add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/mm/memfd.c
..
..
@@ -330,7 +330,8 @@
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 	if (flags & MFD_ALLOW_SEALING) {
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 		file_seals = memfd_file_seals_ptr(file);
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-		*file_seals &= ~F_SEAL_SEAL;
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+		if (file_seals)
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+			*file_seals &= ~F_SEAL_SEAL;
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 	}
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 	fd_install(fd, file);