[ovs-dev] [PATCH v2 03/13] datapath: Fix race.
Jarno Rajahalme
jrajahalme at nicira.com
Thu Feb 13 21:24:33 UTC 2014
Thanks for the review.
Pushed to master, 2.1, 2.0, 1.11, 1.10, and 1.9,
Jarno
On Feb 12, 2014, at 3:35 PM, Pravin Shelar <pshelar at nicira.com> wrote:
> On Tue, Feb 11, 2014 at 4:07 PM, Jarno Rajahalme <jrajahalme at nicira.com> wrote:
>> ovs_vport_cmd_dump() did rcu_read_lock() only after getting the
>> datapath, which could have been deleted in between. Resolved by
>> taking rcu_read_lock() before the get_dp() call.
>>
>> Signed-off-by: Jarno Rajahalme <jrajahalme at nicira.com>
> Looks good.
>
> Acked-by: Pravin B Shelar <pshelar at nicira.com>
>
> Thanks.
>
>> ---
>> v2: No change
>>
>> datapath/datapath.c | 7 ++++---
>> 1 file changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/datapath/datapath.c b/datapath/datapath.c
>> index 289fabb..c423894 100644
>> --- a/datapath/datapath.c
>> +++ b/datapath/datapath.c
>> @@ -1766,11 +1766,12 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
>> int bucket = cb->args[0], skip = cb->args[1];
>> int i, j = 0;
>>
>> + rcu_read_lock();
>> dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
>> - if (!dp)
>> + if (!dp) {
>> + rcu_read_unlock();
>> return -ENODEV;
>> -
>> - rcu_read_lock();
>> + }
>> for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
>> struct vport *vport;
>>
>> --
>> 1.7.10.4
>>
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