diff options
| author | Hiroaki SHIMODA <shimoda.hiroaki@gmail.com> | 2012-08-06 09:45:48 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-07 00:30:01 +0400 |
| commit | 47fd92f5a76eb3f5b407773766e7d7fa1a179419 (patch) | |
| tree | fbebbe0628917989117a97ddf5737ceda816bccf | |
| parent | 9871f1ad677d95ffeca80e2c21b70af9bfc9cc91 (diff) | |
| download | linux-47fd92f5a76eb3f5b407773766e7d7fa1a179419.tar.xz | |
net_sched: act: Delete estimator in error path.
Some action modules free struct tcf_common in their error path
while estimator is still active. This results in est_timer()
dereference freed memory.
Add gen_kill_estimator() in ipt, pedit and simple action.
Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sched/act_ipt.c | 7 | ||||
| -rw-r--r-- | net/sched/act_pedit.c | 5 | ||||
| -rw-r--r-- | net/sched/act_simple.c | 5 |
3 files changed, 14 insertions, 3 deletions
diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c index 60e281ad0f07..58fb3c7aab9e 100644 --- a/net/sched/act_ipt.c +++ b/net/sched/act_ipt.c @@ -185,7 +185,12 @@ err3: err2: kfree(tname); err1: - kfree(pc); + if (ret == ACT_P_CREATED) { + if (est) + gen_kill_estimator(&pc->tcfc_bstats, + &pc->tcfc_rate_est); + kfree_rcu(pc, tcfc_rcu); + } return err; } diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c index 26aa2f6ce257..45c53ab067a6 100644 --- a/net/sched/act_pedit.c +++ b/net/sched/act_pedit.c @@ -74,7 +74,10 @@ static int tcf_pedit_init(struct nlattr *nla, struct nlattr *est, p = to_pedit(pc); keys = kmalloc(ksize, GFP_KERNEL); if (keys == NULL) { - kfree(pc); + if (est) + gen_kill_estimator(&pc->tcfc_bstats, + &pc->tcfc_rate_est); + kfree_rcu(pc, tcfc_rcu); return -ENOMEM; } ret = ACT_P_CREATED; diff --git a/net/sched/act_simple.c b/net/sched/act_simple.c index 3922f2a2821b..3714f60f0b3c 100644 --- a/net/sched/act_simple.c +++ b/net/sched/act_simple.c @@ -131,7 +131,10 @@ static int tcf_simp_init(struct nlattr *nla, struct nlattr *est, d = to_defact(pc); ret = alloc_defdata(d, defdata); if (ret < 0) { - kfree(pc); + if (est) + gen_kill_estimator(&pc->tcfc_bstats, + &pc->tcfc_rate_est); + kfree_rcu(pc, tcfc_rcu); return ret; } d->tcf_action = parm->action; |