From: "Jason A. Donenfeld" <[email protected]> Date: Tue, 24 Sep 2019 09:36:15 +0200
> Commit 7d9e5f422150 removed references from certain dsts, but accounting > for this never translated down into the fib6 suppression code. This bug > was triggered by WireGuard users who use wg-quick(8), which uses the > "suppress-prefix" directive to ip-rule(8) for routing all of their > internet traffic without routing loops. The test case in the link of > this commit reliably triggers various crashes due to the use-after-free > caused by the reference underflow. > > Cc: [email protected] > Fixes: 7d9e5f422150 ("ipv6: convert major tx path to use > RT6_LOOKUP_F_DST_NOREF") > Test-case: > https://git.zx2c4.com/WireGuard/commit/?id=ad66532000f7a20b149e47c5eb3a957362c8e161 > Signed-off-by: Jason A. Donenfeld <[email protected]> Please make such test cases integratabe into the selftests area for networking and submit it along with this fix. Otherwise this code will regress. Thank you.
