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cpu-topology: Fix the potential data corruption
Currently there are only 10 bytes to store the cpu-topology 'name' information. Only 10 bytes copied into cluster/thread/core names. If the cluster ID exceeds 2-digit number, it will result in the data corruption, and ending up in a dead loop in the parsing routines. The same applies to the thread names with more that 3-digit number. This issue was found using the boundary tests under virtualised environment like QEMU. Let us increase the buffer to fix such potential issues. Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com> Link: https://lore.kernel.org/r/1583294092-5929-1-git-send-email-prime.zeng@hisilicon.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 2 deletions
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@ -297,7 +297,7 @@ static int __init get_cpu_for_node(struct device_node *node)
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static int __init parse_core(struct device_node *core, int package_id,
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int core_id)
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{
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char name[10];
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char name[20];
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bool leaf = true;
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int i = 0;
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int cpu;
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@ -343,7 +343,7 @@ static int __init parse_core(struct device_node *core, int package_id,
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static int __init parse_cluster(struct device_node *cluster, int depth)
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{
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char name[10];
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char name[20];
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bool leaf = true;
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bool has_cores = false;
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struct device_node *c;
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