fs/proc/task_mmu.c v1: fix clear_refs_write() input sanity check
Andrew Morton pointed out similar string hacking and obfuscated check for zero-length input at the end of the function, David Rientjes suggested to use strict_strtol to replace simple_strtol, this patch cover above suggestions, add removing of leading and trailing whitespace from user input. It does not change function behavious. Signed-off-by: Vincent Li <macli@brc.ubc.ca> Acked-by: David Rientjes <rientjes@google.com> Cc: Matt Mackall <mpm@selenic.com> Cc: Amerigo Wang <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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