btrfs: fix wrong max system array size check in kernel space
For system chunk array, We copy a "disk_key" and an chunk item each time, so there should be enough space to hold both of them, not only the chunk item. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
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@ -3921,7 +3921,8 @@ static int btrfs_add_system_chunk(struct btrfs_root *root,
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u8 *ptr;
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array_size = btrfs_super_sys_array_size(super_copy);
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if (array_size + item_size > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE)
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if (array_size + item_size + sizeof(disk_key)
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> BTRFS_SYSTEM_CHUNK_ARRAY_SIZE)
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return -EFBIG;
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ptr = super_copy->sys_chunk_array + array_size;
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