CVE-2024-26893
Vulnerability from cvelistv5
Published
2024-04-17 10:27
Modified
2024-12-19 08:49
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix double free in SMC transport cleanup path When the generic SCMI code tears down a channel, it calls the chan_free callback function, defined by each transport. Since multiple protocols might share the same transport_info member, chan_free() might want to clean up the same member multiple times within the given SCMI transport implementation. In this case, it is SMC transport. This will lead to a NULL pointer dereference at the second time: | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16 | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled. | arm-scmi firmware:scmi: unable to communicate with SCMI | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | Mem abort info: | ESR = 0x0000000096000004 | EC = 0x25: DABT (current EL), IL = 32 bits | SET = 0, FnV = 0 | EA = 0, S1PTW = 0 | FSC = 0x04: level 0 translation fault | Data abort info: | ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 | CM = 0, WnR = 0, TnD = 0, TagAccess = 0 | GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000 | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP | Modules linked in: | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793 | Hardware name: FVP Base RevC (DT) | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) | pc : smc_chan_free+0x3c/0x6c | lr : smc_chan_free+0x3c/0x6c | Call trace: | smc_chan_free+0x3c/0x6c | idr_for_each+0x68/0xf8 | scmi_cleanup_channels.isra.0+0x2c/0x58 | scmi_probe+0x434/0x734 | platform_probe+0x68/0xd8 | really_probe+0x110/0x27c | __driver_probe_device+0x78/0x12c | driver_probe_device+0x3c/0x118 | __driver_attach+0x74/0x128 | bus_for_each_dev+0x78/0xe0 | driver_attach+0x24/0x30 | bus_add_driver+0xe4/0x1e8 | driver_register+0x60/0x128 | __platform_driver_register+0x28/0x34 | scmi_driver_init+0x84/0xc0 | do_one_initcall+0x78/0x33c | kernel_init_freeable+0x2b8/0x51c | kernel_init+0x24/0x130 | ret_from_fork+0x10/0x20 | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280) | ---[ end trace 0000000000000000 ]--- Simply check for the struct pointer being NULL before trying to access its members, to avoid this situation. This was found when a transport doesn't really work (for instance no SMC service), the probe routines then tries to clean up, and triggers a crash.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd
Impacted products
Vendor Product Version
Linux Linux Version: 5.8
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix double free in SMC transport cleanup path\n\nWhen the generic SCMI code tears down a channel, it calls the chan_free\ncallback function, defined by each transport. Since multiple protocols\nmight share the same transport_info member, chan_free() might want to\nclean up the same member multiple times within the given SCMI transport\nimplementation. In this case, it is SMC transport. This will lead to a NULL\npointer dereference at the second time:\n\n    | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16\n    | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled.\n    | arm-scmi firmware:scmi: unable to communicate with SCMI\n    | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n    | Mem abort info:\n    |   ESR = 0x0000000096000004\n    |   EC = 0x25: DABT (current EL), IL = 32 bits\n    |   SET = 0, FnV = 0\n    |   EA = 0, S1PTW = 0\n    |   FSC = 0x04: level 0 translation fault\n    | Data abort info:\n    |   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\n    |   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n    |   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n    | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000\n    | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\n    | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP\n    | Modules linked in:\n    | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793\n    | Hardware name: FVP Base RevC (DT)\n    | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n    | pc : smc_chan_free+0x3c/0x6c\n    | lr : smc_chan_free+0x3c/0x6c\n    | Call trace:\n    |  smc_chan_free+0x3c/0x6c\n    |  idr_for_each+0x68/0xf8\n    |  scmi_cleanup_channels.isra.0+0x2c/0x58\n    |  scmi_probe+0x434/0x734\n    |  platform_probe+0x68/0xd8\n    |  really_probe+0x110/0x27c\n    |  __driver_probe_device+0x78/0x12c\n    |  driver_probe_device+0x3c/0x118\n    |  __driver_attach+0x74/0x128\n    |  bus_for_each_dev+0x78/0xe0\n    |  driver_attach+0x24/0x30\n    |  bus_add_driver+0xe4/0x1e8\n    |  driver_register+0x60/0x128\n    |  __platform_driver_register+0x28/0x34\n    |  scmi_driver_init+0x84/0xc0\n    |  do_one_initcall+0x78/0x33c\n    |  kernel_init_freeable+0x2b8/0x51c\n    |  kernel_init+0x24/0x130\n    |  ret_from_fork+0x10/0x20\n    | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280)\n    | ---[ end trace 0000000000000000 ]---\n\nSimply check for the struct pointer being NULL before trying to access\nits members, to avoid this situation.\n\nThis was found when a transport doesn\u0027t really work (for instance no SMC\nservice), the probe routines then tries to clean up, and triggers a crash."
