View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000645 | AlmaLinux-10 | General | public | 2026-07-04 18:34 | 2026-07-07 01:34 |
| Reporter | mikeamb | Assigned To | |||
| Priority | normal | Severity | crash | Reproducibility | random |
| Status | new | Resolution | open | ||
| Platform | Zen4 EPYC 4464P, SMC H13SRD-F | OS | Almalinux | OS Version | 10 |
| Summary | 0000645: KVM AMD-V Random Crashes | ||||
| Description | Hello. I run many Almalinux systems with various AMD CPUs, a mix of Zen4 and Zen5. Over the years kernel patches for Zen4 bugs (which are many) have been pushed to fix stability particularly regarding virtualization platforms or nested virtualization. Over the past year or two I've still had seemingly completely random crashes for various reasons and I'm stumped. The most recent crash was on an Almalinux 10 system, kernel 6.12 (though similar crashes on mainline), with an Epyc 4464P processor. The things that stick out in my vmcore dump in /var/crash: [5516734.848500] Oops: invalid opcode: 0000 [#1] SMP NOPTI [5516734.848872] CPU: 13 UID: 107 PID: 3126435 Comm: CPU 0/KVM Kdump: loaded Not tainted 6.12.0-124.52.1.el10_1.x86_64 #1 PREEMPT(voluntary) [5516734.849343] Hardware name: Supermicro AS -3015MR-H8TNR/H13SRD-F, BIOS 1.8 12/23/2025 [5516734.849473] RIP: 0010:srso_alias_return_thunk+0x5/0xfbef5 Attached is a full copy of the vmcore-dmesg crash from my original file (to cut out the standard/useless log)... Anyone have any idea on this? It's seemingly impossible to reproduce, and is random, and seems to be related to a previous flaw mitigation patch for AMD, and related to memory corruption or vulnerability from a guest virtual machine. I thought about filing a kernel bug report but bugzilla is down, so hopefully someone here might have some insight. I have other AMD Zen4 EPYC systems with rare, random crashes, also related to the CPU/memory seemingly. | ||||
| Tags | No tags attached. | ||||
| Attached Files | vmcore-dmest-snippet.txt (4,983 bytes)
[5516734.848500] Oops: invalid opcode: 0000 [#1] SMP NOPTI [5516734.848872] CPU: 13 UID: 107 PID: 3126435 Comm: CPU 0/KVM Kdump: loaded Not tainted 6.12.0-124.52.1.el10_1.x86_64 #1 PREEMPT(voluntary) [5516734.849343] Hardware name: Supermicro AS -3015MR-H8TNR/H13SRD-F, BIOS 1.8 12/23/2025 [5516734.849473] RIP: 0010:srso_alias_return_thunk+0x5/0xfbef5 [5516734.849603] Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8d 64 24 08 c3 cc e8 f4 ff ff ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc [5516734.849885] RSP: 0018:ffffd2b8438ebba0 EFLAGS: 00010246 [5516734.850020] RAX: 00000000438ebb80 RBX: ffff8f23463dd2c1 RCX: 0000000000000000 [5516734.850167] RDX: 0000000000000000 RSI: 00000000000000c0 RDI: ffff8f23f6acb410 [5516734.850329] RBP: ffffffff8a504110 R08: 0000000000000000 R09: 0000000000000000 [5516734.850464] R10: ffffd2b8438ebcc8 R11: 0000000000000016 R12: ffffffffc0d74a27 [5516734.850599] R13: ffff8f2346a7b000 R14: ffff8f23f6acb458 R15: ffff8f23f6acb410 [5516734.850754] FS: 00007f8358d396c0(0000) GS:ffff8f51be540000(0000) knlGS:0000000000000000 [5516734.850892] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [5516734.851043] CR2: 00000037875fefc8 CR3: 0000000198d72000 CR4: 0000000000f50ef0 [5516734.851194] PKRU: 00000000 [5516734.851336] Call Trace: [5516734.851485] <TASK> [5516734.851617] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.851753] ? show_trace_log_lvl+0x255/0x2f0 [5516734.851890] ? show_trace_log_lvl+0x255/0x2f0 [5516734.852030] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.852165] ? kvm_vm_ioctl+0x60a/0xab0 [kvm] [5516734.852343] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.852477] ? __die_body.cold+0x8/0x12 [5516734.852610] ? die+0x2e/0x50 [5516734.852744] ? do_trap+0xca/0x110 [5516734.852877] ? do_error_trap+0x65/0x80 [5516734.853012] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.853145] ? exc_invalid_op+0x50/0x70 [5516734.853278] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.853410] ? asm_exc_invalid_op+0x1a/0x20 [5516734.853549] ? kvm_vm_ioctl_irq_line+0x27/0x40 [kvm] [5516734.853728] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.853864] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.853996] kvm_vm_ioctl+0x60a/0xab0 [kvm] [5516734.854165] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.854296] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.854428] ? vcpu_run+0x32/0x260 [kvm] [5516734.854604] ? kvm_arch_vcpu_ioctl_run+0x369/0x4e0 [kvm] [5516734.854759] ? kvm_vcpu_ioctl+0x114/0x7f0 [kvm] [5516734.854910] ? __x64_sys_ioctl+0x91/0xd0 [5516734.855065] ? do_syscall_64+0x7d/0x160 [5516734.855215] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.855374] ? kvm_vm_ioctl_irq_line+0x27/0x40 [kvm] [5516734.855545] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.855678] ? kvm_vm_ioctl+0x60a/0xab0 [kvm] [5516734.855827] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.855958] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.856099] ? syscall_exit_work+0xf3/0x120 [5516734.856235] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.856358] ? syscall_exit_to_user_mode+0x32/0x190 [5516734.856481] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.856607] ? do_syscall_64+0x89/0x160 [5516734.856720] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.856830] ? do_syscall_64+0x89/0x160 [5516734.856943] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.857097] ? do_syscall_64+0x89/0x160 [5516734.857244] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.857389] ? do_syscall_64+0x89/0x160 [5516734.857536] ? srso_alias_return_thunk+0x5/0xfbef5 [5516734.857687] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e [5516734.857794] </TASK> [5516734.857893] Modules linked in: act_police cls_u32 sch_ingress vhost_net vhost vhost_iotlb tap br_netfilter xt_physdev tun nft_meta_bridge ebt_ip ebt_arp xt_recent xt_CT ebt_ip6 bridge stp llc rfkill ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt ipt_REJECT nf_reject_ipv4 xt_LOG nf_log_syslog xt_comment nft_limit xt_limit xt_addrtype xt_conntrack nft_compat nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables sunrpc vfat fat amdgpu amd_atl intel_rapl_msr intel_rapl_common ipmi_ssif edac_mce_amd kvm_amd mlx5_ib kvm amdxcp gpu_sched drm_panel_backlight_quirks ib_uverbs cec drm_buddy drm_ttm_helper ttm macsec acpi_ipmi drm_exec irqbypass drm_suballoc_helper i2c_piix4 ast ipmi_si ib_core drm_display_helper pcspkr rapl k10temp i2c_algo_bit i2c_smbus mlx5_fwctl ipmi_devintf fwctl joydev ipmi_msghandler sch_fq fuse tcp_bbr loop ext4 mbcache jbd2 raid1 mlx5_core rndis_host cdc_ether nvme_tcp usbnet mii ccp nvme_fabrics nvme_keyring nvme mlxfw [5516734.857968] crct10dif_pclmul tls crc32_pclmul nvme_core crc32c_intel ghash_clmulni_intel psample video sp5100_tco nvme_auth pci_hyperv_intf wmi dm_mirror dm_region_hash dm_log dm_mod nfnetlink | ||||
