I am using PAX with most options enabled, and I have been getting kernel panics over the past month and with a serial console attached I can see the error: PAX: size overflow detected in function ext4_mb_scan_aligned fs/ext4/ext4.h:2110 cicus.1656_90 max, count: 213, decl: mb_find_extent; num: 2; context: fndecl; I am running the latest version of hardened-sources, getting the panic with both stable and ~ (4.9.23 and 4.8.17-r2). This piece of code looks related to running raid5/6 (which I am, and I am also running LVM and LUKS). I don't have the ability to debug this myself, though it may be a similar situation to https://github.com/zfsonlinux/zfs/issues/2505. I don't have any reproduction steps, as it seems to happen on an irregular basis, perhaps triggered most during disk writes, though that may be anecdote. General setup: x86_64 system Multiple HDDs in RAID6, LUKS, LVM, ext4
That specific error is while running hardened-sources 4.9.23 (I don't have the serial output from 4.8.17-r2)
No longer really required with the changes to hardened.