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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: kernel BUG around vmap/vfree - xen_enter_lazy_mmu()/xen_leave_lazy_mmu() - Linux 7.0-rc1
On 26/02/2026 1:17 pm, Marek Marczykowski-Górecki wrote: > Hi, > > When testing Linux 7.0-rc1 in PV dom0, I hit the following panic > sometimes: > > [ 436.849614] ------------[ cut here ]------------ > [ 436.849669] kernel BUG at arch/x86/include/asm/xen/hypervisor.h:78! > [ 436.849693] Oops: invalid opcode: 0000 [#1] SMP NOPTI > [ 436.849710] CPU: 3 UID: 0 PID: 4021 Comm: kworker/u25:1 Not tainted > 7.0.0-0.rc1.1.qubes.1001.fc41.x86_64 #1 PREEMPT(full) > [ 436.849729] Hardware name: Star Labs StarBook/StarBook, BIOS 8.97 > 10/03/2023 > [ 436.849743] Workqueue: i915_flip intel_atomic_commit_work [i915] > [ 436.850226] RIP: e030:xen_enter_lazy_mmu+0x24/0x30 > [ 436.850245] Code: 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 65 8b 05 b8 > e5 02 03 85 c0 75 10 65 c7 05 a9 e5 02 03 01 00 00 00 c3 cc cc cc cc <0f> 0b > 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 > [ 436.850270] RSP: e02b:ffffc90045727a68 EFLAGS: 00010202 > [ 436.850283] RAX: 0000000000000001 RBX: ffff8881042fa6d0 RCX: > 000fffffffe00000 > [ 436.850296] RDX: 0000000000000001 RSI: ffff88810a5a2980 RDI: > 0000000000000000 > [ 436.850308] RBP: ffffc90049eda000 R08: ffffc90049edc000 R09: > ffffc90049edc000 > [ 436.850320] R10: ffffc90049edc000 R11: ffffc90049edbfff R12: > ffffc90049edc000 > [ 436.850332] R13: ffffc90045727bb0 R14: ffffc90045727b28 R15: > 800000000000006b > [ 436.850356] FS: 0000000000000000(0000) GS:ffff888201e6e000(0000) > knlGS:0000000000000000 > [ 436.850371] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 436.850383] CR2: 00006543dbade250 CR3: 0000000115ef1000 CR4: > 0000000000050660 > [ 436.850401] Call Trace: > [ 436.850410] <TASK> > [ 436.850420] vmap_pages_pud_range+0x47c/0x530 > [ 436.850439] vmap_small_pages_range_noflush+0x1f1/0x2b0 > [ 436.850451] ? __get_vm_area_node+0x10a/0x170 > [ 436.850465] vmap+0x79/0xd0 > [ 436.850476] i915_gem_object_map_page+0x13b/0x210 [i915] > [ 436.850812] i915_gem_object_pin_map+0x1e2/0x210 [i915] > [ 436.851123] i915_gem_object_pin_map_unlocked+0x2d/0xa0 [i915] > [ 436.851424] intel_dsb_buffer_create+0xed/0x1a0 [i915] > [ 436.851778] intel_dsb_prepare+0xca/0x1a0 [i915] > [ 436.852110] intel_atomic_dsb_finish+0x92/0x350 [i915] > [ 436.852456] intel_atomic_commit_tail+0x326/0xd40 [i915] > [ 436.852769] process_one_work+0x18d/0x380 > [ 436.852779] worker_thread+0x196/0x300 > [ 436.852787] ? __pfx_worker_thread+0x10/0x10 > [ 436.852796] kthread+0xe3/0x120 > [ 436.852805] ? __pfx_kthread+0x10/0x10 > [ 436.852815] ret_from_fork+0x19e/0x260 > [ 436.852824] ? __pfx_kthread+0x10/0x10 > [ 436.852832] ret_from_fork_asm+0x1a/0x30 > [ 436.852842] </TASK> > [ 436.852847] Modules linked in: snd_seq_dummy snd_hrtimer > snd_hda_codec_intelhdmi snd_hda_codec_hdmi snd_hda_codec_alc269 > snd_hda_codec_realtek_lib snd_hda_scodec_component snd_hda_codec_generic > snd_hda_intel snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl > snd_sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt > snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink > snd_sof_intel_hda soundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_sof > snd_sof_utils snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks > soundwire_generic_allocation snd_soc_sdw_utils snd_soc_acpi crc8 > intel_rapl_msr soundwire_bus intel_rapl_common snd_soc_sdca snd_soc_avs > snd_soc_hda_codec snd_hda_ext_core snd_hda_codec vfat > intel_uncore_frequency_common fat snd_hda_core snd_intel_dspcfg > snd_intel_sdw_acpi snd_hwdep intel_powerclamp snd_soc_core iwlwifi > snd_compress spi_nor iTCO_wdt ac97_bus intel_pmc_bxt ee1004 mtd > snd_pcm_dmaengine snd_seq cfg80211 snd_seq_device pcspkr spi_intel_pci > snd_pcm rfkill spi_intel snd_timer snd > [ 436.852939] i2c_i801 soundcore i2c_smbus idma64 intel_pmc_core > pmt_telemetry pmt_discovery pmt_class intel_hid intel_pmc_ssram_telemetry > intel_scu_pltdrv sparse_keymap joydev loop fuse xenfs nfnetlink > vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport > vsock zram vmw_vmci lz4hc_compress lz4_compress dm_thin_pool > dm_persistent_data dm_bio_prison dm_crypt xe drm_ttm_helper > drm_suballoc_helper gpu_sched drm_gpuvm drm_exec drm_gpusvm_helper i915 > i2c_algo_bit drm_buddy hid_multitouch i2c_hid_acpi ghash_clmulni_intel video > nvme wmi ttm i2c_hid nvme_core nvme_keyring drm_display_helper nvme_auth > xhci_pci pinctrl_tigerlake thunderbolt hkdf cec xhci_hcd intel_vsec serio_raw > xen_acpi_processor xen_privcmd xen_pciback xen_blkback xen_gntalloc > xen_gntdev xen_evtchn scsi_dh_rdac scsi_dh_emc scsi_dh_alua uinput i2c_dev > [ 436.853183] ---[ end trace 0000000000000000 ]--- > > or this: > > [ 548.736884] ------------[ cut here ]------------ > [ 548.736907] kernel BUG at arch/x86/include/asm/xen/hypervisor.h:85! > [ 548.736923] Oops: invalid opcode: 0000 [#1] SMP NOPTI > [ 548.736935] CPU: 0 UID: 0 PID: 206 Comm: kworker/0:2 Not tainted > 7.0.0-0.rc1.1.qubes.1001.fc41.x86_64 #1 PREEMPT(full) > [ 548.736949] Hardware name: LENOVO 2347A45/2347A45, BIOS CBET4000 > Nitrokey-v0.2.0-2608-ga649597 01/01/1970 > [ 548.736962] Workqueue: events delayed_vfree_work > [ 548.736976] RIP: e030:xen_leave_lazy_mmu+0x44/0x50 > [ 548.736989] Code: 02 03 83 f8 01 75 23 65 c7 05 6c e4 02 03 00 00 00 00 65 > ff 0d 7d b8 02 03 74 05 c3 cc cc cc cc e8 61 5d fd ff c3 cc cc cc cc <0f> 0b > 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 > [ 548.737010] RSP: e02b:ffffc90040607cf0 EFLAGS: 00010297 > [ 548.737018] RAX: 0000000000000000 RBX: ffff888164a70408 RCX: > 0000000000000000 > [ 548.737029] RDX: 0000000000000000 RSI: 000ffffffffff000 RDI: > ffff8881069c0000 > [ 548.737039] RBP: ffffc90049681000 R08: ffffc90049681000 R09: > 0000000000000027 > [ 548.737050] R10: 0000000000000027 R11: fefefefefefefeff R12: > ffffc90049681000 > [ 548.737060] R13: ffff8881002fd258 R14: 0000000000000000 R15: > ffffc90040607dac > [ 548.737079] FS: 0000000000000000(0000) GS:ffff8881f88ee000(0000) > knlGS:0000000000000000 > [ 548.737090] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 548.737099] CR2: 000055576c2e6058 CR3: 000000010d47b000 CR4: > 0000000000050660 > [ 548.737115] Call Trace: > [ 548.737123] <TASK> > [ 548.737128] vunmap_pmd_range.isra.0+0x1f1/0x2e0 > [ 548.737142] vunmap_p4d_range+0x17d/0x290 > [ 548.737151] __vunmap_range_noflush+0x182/0x1d0 > [ 548.737161] ? _raw_spin_unlock+0xe/0x30 > [ 548.737171] remove_vm_area+0x40/0x70 > [ 548.737180] vfree.part.0+0x1b/0x290 > [ 548.737189] delayed_vfree_work+0x35/0x50 > [ 548.737198] process_one_work+0x18d/0x380 > [ 548.737207] worker_thread+0x196/0x300 > [ 548.737215] ? __pfx_worker_thread+0x10/0x10 > [ 548.737224] kthread+0xe3/0x120 > [ 548.737233] ? __pfx_kthread+0x10/0x10 > [ 548.737242] ret_from_fork+0x19e/0x260 > [ 548.737250] ? __pfx_kthread+0x10/0x10 > [ 548.737258] ret_from_fork_asm+0x1a/0x30 > [ 548.737269] </TASK> > [ 548.737274] Modules linked in: vfat fat snd_seq_dummy snd_hrtimer ath9k > ath9k_common snd_hda_codec_intelhdmi snd_hda_codec_hdmi ath9k_hw > snd_hda_codec_alc269 snd_hda_codec_realtek_lib snd_hda_scodec_component > snd_hda_codec_generic snd_hda_intel snd_hda_codec mac80211 snd_hda_core > snd_intel_dspcfg snd_intel_sdw_acpi snd_hwdep ath snd_seq snd_seq_device > snd_ctl_led cfg80211 snd_pcm at24 thinkpad_acpi intel_rapl_msr i2c_i801 > snd_timer sparse_keymap iTCO_wdt intel_rapl_common platform_profile > intel_powerclamp intel_pmc_bxt pcspkr i2c_smbus rfkill libarc4 snd soundcore > mei_me e1000e mei joydev lpc_ich loop fuse xenfs nfnetlink vsock_loopback > vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock zram > vmw_vmci lz4hc_compress lz4_compress dm_thin_pool dm_persistent_data > dm_bio_prison dm_crypt i915 i2c_algo_bit drm_buddy ghash_clmulni_intel ttm > sdhci_pci drm_display_helper sdhci_uhs2 sdhci video xhci_pci cqhci wmi cec > xhci_hcd ehci_pci mmc_core ehci_hcd serio_raw xen_acpi_processor xen_privcmd > xen_pciback > [ 548.737348] xen_blkback xen_gntalloc xen_gntdev xen_evtchn scsi_dh_rdac > scsi_dh_emc scsi_dh_alua uinput i2c_dev > [ 548.737469] ---[ end trace 0000000000000000 ]--- > > I don't have clear pattern when this happens, one was during host > suspend, but the other was during "normal" test run (starting/stopping > domUs and running stuff around them). Note also one of those is Intel > and the other AMD, so it isn't really hardware specific. > > Slightly more details with links (especially serial0.txt in the logs > tab) at > https://github.com/QubesOS/qubes-linux-kernel/pull/662#issuecomment-3963326188 > > Any idea? > That looks like the issue Juergen fixed with: https://lore.kernel.org/xen-devel/20260220123715.834848-1-jgross@xxxxxxxx/ ~Andrew
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