, 4 tweets, 1 min read Read on Twitter
We found several things here:
1. Flush+Reload enables highly reliable exploitation of DF bugs (change value exactly @ the right cycle) [1/4]
2. with F+R: first automated DF vs. DF-bug distinguisher (prev. "several days" of manual work)
3. Relation DF-bug (a value changes [2/4]
while assumed it cannot) <-> HTMs (value cannot change in a transaction): Wrap syscalls preventatively+autom. in TSX transactions->[3/4]
prevent DF-bugs (even compiler-introduced ones). TSX is fast -> some syscalls get faster + TSX transactions can be large [4/4]
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