neigh: prevent overflowing params in /proc/sys/net/ipv4/neigh/
Without this patch, the fields app_solicit, gc_thresh1, gc_thresh2, gc_thresh3, proxy_qlen, ucast_solicit, mcast_solicit could have assumed negative values when setting large numbers. Signed-off-by: NFrancesco Fusco <ffusco@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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