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lpm: fix overflow issue

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LPM table overflow may occur if table is full and added rule has
the biggest depth that already have some rules.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
This commit is contained in:
Igor Ryzhov 2015-02-20 16:16:46 +03:00 committed by Thomas Monjalon
parent dc783e74cf
commit e128e53879
1 changed files with 3 additions and 0 deletions
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lib/librte_lpm/rte_lpm.c
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@ -298,6 +298,9 @@ rule_add(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
return rule_index; return rule_index;
} }
} }
if (rule_index == lpm->max_rules)
return -ENOSPC;
} else { } else {
/* Calculate the position in which the rule will be stored. */ /* Calculate the position in which the rule will be stored. */
rule_index = 0; rule_index = 0;