Re: [PATCH] thp, mm: Fix crash due race in MADV_FREE handling

[Dave Hansen]

I came up with the exact same patch.  For posterity, here's the test
case, generated by syzkaller and trimmed down by Reinette:

	https://www.sr71.net/~dave/intel/log2.c

And the config that helps detect this:

	https://www.sr71.net/~dave/intel/config-log2

Acked-by: Dave Hansen <dave.hansen@xxxxxxxxx>