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| author | Jiri Pirko <jiri@mellanox.com> | 2017-05-20 15:01:31 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-23 11:00:06 -0400 |
| commit | 31efcc250a1dea96edca6595a9639d898cf99ae5 (patch) | |
| tree | a01dfd6bacdf9d2c395bbd1f7dfc63c191ede3d2 /net/sched/cls_api.c | |
| parent | 218b6a5b23e939caf2064549b1cb61ba22b9d0a1 (diff) | |
| download | linux-31efcc250a1dea96edca6595a9639d898cf99ae5.tar.gz linux-31efcc250a1dea96edca6595a9639d898cf99ae5.tar.bz2 linux-31efcc250a1dea96edca6595a9639d898cf99ae5.zip | |
net/sched: properly assign RCU pointer in tcf_chain_tp_insert/remove
*p_filter_chain is rcu-dereferenced on reader path. So here in writer,
property assign the pointer.
Fixes: 2190d1d0944f ("net: sched: introduce helpers to work with filter chains")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_api.c')
| -rw-r--r-- | net/sched/cls_api.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 4020b8d932a1..85088ed07f6a 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -351,7 +351,7 @@ static void tcf_chain_tp_insert(struct tcf_chain *chain, { if (chain->p_filter_chain && *chain_info->pprev == chain->filter_chain) - *chain->p_filter_chain = tp; + rcu_assign_pointer(*chain->p_filter_chain, tp); RCU_INIT_POINTER(tp->next, tcf_chain_tp_prev(chain_info)); rcu_assign_pointer(*chain_info->pprev, tp); } @@ -363,7 +363,7 @@ static void tcf_chain_tp_remove(struct tcf_chain *chain, struct tcf_proto *next = rtnl_dereference(chain_info->next); if (chain->p_filter_chain && tp == chain->filter_chain) - *chain->p_filter_chain = next; + RCU_INIT_POINTER(*chain->p_filter_chain, next); RCU_INIT_POINTER(*chain_info->pprev, next); } |