On Fri, Nov 19, 2021 at 08:48:11AM +0100, Uwe Sauter wrote: > [ 1132.645038] BUG: unable to handle page fault for address: 0000000000400000 > [ 1132.645045] #PF: supervisor instruction fetch in kernel mode > [ 1132.645047] #PF: error_code(0x0010) - not-present page > [ 1132.645050] PGD 0 P4D 0 > [ 1132.645053] Oops: 0010 [#1] PREEMPT SMP PTI > [ 1132.645057] CPU: 7 PID: 429941 Comm: rsync Tainted: P OE > 5.15.2-arch1-1 #1 e3bfbeb633edc604ba956e06f24d5659e31c294f > [ 1132.645061] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./C226 WS, BIOS P3.40 06/25/2018 > [ 1132.645063] RIP: 0010:0x400000 Your computer was trying to execute instructions at 0x400000. This smells very much like a single bit flip; ie there was a function pointer which should have been NULL, but actually had one bit flip and so the CPU jumped to somewhere that doesn't have any memory backing it. Can you run memtest86, or whatever the current flavour of memory testing software is?
