Greeting, FYI, we noticed the following commit (built with gcc-9): commit: d6e28d35d522980af2fc1311a04d735d94f1df62 ("x86: Add straight-line-speculation mitigation") https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git x86/wip.sls in testcase: fsmark version: fsmark-x86_64-698ee57-1_20211108 with following parameters: iterations: 1x nr_threads: 64t disk: 1SSD fs: ext4 fs2: nfsv4 filesize: 4M test_size: 60G sync_method: NoSync cpufreq_governor: performance ucode: 0x700001e test-description: The fsmark is a file system benchmark to test synchronous write workloads, for example, mail servers workload. test-url: https://sourceforge.net/projects/fsmark/ on test machine: 144 threads 4 sockets Intel(R) Xeon(R) Gold 5318H CPU @ 2.50GHz with 128G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; [ 39.617768][ T1592] kernel BUG at arch/x86/kernel/alternative.c:1390! [ 39.617773][ T1592] invalid opcode: 0000 [#1] SMP NOPTI [ 39.617897][ T866] IOAPIC[5]: Preconfigured routing entry (13-3 -> IRQ 310 Level:1 ActiveLow:1) [ 39.621614][ T15] scsi host3: ahci [ 39.632644][ T1592] CPU: 66 PID: 1592 Comm: systemd-udevd Not tainted 5.16.0-rc1-00003-gd6e28d35d522 #1 [ 39.632647][ T1592] RIP: 0010:text_poke_loc_init (arch/x86/kernel/alternative.c:1390 (discriminator 1)) [ 39.639370][ T15] scsi host4: ahci [ 39.644309][ T1592] Code: 05 47 a5 1d 01 39 03 74 23 0f 0b 8b 44 24 38 89 45 04 eb be 66 81 3b 66 90 75 2a c6 45 08 eb c7 45 04 00 00 00 00 eb aa 0f 0b <0f> 0b 0f b6 05 1d a5 1d 01 38 43 04 75 d1 c6 45 08 e9 c7 45 04 00 All code ======== 0: 05 47 a5 1d 01 add $0x11da547,%eax 5: 39 03 cmp %eax,(%rbx) 7: 74 23 je 0x2c 9: 0f 0b ud2 b: 8b 44 24 38 mov 0x38(%rsp),%eax f: 89 45 04 mov %eax,0x4(%rbp) 12: eb be jmp 0xffffffffffffffd2 14: 66 81 3b 66 90 cmpw $0x9066,(%rbx) 19: 75 2a jne 0x45 1b: c6 45 08 eb movb $0xeb,0x8(%rbp) 1f: c7 45 04 00 00 00 00 movl $0x0,0x4(%rbp) 26: eb aa jmp 0xffffffffffffffd2 28: 0f 0b ud2 2a:* 0f 0b ud2 <-- trapping instruction 2c: 0f b6 05 1d a5 1d 01 movzbl 0x11da51d(%rip),%eax # 0x11da550 33: 38 43 04 cmp %al,0x4(%rbx) 36: 75 d1 jne 0x9 38: c6 45 08 e9 movb $0xe9,0x8(%rbp) 3c: c7 .byte 0xc7 3d: 45 04 00 rex.RB add $0x0,%al Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 0f b6 05 1d a5 1d 01 movzbl 0x11da51d(%rip),%eax # 0x11da526 9: 38 43 04 cmp %al,0x4(%rbx) c: 75 d1 jne 0xffffffffffffffdf e: c6 45 08 e9 movb $0xe9,0x8(%rbp) 12: c7 .byte 0xc7 13: 45 04 00 rex.RB add $0x0,%al [ 39.644311][ T1592] RSP: 0018:ffffc90020ad7b70 EFLAGS: 00010297 [ 39.644313][ T1592] RAX: 0000000000000001 RBX: ffffffff82203622 RCX: ffffffff82203631 [ 39.644314][ T1592] RDX: 00000000ffffffea RSI: ffffffff82203631 RDI: 00000000000000c3 [ 39.653224][ T15] scsi host5: ahci [ 39.656665][ T1592] RBP: ffffc90020ad7c18 R08: ffffc90020ad7b70 R09: 0000000000000001 [ 39.656667][ T1592] R10: ffff889882509a00 R11: 0000000000000002 R12: 0000000000000005 [ 39.656667][ T1592] R13: ffffffffc0e3c590 R14: ffffffff82203622 R15: ffffffffc0ee661c [ 39.656668][ T1592] FS: 00007f1984fc8d40(0000) GS:ffff88a025d00000(0000) knlGS:0000000000000000 [ 39.656669][ T1592] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.656671][ T1592] CR2: 000055a7547a4dd0 CR3: 000000011028c006 CR4: 00000000007706e0 [ 39.657725][ T1082] IOAPIC[9]: Preconfigured routing entry (17-2 -> IRQ 318 Level:1 ActiveLow:1) [ 39.666342][ T15] scsi host6: ahci [ 39.667411][ T1082] IOAPIC[9]: Preconfigured routing entry (17-3 -> IRQ 320 Level:1 ActiveLow:1) [ 39.671621][ T1592] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.671623][ T1592] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.671624][ T1592] PKRU: 55555554 [ 39.671625][ T1592] Call Trace: [ 39.671627][ T1592] <TASK> [ 39.675491][ T15] scsi host7: ahci [ 39.694642][ T1592] ? complete_emulated_wrmsr (arch/x86/kvm/x86.c:1830) kvm [ 39.700852][ T15] scsi host8: ahci [ 39.707076][ T884] IOAPIC[13]: Preconfigured routing entry (21-2 -> IRQ 328 Level:1 ActiveLow:1) [ 39.708385][ T1592] ? complete_emulated_wrmsr (arch/x86/kvm/x86.c:1830) kvm [ 39.716384][ T884] IOAPIC[13]: Preconfigured routing entry (21-3 -> IRQ 330 Level:1 ActiveLow:1) [ 39.716506][ T15] scsi host9: ahci [ 39.716547][ T15] ata3: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200100 irq 304 [ 39.716548][ T15] ata4: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200180 irq 304 [ 39.716551][ T15] ata5: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200200 irq 304 [ 39.716554][ T15] ata6: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200280 irq 304 [ 39.716560][ T15] ata7: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200300 irq 304 [ 39.716563][ T15] ata8: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200380 irq 304 [ 39.716566][ T15] ata9: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200400 irq 304 [ 39.716569][ T15] ata10: SATA max UDMA/133 abar m524288@0x92200000 port 0x92200480 irq 304 [ 39.719786][ T1592] text_poke_bp (arch/x86/kernel/alternative.c:1497) [ 39.719791][ T1592] arch_static_call_transform (arch/x86/kernel/static_call.c:117) [ 39.776402][ T1694] ata2: SATA link down (SStatus 4 SControl 300) [ 39.778612][ T1592] __static_call_init+0x15b/0x240 [ 39.778618][ T1592] static_call_module_notify (kernel/static_call.c:217 kernel/static_call.c:389 kernel/static_call.c:432) [ 39.787441][ T1692] ata1: SATA link down (SStatus 4 SControl 300) [ 39.795216][ T1592] notifier_call_chain_robust (kernel/notifier.c:83 kernel/notifier.c:118) [ 39.957258][ T1592] blocking_notifier_call_chain_robust (kernel/notifier.c:284 kernel/notifier.c:271) [ 39.963438][ T1592] load_module (include/linux/notifier.h:198 kernel/module.c:3923 kernel/module.c:4100) [ 39.967797][ T1592] ? __kernel_read (fs/read_write.c:439 (discriminator 1)) [ 39.972415][ T1592] ? __do_sys_finit_module (kernel/module.c:4224) [ 39.977639][ T1592] __do_sys_finit_module (kernel/module.c:4224) [ 39.982684][ T1592] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) [ 39.986957][ T1592] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:113) [ 39.992703][ T1592] RIP: 0033:0x7f19857b2f59 [ 39.996974][ T1592] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 07 6f 0c 00 f7 d8 64 89 01 48 All code ======== 0: 00 c3 add %al,%bl 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 8b 0d 07 6f 0c 00 mov 0xc6f07(%rip),%rcx # 0xc6f41 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 retq 9: 48 8b 0d 07 6f 0c 00 mov 0xc6f07(%rip),%rcx # 0xc6f17 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang