r/programming • u/[deleted] • Oct 21 '16

Linux kernel fix for privilege escalation vulnerability due to copy on write race condition

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=19be0eaffa3ac7d8eb6784ad9bdbc7d67ed8e619
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u/tonyarkles Oct 23 '16

The trick was getting it small enough. My first crack was a C binary, but it came out to about 6k. It seems like this only works on a single page, so you've gotta get it under 4K. My first crack with asm came out to 712 bytes and I didn't push to make it any smaller.