Package: rasdaemon Version: 0.6.7-1+b1 Severity: important Tags: upstream With linux-image-6.0.0-2-amd64 rasdaemon causes a kernel oops with a signature similar to this: BUG: kernel NULL pointer dereference, address: 00000000000001c8 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP NOPTI CPU: 11 PID: 1227 Comm: rasdaemon Tainted: P OE 6.0.0-2-amd64 #1 Debian 6.0.6-2 RIP: 0010:ring_buffer_wake_waiters+0x1c/0xa0
See https://lore.kernel.org/lkml/CAM6Wdxft33zLeeXHhmNX5jyJtfGTLiwkQSApc=10fqf+rqh...@mail.gmail.com/T/ for a discussion of the bug (easiest to start from the bottom). It seems that on systems which allow more cpus than are initialized[1], rasdaemon will attempt to poll non-existent cpus which causes a kernel oops. The fix for this reportedly causes rasdaemon to segfault which will likely require a fix there as well. A workaround for systems experiencing the oops with linux-image-6.0.0-2 is to disable rasdaemon. [1] On my system, dmesg reports smpboot: Allowing 32 CPUs, 16 hotplug CPUs for a system with 8 cores/16 threads
