mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
synced 2025-05-28 01:02:25 +00:00
57 lines
4.5 KiB
JSON
57 lines
4.5 KiB
JSON
{
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"id": "CVE-2022-49434",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2025-02-26T07:01:19.863",
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"lastModified": "2025-02-26T07:01:19.863",
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"vulnStatus": "Received",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store()\n\nThe sysfs sriov_numvfs_store() path acquires the device lock before the\nconfig space access lock:\n\n sriov_numvfs_store\n device_lock # A (1) acquire device lock\n sriov_configure\n vfio_pci_sriov_configure # (for example)\n vfio_pci_core_sriov_configure\n pci_disable_sriov\n sriov_disable\n pci_cfg_access_lock\n pci_wait_cfg # B (4) wait for dev->block_cfg_access == 0\n\nPreviously, pci_dev_lock() acquired the config space access lock before the\ndevice lock:\n\n pci_dev_lock\n pci_cfg_access_lock\n dev->block_cfg_access = 1 # B (2) set dev->block_cfg_access = 1\n device_lock # A (3) wait for device lock\n\nAny path that uses pci_dev_lock(), e.g., pci_reset_function(), may\ndeadlock with sriov_numvfs_store() if the operations occur in the sequence\n(1) (2) (3) (4).\n\nAvoid the deadlock by reversing the order in pci_dev_lock() so it acquires\nthe device lock before the config space access lock, the same as the\nsriov_numvfs_store() path.\n\n[bhelgaas: combined and adapted commit log from Jay Zhou's independent\nsubsequent posting:\nhttps://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]"
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: evitar el bloqueo AB/BA de pci_dev_lock() con sriov_numvfs_store() La ruta sysfs sriov_numvfs_store() adquiere el bloqueo del dispositivo antes del bloqueo de acceso al espacio de configuraci\u00f3n: sriov_numvfs_store device_lock # A (1) adquirir bloqueo del dispositivo sriov_configure vfio_pci_sriov_configure # (por ejemplo) vfio_pci_core_sriov_configure pci_disable_sriov sriov_disable pci_cfg_access_lock pci_wait_cfg # B (4) esperar a que dev->block_cfg_access == 0 Anteriormente, pci_dev_lock() adquir\u00eda el bloqueo de acceso al espacio de configuraci\u00f3n antes del bloqueo del dispositivo: pci_dev_lock pci_cfg_access_lock dev->block_cfg_access = 1 # B (2) set dev->block_cfg_access = 1 device_lock # A (3) esperar a que se bloquee el dispositivo Cualquier ruta que use pci_dev_lock(), p. ej., pci_reset_function(), puede bloquearse con sriov_numvfs_store() si las operaciones ocurren en la secuencia (1) (2) (3) (4). Evite el bloqueo invirtiendo el orden en pci_dev_lock() para que adquiera el bloqueo del dispositivo antes del bloqueo de acceso al espacio de configuraci\u00f3n, lo mismo que la ruta sriov_numvfs_store(). [bhelgaas: registro de confirmaci\u00f3n combinado y adaptado de la publicaci\u00f3n posterior independiente de Jay Zhou: https://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]"
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2cdd5284035322795b0964f899eefba254cfe483",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/59ea6b3ae51df7cd6bfd84c9c0030609b9315622",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/a91ee0e9fca9d7501286cfbced9b30a33e52740a",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/aed6d4d519210c28817948f34c53b6e058e0456c",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9a81f9ed6ae3554621d6a50220b1bc74b67d81e",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/da9792920ab525b8a932aa9aeee34529ad7b83f7",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/ea047f51172aa68841adef7f52d375002438b8f0",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/eff3587b9c01439b738298475e555c028ac9f55e",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |