BUG_ON() in pfn_swap_entry_to_page()

Sebastian Andrzej Siewior
2022-03-22T17:25:07Z

Run into

|kernel BUG at include/linux/swapops.h:258!
|invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
|CPU: 10 PID: 1741 Comm: malloc-mem Not tainted 5.17.0-next-20220322 #19
|Hardware name: Intel Corporation S2600CP/S2600CP, BIOS SE5C600.86B.02.03.0003.041920141333 04/19/2014
|RIP: 0010:migration_entry_wait_on_locked+0x233/0x2c0
|Code: 66 90 e9 8a fe ff ff 66 90 e9 3d ff ff ff 48 8b 43 08 a8 01 0f 85 87 00 00 00 66 90 48 89 d8 48 8b 00 a8 01 0f 85 23 fe ff ff <0f> 0b 48 83 e8 01 48 89 c3 e9 29 fe ff ff 65 48 8b 04 25 00 c0 01
|RSP: 0000:ffffc9000a44bd78 EFLAGS: 00010246
|RAX: 002fffff80000000 RBX: ffffea0014a20000 RCX: ffffffff5aeffe00
|RDX: ffff88811b42e200 RSI: 0000000000000000 RDI: 000000000000001f
|RBP: ffff88811b42e200 R08: 0000000000000001 R09: 0000000000000000
|R10: 0000000000000000 R11: 0000000000000000 R12: 00007f7131200000
|R13: 0000000000000c48 R14: 0400000000000000 R15: fff000003fffffff
|FS: 00007f7145570580(0000) GS:ffff888a2aa80000(0000) knlGS:0000000000000000
|CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
|CR2: 00007f7131200000 CR3: 00000006f42c4006 CR4: 00000000000606e0
|Call Trace:
| <TASK>
| __handle_mm_fault+0x2bf/0x1810
| handle_mm_fault+0x136/0x3e0
| exc_page_fault+0x1d2/0x850
| asm_exc_page_fault+0x22/0x30

This is the BUG_ON() in pfn_swap_entry_to_page(). The box itself has no
swapspace configured. Is this something known?

Sebastian