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examples/power: fix buffer overrun

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The freqs array in freq_info struct has RTE_MAX_LCORE_FREQS elements,
yet the code can attempt to look at the index at  RTE_MAX_LCORE,
which may be greater than RTE_MAX_LCORE_FREQS. Fix to limit index to
RTE_MAX_LCORE_FREQS.

Coverity issue: 337660
Fixes: d26c18c93260 ("examples/vm_power: cpu frequency in host")
Cc: stable@dpdk.org

Signed-off-by: David Hunt <david.hunt@intel.com>
Acked-by: Reshma Pattan <reshma.pattan@intel.com>
This commit is contained in:
David Hunt 2019-04-26 09:42:09 +01:00 committed by Thomas Monjalon
parent 7c22ccdd91
commit 3f1fc5f2cb
1 changed files with 1 additions and 1 deletions
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examples/vm_power_manager/power_manager.c
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@ -143,7 +143,7 @@ power_manager_get_current_frequency(unsigned core_num)
rte_spinlock_lock(&global_core_freq_info[core_num].power_sl);
index = rte_power_get_freq(core_num);
rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl);
if (index >= RTE_MAX_LCORE)
if (index >= RTE_MAX_LCORE_FREQS)
freq = 0;
else
freq = global_core_freq_info[core_num].freqs[index];