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[PKT_SCHED]: Correctly handle empty ematch trees

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Fixes an invalid memory reference when the basic classifier
is used without any ematches but just actions.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2005-11-08 09:39:17 -08:00 committed by David S. Miller
parent 18a0c23617
commit b541ca2c5a
1 changed files with 5 additions and 0 deletions
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5
net/sched/ematch.c
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@ -298,6 +298,11 @@ int tcf_em_tree_validate(struct tcf_proto *tp, struct rtattr *rta,
struct tcf_ematch_tree_hdr *tree_hdr;
struct tcf_ematch *em;
if (!rta) {
memset(tree, 0, sizeof(*tree));
return 0;
}
if (rtattr_parse_nested(tb, TCA_EMATCH_TREE_MAX, rta) < 0)
goto errout;