diff options
| author | Jiri Pirko <jiri@mellanox.com> | 2017-12-21 15:13:59 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-26 21:02:05 +0300 |
| commit | 4853f128c13ed2731625dff2410b7fdbe540fb26 (patch) | |
| tree | b58ac455944c25998e868de3e600fa2ca6906417 /net | |
| parent | 0a3d805c9c503e05d6e5d3868c53e92a06589dcf (diff) | |
| download | linux-4853f128c13ed2731625dff2410b7fdbe540fb26.tar.xz | |
net: sched: fix possible null pointer deref in tcf_block_put
We need to check block for being null in both tcf_block_put and
tcf_block_put_ext.
Fixes: 343723dd51ef ("net: sched: fix clsact init error path")
Reported-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/cls_api.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index b91ea03e3afa..b9d63d2246e6 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -379,6 +379,8 @@ void tcf_block_put(struct tcf_block *block) { struct tcf_block_ext_info ei = {0, }; + if (!block) + return; tcf_block_put_ext(block, block->q, &ei); } |