Re: [PATCH v2] ipv6: do not free rt if FIB_LOOKUP_NOREF is set on suppress rule

[David Miller]

From: "Jason A. Donenfeld" <Jason@xxxxxxxxx>
Date: Tue, 24 Sep 2019 16:01:28 +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 added here
> causes the reference underflow by causing packets to evaluate a suppress
> rule.
> 
> Cc: stable@xxxxxxxxxxxxxxx

Please don't CC: stable for networking fixes, I handle these manually as per
the netdev FAQ.

> Fixes: 7d9e5f422150 ("ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF")
> Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>

Applied and queued up for -stable, thanks.