Ryan, Good progress with your crashdump; thanks!
I could root cause the source of the BUG() / NULL pointer address 0x8, and its relation to the offending commit you identified. Could you please provide another crashdump, with the _working_ kernel 4.15.0-88, with the bcache device _mounted_? I'd like to check a few values in its structs. You should be able to force/trigger a crashdump in a working system with: $ echo c | sudo tee /proc/sysrq-trigger Please make sure you run 'sync' before triggering it, so commit any data to disk, and avoid losing it. Thank you! Mauricio -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867916 Title: Regression in kernel 4.15.0-91 causes kernel panic with Bcache To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1867916/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
