From: David Hunt <david.hunt@intel.com>
Date: Mon, 7 Jan 2019 14:39:34 +0000 (+0000)
Subject: power: fix frequency list to handle null buffer
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2e6ccdb4e0887e881de97fe51a038cacca1aedad;p=dpdk.git

power: fix frequency list to handle null buffer

This patch fixes a segfault in the case where a null buffer is passed
to the following functions:
   power_acpi_cpufreq_freqs()
   power_pstate_cpufreq_freqs()

Fixes: 445c6528b55f ("power: common interface for guest and host")

Signed-off-by: David Hunt <david.hunt@intel.com>
---

diff --git a/lib/librte_power/power_acpi_cpufreq.c b/lib/librte_power/power_acpi_cpufreq.c
index f50897b4dd..45412f0b99 100644
--- a/lib/librte_power/power_acpi_cpufreq.c
+++ b/lib/librte_power/power_acpi_cpufreq.c
@@ -445,6 +445,11 @@ power_acpi_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs, uint32_t num)
 		return 0;
 	}
 
+	if (freqs == NULL) {
+		RTE_LOG(ERR, POWER, "NULL buffer supplied\n");
+		return 0;
+	}
+
 	pi = &lcore_power_info[lcore_id];
 	if (num < pi->nb_freqs) {
 		RTE_LOG(ERR, POWER, "Buffer size is not enough\n");
diff --git a/lib/librte_power/power_pstate_cpufreq.c b/lib/librte_power/power_pstate_cpufreq.c
index 0f8e8f9706..9111e6a577 100644
--- a/lib/librte_power/power_pstate_cpufreq.c
+++ b/lib/librte_power/power_pstate_cpufreq.c
@@ -584,6 +584,11 @@ power_pstate_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs, uint32_t num)
 		return -1;
 	}
 
+	if (freqs == NULL) {
+		RTE_LOG(ERR, POWER, "NULL buffer supplied\n");
+		return 0;
+	}
+
 	pi = &lcore_power_info[lcore_id];
 	if (num < pi->nb_freqs) {
 		RTE_LOG(ERR, POWER, "Buffer size is not enough\n");