On 8/16/22 05:28, Peter Zijlstra wrote: > > Could you please test this; I've only compiled it. > When booting I get the following BUG: ------------[ cut here ]------------ kernel BUG at arch/x86/kernel/alternative.c:290! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.0.0-rc1-00001-gb72b03c96999 #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:apply_alternatives+0x287/0x2d0 Code: 4c 29 f6 03 74 24 13 89 74 24 13 45 85 c0 0f 85 d2 41 e9 00 41 0f b6 02 83 e0 fd 3c e9 0f 84 46 ff ff ff e9 5e fe ff ff 0f 0b <0f> 0b f7 c6 00 ff ff ff 0f 84 68 ff ff ff 8d 71 fb c6 44 24 12 e9 RSP: 0000:ffffffff82c03d68 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffffffff83728c24 RCX: 0000000000007fff RDX: 00000000ffffffea RSI: 0000000000000000 RDI: 000000000000ffff RBP: ffffffff82c03d7a R08: e800000010c4c749 R09: 0001e8cc00000001 R10: 10c48348cc000000 R11: e8ae0feb75ccff49 R12: ffffffff8372fcf8 R13: 0000000000000000 R14: ffffffff81001a68 R15: 000000000000001f FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88813ffff000 CR3: 0000000002c0c001 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: <TASK> ? insn_get_opcode+0xef/0x1c0 ? ct_nmi_enter+0xb3/0x180 ? ct_nmi_exit+0xbe/0x1d0 ? irqentry_exit+0x2d/0x40 ? asm_common_interrupt+0x22/0x40 alternative_instructions+0x5b/0xf5 check_bugs+0xdaf/0xdef start_kernel+0x66a/0x6a2 secondary_startup_64_no_verify+0xe0/0xeb </TASK> Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 0000000000000000 ]--- RIP: 0010:apply_alternatives+0x287/0x2d0 Code: 4c 29 f6 03 74 24 13 89 74 24 13 45 85 c0 0f 85 d2 41 e9 00 41 0f b6 02 83 e0 fd 3c e9 0f 84 46 ff ff ff e9 5e fe ff ff 0f 0b <0f> 0b f7 c6 00 ff ff ff 0f 84 68 ff ff ff 8d 71 fb c6 44 24 12 e9 RSP: 0000:ffffffff82c03d68 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffffffff83728c24 RCX: 0000000000007fff RDX: 00000000ffffffea RSI: 0000000000000000 RDI: 000000000000ffff RBP: ffffffff82c03d7a R08: e800000010c4c749 R09: 0001e8cc00000001 R10: 10c48348cc000000 R11: e8ae0feb75ccff49 R12: ffffffff8372fcf8 R13: 0000000000000000 R14: ffffffff81001a68 R15: 000000000000001f FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88813ffff000 CR3: 0000000002c0c001 CR4: 0000000000770ef0 PKRU: 55555554 Kernel panic - not syncing: Attempted to kill the idle task! Dumping ftrace buffer: (ftrace buffer empty) ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---
