add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nilfs2/ioctl.c
..
..
@@ -70,7 +70,7 @@
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 	if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
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 		return -EINVAL;
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-	buf = (void *)__get_free_pages(GFP_NOFS, 0);
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+	buf = (void *)get_zeroed_page(GFP_NOFS);
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 	if (unlikely(!buf))
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 		return -ENOMEM;
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 	maxmembs = PAGE_SIZE / argv->v_size;
..
..
@@ -1129,7 +1129,14 @@
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 	minseg = range[0] + segbytes - 1;
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 	do_div(minseg, segbytes);
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+
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+	if (range[1] < 4096)
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+		goto out;
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+
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 	maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
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+	if (maxseg < segbytes)
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+		goto out;
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+
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 	do_div(maxseg, segbytes);
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 	maxseg--;
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