I can confirm going from 4.15.0-88 to 4.15.0-91 on my bcache system
panics in the same way. Here's my layout:
-> sd{c,d,f,g,h}: each 4TB gpt, sd{c,d,f,g,h}1: each type linux_raid_member
--> md0: raid6, sd{c,d,f,g,h}1
--> sda: 512GB gpt, sda1: type bcache
---> bcache0: md0 + sda1
----> whatadisk_crypt: LUKS on bcache0
-----> LVM VG whatadisk: whatadisk_crypt
------> multiple LVs
There are also a handful of other disks (for example, nvme0n1 is the
encrypted boot disk), but the layout above is the only part which bcache
touches.
Happy to help with additional info or testing, please let me know.
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https://bugs.launchpad.net/bugs/1867916
Title:
Regression in kernel 4.15.0-91 causes kernel panic with Bcache
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