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    "cveId": "CVE-2024-26893",
    "datePublished": "2024-04-17T10:27:45.332Z",
    "dateReserved": "2024-02-19T14:20:24.186Z",
    "dateUpdated": "2024-12-19T08:49:39.052Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26893\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:10.577\",\"lastModified\":\"2024-11-21T09:03:19.143\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfirmware: arm_scmi: Fix double free in SMC transport cleanup path\\n\\nWhen the generic SCMI code tears down a channel, it calls the chan_free\\ncallback function, defined by each transport. Since multiple protocols\\nmight share the same transport_info member, chan_free() might want to\\nclean up the same member multiple times within the given SCMI transport\\nimplementation. In this case, it is SMC transport. This will lead to a NULL\\npointer dereference at the second time:\\n\\n    | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16\\n    | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled.\\n    | arm-scmi firmware:scmi: unable to communicate with SCMI\\n    | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\\n    | Mem abort info:\\n    |   ESR = 0x0000000096000004\\n    |   EC = 0x25: DABT (current EL), IL = 32 bits\\n    |   SET = 0, FnV = 0\\n    |   EA = 0, S1PTW = 0\\n    |   FSC = 0x04: level 0 translation fault\\n    | Data abort info:\\n    |   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\\n    |   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\\n    |   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\\n    | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000\\n    | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\\n    | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP\\n    | Modules linked in:\\n    | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793\\n    | Hardware name: FVP Base RevC (DT)\\n    | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\\n    | pc : smc_chan_free+0x3c/0x6c\\n    | lr : smc_chan_free+0x3c/0x6c\\n    | Call trace:\\n    |  smc_chan_free+0x3c/0x6c\\n    |  idr_for_each+0x68/0xf8\\n    |  scmi_cleanup_channels.isra.0+0x2c/0x58\\n    |  scmi_probe+0x434/0x734\\n    |  platform_probe+0x68/0xd8\\n    |  really_probe+0x110/0x27c\\n    |  __driver_probe_device+0x78/0x12c\\n    |  driver_probe_device+0x3c/0x118\\n    |  __driver_attach+0x74/0x128\\n    |  bus_for_each_dev+0x78/0xe0\\n    |  driver_attach+0x24/0x30\\n    |  bus_add_driver+0xe4/0x1e8\\n    |  driver_register+0x60/0x128\\n    |  __platform_driver_register+0x28/0x34\\n    |  scmi_driver_init+0x84/0xc0\\n    |  do_one_initcall+0x78/0x33c\\n    |  kernel_init_freeable+0x2b8/0x51c\\n    |  kernel_init+0x24/0x130\\n    |  ret_from_fork+0x10/0x20\\n    | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280)\\n    | ---[ end trace 0000000000000000 ]---\\n\\nSimply check for the struct pointer being NULL before trying to access\\nits members, to avoid this situation.\\n\\nThis was found when a transport doesn\u0027t really work (for instance no SMC\\nservice), the probe routines then tries to clean up, and triggers a crash.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: firmware: arm_scmi: Correcci\u00f3n de doble liberaci\u00f3n en la ruta de limpieza del transporte SMC Cuando el c\u00f3digo SCMI gen\u00e9rico destruye un canal, llama a la funci\u00f3n de devoluci\u00f3n de llamada chan_free, definida por cada transporte. Dado que varios protocolos pueden compartir el mismo miembro transport_info, es posible que chan_free() desee limpiar el mismo miembro varias veces dentro de la implementaci\u00f3n de transporte SCMI determinada. En este caso se trata de transporte SMC. Esto dar\u00e1 lugar a una desreferencia del puntero NULL la segunda vez: | scmi_protocol scmi_dev.1: Canal TX en modo de sondeo habilitado - prot_id:16 | firmware arm-scmi: scmi: Notificaciones SCMI: n\u00facleo habilitado. | firmware arm-scmi: scmi: no se puede comunicar con SCMI | No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 | Informaci\u00f3n de cancelaci\u00f3n de memoria: | ESR = 0x0000000096000004 | EC = 0x25: DABT (EL actual), IL = 32 bits | CONJUNTO = 0, FnV = 0 | EA = 0, S1PTW = 0 | FSC = 0x04: error de traducci\u00f3n de nivel 0 | Informaci\u00f3n de cancelaci\u00f3n de datos: | ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 | CM = 0, WnR = 0, TnD = 0, Acceso a etiquetas = 0 | GCS = 0, Superposici\u00f3n = 0, DirtyBit = 0, Xs = 0 | pgtable de usuario: p\u00e1ginas de 4k, VA de 48 bits, pgdp=0000000881ef8000 | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 | Error interno: Ups: 0000000096000004 [#1] SMP ANTICIPADO | M\u00f3dulos enlazados en: | CPU: 4 PID: 1 Comunicaciones: swapper/0 No contaminado 6.7.0-rc2-00124-g455ef3d016c9-dirty #793 | Nombre del hardware: FVP Base RevC (DT) | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) | ordenador personal: smc_chan_free+0x3c/0x6c | lr: smc_chan_free+0x3c/0x6c | Rastreo de llamadas: | smc_chan_free+0x3c/0x6c | idr_for_each+0x68/0xf8 | scmi_cleanup_channels.isra.0+0x2c/0x58 | scmi_probe+0x434/0x734 | sonda_plataforma+0x68/0xd8 | realmente_probe+0x110/0x27c | __driver_probe_device+0x78/0x12c | dispositivo_sonda_controlador+0x3c/0x118 | __driver_attach+0x74/0x128 | bus_for_each_dev+0x78/0xe0 | driver_attach+0x24/0x30 | bus_add_driver+0xe4/0x1e8 | registro_controlador+0x60/0x128 | __platform_driver_register+0x28/0x34 | scmi_driver_init+0x84/0xc0 | do_one_initcall+0x78/0x33c | kernel_init_freeable+0x2b8/0x51c | kernel_init+0x24/0x130 | ret_from_fork+0x10/0x20 | C\u00f3digo: f0004701 910a0021 aa1403e5 97b91c70 (b9400280) | ---[ end trace 0000000000000000 ]--- Simplemente verifique que el puntero de estructura sea NULL antes de intentar acceder a sus miembros, para evitar esta situaci\u00f3n. Esto se encontr\u00f3 cuando un transporte realmente no funciona (por ejemplo, sin servicio SMC), las rutinas de la sonda intentan limpiarse y provocan un bloqueo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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