From: no-reply@sashiko.virtuozzo.com
To: svt-core@virtuozzo.com,
Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Subject: Re: [PATCH QEMU HCI-8.1 02/21] hw/vfio: Fix liveness check in vfio_connect_kvm_msi_virq()
Date: Fri, 9 Oct 2026 15:09:40 +0000 [thread overview]
Message-ID: <010701a1213677f5-cf439a3d-cab9-40ed-bd89-4cbc95c93ad3-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261009-vfio_v1-v1-2-2ae91d5b8048@virtuozzo.com>
> From: "Tycho Andersen (AMD)" <tycho@kernel.org>
>
> While working on savevm/loadvm for a new vfio device, I encountered the
> crash below. Since vfio_connect_kvm_msi_virq() didn't check the ->use flag
> for the vector, it would pass an unused vector down to
> vfio_cpr_load_vector_fd() which would crash.
>
> Fix this by checking the ->use flag along with the virq number to detect
> whether a vector is valid or not.
>
> Thread 1 "qemu-system-x86" received signal SIGSEGV, Segmentation fault.
> 0x0000555555a891ef in vfio_cpr_load_vector_fd (vdev=vdev@entry=0x0,
> name=name@entry=0x555555eeb27e "kvm_interrupt", nr=nr@entry=1) at ../hw/vfio/cpr.c:44
> 44 g_autofree char *fdname = STRDUP_VECTOR_FD_NAME(vdev, name);
> (gdb) bt
> [ ... ]
> Fixes: 30edcb4d4e7a ("vfio-pci: preserve MSI")
> Signed-off-by: Tycho Andersen (AMD) <tycho@kernel.org>
> Reviewed-by: Cédric Le Goater <clg@redhat.com>
> Link: https://lore.kernel.org/qemu-devel/20260727150038.2684512-1-tycho@kernel.org
> Signed-off-by: Cédric Le Goater <clg@redhat.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261009-vfio_v1-v1-0-2ae91d5b8048@virtuozzo.com?part=2
next prev parent reply other threads:[~2026-10-09 15:09 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 14:55 [PATCH QEMU HCI-8.1 00/21] vfio: support qemu-update with passed through GPU's and vGPU's #VSTOR-103860 Andrey Drobyshev
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 01/21] migration: Plug memory leaks after migrate_set_error() Andrey Drobyshev
2026-10-09 15:09 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 02/21] hw/vfio: Fix liveness check in vfio_connect_kvm_msi_virq() Andrey Drobyshev
2026-10-09 15:09 ` no-reply [this message]
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 03/21] vfio/pci: Reject invalid MSI-X Table and PBA BIR values Andrey Drobyshev
2026-10-09 15:10 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 04/21] vfio/pci: Fix information leak in vfio_rom_read() Andrey Drobyshev
2026-10-09 15:10 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 05/21] vfio/pci: Initialize rom_read_failed in vfio_pci_load_rom() Andrey Drobyshev
2026-10-09 15:13 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 06/21] vfio/pci: Grow buffer in vfio_pci_host_match() Andrey Drobyshev
2026-10-09 15:10 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 07/21] q35: Fix migration of SMRAM state Andrey Drobyshev
2026-10-09 15:12 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 08/21] migration: ensure APIC is loaded prior to VFIO PCI devices Andrey Drobyshev
2026-10-09 15:13 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 09/21] migration: Fix regression of passing error_fatal into vmstate_load_state() Andrey Drobyshev
2026-10-09 15:17 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 10/21] migration: yank: Move register instance earlier Andrey Drobyshev
2026-10-09 15:16 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 11/21] migration: Free cpr-transfer MigrationAddress along with gsource Andrey Drobyshev
2026-10-09 15:17 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 12/21] migration: Move CPR HUP watch to cpr-transfer.c Andrey Drobyshev
2026-10-09 15:18 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 13/21] migration: Fix crash on second migration when cancel early Andrey Drobyshev
2026-10-09 15:20 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 14/21] kvm: tolerate ioctls after kvm_close() Andrey Drobyshev
2026-10-09 15:22 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 15/21] kvm: fix coalesced MMIO flush racing with kvm_close() Andrey Drobyshev
2026-10-09 15:22 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 16/21] vfio/migration: don't migrate device state during CPR Andrey Drobyshev
2026-10-09 15:29 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 17/21] vfio/listener: skip dirty page tracking " Andrey Drobyshev
2026-10-09 15:27 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 18/21] VZ: physmem: align fd-backed RAM like anonymous RAM #VSTOR-103860 Andrey Drobyshev
2026-10-09 15:31 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 19/21] VZ: migration/cpr-exec: abort cpr-exec if memory can't be preserved Andrey Drobyshev
2026-10-09 15:31 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 20/21] VZ: vfio/region: preserve BAR mappings across cpr-exec #VSTOR-103860 Andrey Drobyshev
2026-10-09 15:36 ` no-reply
2026-10-09 14:56 ` [PATCH QEMU HCI-8.1 21/21] VZ: migration/cpr-exec: allow cpr-exec with VFIO devices #VSTOR-103860 Andrey Drobyshev
2026-10-09 15:34 ` no-reply
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