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mm: and drivers core: Convert hugetlb_report_node_meminfo to sysfs_emit

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Convert the unbound sprintf in hugetlb_report_node_meminfo to use
sysfs_emit_at so that no possible overrun of a PAGE_SIZE buf can occur.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Link: https://lore.kernel.org/r/894b351b82da6013cde7f36ff4b5493cd0ec30d0.1600285923.git.joe@perches.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joe Perches
2020-09-16 13:40:43 -07:00
committed by Greg Kroah-Hartman
父節點 948b3edba8
當前提交 7981593bf0
共有 3 個文件被更改，包括 13 次插入 和 11 次删除
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18
mm/hugetlb.c
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@@ -3582,18 +3582,20 @@ void hugetlb_report_meminfo(struct seq_file *m)
seq_printf(m, "Hugetlb: %8lu kB\n", total / 1024);
}
int hugetlb_report_node_meminfo(int nid, char *buf)
int hugetlb_report_node_meminfo(char *buf, int len, int nid)
{
struct hstate *h = &default_hstate;
if (!hugepages_supported())
return 0;
return sprintf(buf,
"Node %d HugePages_Total: %5u\n"
"Node %d HugePages_Free: %5u\n"
"Node %d HugePages_Surp: %5u\n",
nid, h->nr_huge_pages_node[nid],
nid, h->free_huge_pages_node[nid],
nid, h->surplus_huge_pages_node[nid]);
return sysfs_emit_at(buf, len,
"Node %d HugePages_Total: %5u\n"
"Node %d HugePages_Free: %5u\n"
"Node %d HugePages_Surp: %5u\n",
nid, h->nr_huge_pages_node[nid],
nid, h->free_huge_pages_node[nid],
nid, h->surplus_huge_pages_node[nid]);
}
void hugetlb_show_meminfo(void)