Kajetan Puchalski kajetan.puchalski@arm.com wrote:
While running the udp-flood test from stress-ng on Ampere Altra (Mt. Jade platform) I encountered a kernel panic caused by NULL pointer dereference within nf_conntrack.
The issue is present in the latest mainline (5.19-rc4), latest stable (5.18.8), as well as multiple older stable versions. The last working stable version I found was 5.15.40.
Do I need a special setup for conntrack?
No crashes after more than one hour of stress-ng on 1. 4 core amd64 Fedora 5.17 kernel 2. 16 core amd64, linux stable 5.17.15 3. 12 core intel, Fedora 5.18 kernel 4. 3 core aarch64 vm, 5.18.7-200.fc36.aarch64
I used standard firewalld ruleset for all of these and manually tuned conntrack settings to make sure the early evict path (as per backtrace) gets exercised.