{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2022-48818", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-16T11:38:08.900Z", "datePublished": "2024-07-16T11:44:05.957Z", "dateUpdated": "2024-09-11T17:34:12.506Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-07-16T11:44:05.957Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mv88e6xxx: don't use devres for mdiobus\n\nAs explained in commits:\n74b6d7d13307 (\"net: dsa: realtek: register the MDIO bus under devres\")\n5135e96a3dd2 (\"net: dsa: don't allocate the slave_mii_bus using devres\")\n\nmdiobus_free() will panic when called from devm_mdiobus_free() <-\ndevres_release_all() <- __device_release_driver(), and that mdiobus was\nnot previously unregistered.\n\nThe mv88e6xxx is an MDIO device, so the initial set of constraints that\nI thought would cause this (I2C or SPI buses which call ->remove on\n->shutdown) do not apply. But there is one more which applies here.\n\nIf the DSA master itself is on a bus that calls ->remove from ->shutdown\n(like dpaa2-eth, which is on the fsl-mc bus), there is a device link\nbetween the switch and the DSA master, and device_links_unbind_consumers()\nwill unbind the Marvell switch driver on shutdown.\n\nsystemd-shutdown[1]: Powering off.\nmv88e6085 0x0000000008b96000:00 sw_gl0: Link is Down\nfsl-mc dpbp.9: Removing from iommu group 7\nfsl-mc dpbp.8: Removing from iommu group 7\n------------[ cut here ]------------\nkernel BUG at drivers/net/phy/mdio_bus.c:677!\nInternal error: Oops - BUG: 0 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.16.5-00040-gdc05f73788e5 #15\npc : mdiobus_free+0x44/0x50\nlr : devm_mdiobus_free+0x10/0x20\nCall trace:\n mdiobus_free+0x44/0x50\n devm_mdiobus_free+0x10/0x20\n devres_release_all+0xa0/0x100\n __device_release_driver+0x190/0x220\n device_release_driver_internal+0xac/0xb0\n device_links_unbind_consumers+0xd4/0x100\n __device_release_driver+0x4c/0x220\n device_release_driver_internal+0xac/0xb0\n device_links_unbind_consumers+0xd4/0x100\n __device_release_driver+0x94/0x220\n device_release_driver+0x28/0x40\n bus_remove_device+0x118/0x124\n device_del+0x174/0x420\n fsl_mc_device_remove+0x24/0x40\n __fsl_mc_device_remove+0xc/0x20\n device_for_each_child+0x58/0xa0\n dprc_remove+0x90/0xb0\n fsl_mc_driver_remove+0x20/0x5c\n __device_release_driver+0x21c/0x220\n device_release_driver+0x28/0x40\n bus_remove_device+0x118/0x124\n device_del+0x174/0x420\n fsl_mc_bus_remove+0x80/0x100\n fsl_mc_bus_shutdown+0xc/0x1c\n platform_shutdown+0x20/0x30\n device_shutdown+0x154/0x330\n kernel_power_off+0x34/0x6c\n __do_sys_reboot+0x15c/0x250\n __arm64_sys_reboot+0x20/0x30\n invoke_syscall.constprop.0+0x4c/0xe0\n do_el0_svc+0x4c/0x150\n el0_svc+0x24/0xb0\n el0t_64_sync_handler+0xa8/0xb0\n el0t_64_sync+0x178/0x17c\n\nSo the same treatment must be applied to all DSA switch drivers, which\nis: either use devres for both the mdiobus allocation and registration,\nor don't use devres at all.\n\nThe Marvell driver already has a good structure for mdiobus removal, so\njust plug in mdiobus_free and get rid of devres." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/dsa/mv88e6xxx/chip.c" ], "versions": [ { "version": "ac3a68d56651", "lessThan": "8ccebe77df6e", "status": "affected", "versionType": "git" }, { "version": "ac3a68d56651", "lessThan": "8b626d45127d", "status": "affected", "versionType": "git" }, { "version": "ac3a68d56651", "lessThan": "1b451c3994a2", "status": "affected", "versionType": "git" }, { "version": "ac3a68d56651", "lessThan": "f53a2ce893b2", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/dsa/mv88e6xxx/chip.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.101", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.24", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16.10", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8ccebe77df6e0d88c72ba5e69cf1835927e53b6c" }, { "url": "https://git.kernel.org/stable/c/8b626d45127d6f5ada7d815b83cfdc09e8cb1394" }, { "url": "https://git.kernel.org/stable/c/1b451c3994a2d322f8e55032c62c8b47b7d95900" }, { "url": "https://git.kernel.org/stable/c/f53a2ce893b2c7884ef94471f170839170a4eba0" } ], "title": "net: dsa: mv88e6xxx: don't use devres for mdiobus", "x_generator": { "engine": "bippy-c9c4e1df01b2" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.623Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/8ccebe77df6e0d88c72ba5e69cf1835927e53b6c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8b626d45127d6f5ada7d815b83cfdc09e8cb1394", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1b451c3994a2d322f8e55032c62c8b47b7d95900", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f53a2ce893b2c7884ef94471f170839170a4eba0", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48818", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:58:09.054337Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:12.506Z" } } ] } }