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Message-ID: <3482600.6PjfSIYROA@stwm.de> Date: Thu, 30 Aug 2018 12:48:25 +0200 From: Wolfgang Walter <linux@...m.de> To: netdev@...r.kernel.org Cc: Wei Wang <weiwan@...gle.com> Subject: kernels >= v4.12 oops/crash with ipsec-traffic: partly bisected Hello, kernels >= 4.12 do not work on one of our main routers. They crash as soon as ipsec-tunnels are configured and ipsec-traffic actually flows. Just configuring ipsec (that is starting strongswan) does not trigger the oops. I finally found time to bisect that. Though I have not completed that yet, I already narrowed it down to the following commits good: d24406c85d123df773bc4df88ad5da2233896919 udp: call dst_hold_safe() in udp_sk_rx_set_dst() bad: 5b7c9a8ff828287af5aebe93e707271bf1a82cc3 net: remove dst gc related code Commits in between are almost all changes to remove dst gc. Now we have other machines which run just fine with the very same kernels doing ipsec. They differ insofar as they have much less cores, do not use the ixgbe driver, do not have 10G and terminate only a few tunnels instead of hundreds. I already tested distribution kernels > 4.12 from debian, they also crash. Regards, -- Wolfgang Walter Studentenwerk München Anstalt des öffentlichen Rechts
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