sysctl: add some missing input constraint checks
Add boundaries of allowed input ranges for: dirty_expire_centisecs, drop_caches, overcommit_memory, page-cluster and panic_on_oom. Signed-off-by: Petr Holasek <pholasek@redhat.com> Acked-by: Dave Young <hidave.darkstar@gmail.com> Cc: David Rientjes <rientjes@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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