cve-2021-47549
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-11-04 12:08
Severity ?
EPSS score ?
Summary
sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
References
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl\n\nWhen the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux,\na bug is reported:\n ==================================================================\n BUG: Unable to handle kernel data access on read at 0x80000800805b502c\n Oops: Kernel access of bad area, sig: 11 [#1]\n NIP [c0000000000388a4] .ioread32+0x4/0x20\n LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl]\n Call Trace:\n .free_irq+0x1c/0x4e0 (unreliable)\n .ata_host_stop+0x74/0xd0 [libata]\n .release_nodes+0x330/0x3f0\n .device_release_driver_internal+0x178/0x2c0\n .driver_detach+0x64/0xd0\n .bus_remove_driver+0x70/0xf0\n .driver_unregister+0x38/0x80\n .platform_driver_unregister+0x14/0x30\n .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]\n .__se_sys_delete_module+0x1ec/0x2d0\n .system_call_exception+0xfc/0x1f0\n system_call_common+0xf8/0x200\n ==================================================================\n\nThe triggering of the BUG is shown in the following stack:\n\ndriver_detach\n device_release_driver_internal\n __device_release_driver\n drv-\u003eremove(dev) --\u003e platform_drv_remove/platform_remove\n drv-\u003eremove(dev) --\u003e sata_fsl_remove\n iounmap(host_priv-\u003ehcr_base);\t\t\t\u003c---- unmap\n kfree(host_priv); \u003c---- free\n devres_release_all\n release_nodes\n dr-\u003enode.release(dev, dr-\u003edata) --\u003e ata_host_stop\n ap-\u003eops-\u003eport_stop(ap) --\u003e sata_fsl_port_stop\n ioread32(hcr_base + HCONTROL) \u003c---- UAF\n host-\u003eops-\u003ehost_stop(host)\n\nThe iounmap(host_priv-\u003ehcr_base) and kfree(host_priv) functions should\nnot be executed in drv-\u003eremove. These functions should be executed in\nhost_stop after port_stop. Therefore, we move these functions to the\nnew function sata_fsl_host_stop and bind the new function to host_stop."
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"cveId": "CVE-2021-47549",
"datePublished": "2024-05-24T15:09:53.292Z",
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"dateUpdated": "2024-11-04T12:08:02.803Z",
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"nvd": "{\"cve\":{\"id\":\"CVE-2021-47549\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:19.773\",\"lastModified\":\"2024-05-24T18:09:20.027\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl\\n\\nWhen the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux,\\na bug is reported:\\n ==================================================================\\n BUG: Unable to handle kernel data access on read at 0x80000800805b502c\\n Oops: Kernel access of bad area, sig: 11 [#1]\\n NIP [c0000000000388a4] .ioread32+0x4/0x20\\n LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl]\\n Call Trace:\\n .free_irq+0x1c/0x4e0 (unreliable)\\n .ata_host_stop+0x74/0xd0 [libata]\\n .release_nodes+0x330/0x3f0\\n .device_release_driver_internal+0x178/0x2c0\\n .driver_detach+0x64/0xd0\\n .bus_remove_driver+0x70/0xf0\\n .driver_unregister+0x38/0x80\\n .platform_driver_unregister+0x14/0x30\\n .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]\\n .__se_sys_delete_module+0x1ec/0x2d0\\n .system_call_exception+0xfc/0x1f0\\n system_call_common+0xf8/0x200\\n ==================================================================\\n\\nThe triggering of the BUG is shown in the following stack:\\n\\ndriver_detach\\n device_release_driver_internal\\n __device_release_driver\\n drv-\u003eremove(dev) --\u003e platform_drv_remove/platform_remove\\n drv-\u003eremove(dev) --\u003e sata_fsl_remove\\n iounmap(host_priv-\u003ehcr_base);\\t\\t\\t\u003c---- unmap\\n kfree(host_priv); \u003c---- free\\n devres_release_all\\n release_nodes\\n dr-\u003enode.release(dev, dr-\u003edata) --\u003e ata_host_stop\\n ap-\u003eops-\u003eport_stop(ap) --\u003e sata_fsl_port_stop\\n ioread32(hcr_base + HCONTROL) \u003c---- UAF\\n host-\u003eops-\u003ehost_stop(host)\\n\\nThe iounmap(host_priv-\u003ehcr_base) and kfree(host_priv) functions should\\nnot be executed in drv-\u003eremove. These functions should be executed in\\nhost_stop after port_stop. Therefore, we move these functions to the\\nnew function sata_fsl_host_stop and bind the new function to host_stop.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sata_fsl: corrige UAF en sata_fsl_port_stop cuando rmmod sata_fsl Cuando se ejecuta el comando `rmmod sata_fsl.ko` en el PPC64 GNU/Linux se reporta un error: ====== ==================================================== ========== ERROR: No se puede manejar el acceso a los datos del kernel al leer en 0x80000800805b502c Ups: Acceso al kernel del \u00e1rea defectuosa, firma: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034 ] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Seguimiento de llamadas: .free_irq+0x1c/0x4e0 (no confiable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0. driver_detach+0x64/0xd0 . bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+ 0xfc/0x1f0 system_call_common+0xf8/0x200 ======= ==================================================== ========= La activaci\u00f3n del ERROR se muestra en la siguiente pila: driver_detach device_release_driver_internal __device_release_driver drv-\u0026gt;remove(dev) --\u0026gt; platform_drv_remove/platform_remove drv-\u0026gt;remove(dev) --\u0026gt; sata_fsl_remove iounmap( host_priv-\u0026gt;hcr_base); \u0026lt;---- desasignar kfree(host_priv); \u0026lt;---- free devres_release_all release_nodes dr-\u0026gt;node.release(dev, dr-\u0026gt;data) --\u0026gt; ata_host_stop ap-\u0026gt;ops-\u0026gt;port_stop(ap) --\u0026gt; sata_fsl_port_stop ioread32(hcr_base + HCONTROL) \u0026lt;--- - UAF host-\u0026gt;ops-\u0026gt;host_stop(host) Las funciones iounmap(host_priv-\u0026gt;hcr_base) y kfree(host_priv) no deben ejecutarse en drv-\u0026gt;remove. Estas funciones deben ejecutarse en host_stop despu\u00e9s de port_stop. Por lo tanto, movemos estas funciones a la nueva funci\u00f3n sata_fsl_host_stop y vinculamos la nueva funci\u00f3n a host_stop.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}
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