of the patch.
It also forgot one rcu_read_unlock() in FIB dump_rules()
Add one ASSERT_RTNL() in rtnl_fill_ifinfo() to remind us the rule.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/fib_rules.c')
| -rw-r--r-- | net/core/fib_rules.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index 3911586..008dc70 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -602,6 +602,7 @@ static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb, skip: idx++; } + rcu_read_unlock(); cb->args[1] = idx; rules_ops_put(ops); |
