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| author | Stephen Hemminger <shemminger@vyatta.com> | 2008-02-09 23:26:53 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-09 23:26:53 -0800 |
| commit | 954415e33ed6cfa932c13e8c2460bd05e50723b5 (patch) | |
| tree | 6587b63b3d5ba528b446eabf1c6af5134e4c3464 /net/sched/ematch.c | |
| parent | ed7af3b3501c8c4e3667c89c2c43347bf29ae237 (diff) | |
| download | linux-3.10-954415e33ed6cfa932c13e8c2460bd05e50723b5.tar.gz linux-3.10-954415e33ed6cfa932c13e8c2460bd05e50723b5.tar.bz2 linux-3.10-954415e33ed6cfa932c13e8c2460bd05e50723b5.zip | |
[PKT_SCHED] ematch: tcf_em_destroy robustness
Make the code in tcf_em_tree_destroy more robust and cleaner:
* Don't need to cast pointer to kfree() or avoid passing NULL.
* After freeing the tree, clear the pointer to avoid possible problems
from repeated free.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/ematch.c')
| -rw-r--r-- | net/sched/ematch.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/sched/ematch.c b/net/sched/ematch.c index d421ec728ee..b29439ddcf7 100644 --- a/net/sched/ematch.c +++ b/net/sched/ematch.c @@ -409,14 +409,15 @@ void tcf_em_tree_destroy(struct tcf_proto *tp, struct tcf_ematch_tree *tree) if (em->ops) { if (em->ops->destroy) em->ops->destroy(tp, em); - else if (!tcf_em_is_simple(em) && em->data) - kfree((void *) em->data); + else if (!tcf_em_is_simple(em)) + kfree(em->data); module_put(em->ops->owner); } } tree->hdr.nmatches = 0; kfree(tree->matches); + tree->matches = NULL; } EXPORT_SYMBOL(tcf_em_tree_destroy); |