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Switch sel_read_bool() from using get_zeroed_page() and free_page() to a stack-allocated buffer. This also fixes a memory leak in the error path when security_get_bool_value() returns an error. Reported-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com> Signed-off-by: Paul Moore <paul@paul-moore.com>