net/sysctl: use cpumask_parse in flow_limit_cpu_sysctl
cpumask_parse_user works on __user pointers, so this is wrong now. Fixes: 32927393 ("sysctl: pass kernel pointers to ->proc_handler") Reported-by:build test robot <lkp@intel.com> Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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