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| author | Davide Caratti <dcaratti@redhat.com> | 2019-02-22 14:33:26 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-02-25 04:31:43 +0300 |
| commit | 6191da98062d25276a3b88fb2a94dcbcfb3ea65d (patch) | |
| tree | af18b890509ab7f2d3fc3a9ab75947f51ca409f6 /net/sched | |
| parent | 8f67c90ee9148eab3d2b4393c3cf76489b27f87c (diff) | |
| download | linux-6191da98062d25276a3b88fb2a94dcbcfb3ea65d.tar.xz | |
net/sched: act_skbedit: fix refcount leak when replace fails
when act_skbedit was converted to use RCU in the data plane, we added an
error path, but we forgot to drop the action refcount in case of failure
during a 'replace' operation:
# tc actions add action skbedit ptype otherhost pass index 100
# tc action show action skbedit
total acts 1
action order 0: skbedit ptype otherhost pass
index 100 ref 1 bind 0
# tc actions replace action skbedit ptype otherhost drop index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action show action skbedit
total acts 1
action order 0: skbedit ptype otherhost pass
index 100 ref 2 bind 0
Ensure we call tcf_idr_release(), in case 'params_new' allocation failed,
also when the action is being replaced.
Fixes: c749cdda9089 ("net/sched: act_skbedit: don't use spinlock in the data path")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/act_skbedit.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c index 64dba3708fce..cfceed28c333 100644 --- a/net/sched/act_skbedit.c +++ b/net/sched/act_skbedit.c @@ -189,8 +189,7 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla, params_new = kzalloc(sizeof(*params_new), GFP_KERNEL); if (unlikely(!params_new)) { - if (ret == ACT_P_CREATED) - tcf_idr_release(*a, bind); + tcf_idr_release(*a, bind); return -ENOMEM; } |