cve-2021-46959
Vulnerability from cvelistv5
Published
2024-02-29 22:31
Modified
2024-11-04 11:56
Severity ?
Summary
spi: Fix use-after-free with devm_spi_alloc_*
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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    "cveId": "CVE-2021-46959",
    "datePublished": "2024-02-29T22:31:12.304Z",
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    "dateUpdated": "2024-11-04T11:56:40.464Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-46959\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T23:15:07.230\",\"lastModified\":\"2024-03-01T14:04:26.010\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nspi: Fix use-after-free with devm_spi_alloc_*\\n\\nWe can\u0027t rely on the contents of the devres list during\\nspi_unregister_controller(), as the list is already torn down at the\\ntime we perform devres_find() for devm_spi_release_controller. This\\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\\nmistakenly identified as legacy, non-devm managed devices and have their\\nreference counters decremented below 0.\\n\\n------------[ cut here ]------------\\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\\n[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\\n r4:b6700140\\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\\n r5:b6700180 r4:b6700100\\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\\n r5:b117ad94 r4:b163dc10\\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (unbind_store+0xe4/0xf8)\\n\\nInstead, determine the devm allocation state as a flag on the\\ncontroller which is guaranteed to be stable during cleanup.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: spi: corrige el Use-After-Free con devm_spi_alloc_* No podemos confiar en el contenido de la lista devres durante spi_unregister_controller(), ya que la lista ya est\u00e1 eliminada en ese momento. Realizamos devres_find() para devm_spi_release_controller. Esto hace que los dispositivos registrados con devm_spi_alloc_{master,slave}() se identifiquen err\u00f3neamente como dispositivos heredados, no administrados por devm y sus contadores de referencia disminuyan por debajo de 0. ------------[ cortar aqu\u00ed ] ------------ ADVERTENCIA: CPU: 1 PID: 660 en lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [] (refcount_warn_saturate) de [] (kobject_put+ 0x90/0x98) [] (kobject_put) de [] (put_device+0x20/0x24) r4:b6700140 [] (put_device) de [] (devm_spi_release_controller+0x3c/0x40 ) [ ] (devm_spi_release_controller) de [] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [] (release_nodes) de [] (devres_release_all+0x5c/0x6 0) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [] (devres_release_all) de [] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [] (__device_release_driver) de [\u0026lt; b044f70c\u0026gt;] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [] (device_driver_detach) de [ ] (unbind_store+0xe4/0xf8) en su lugar , determine el estado de asignaci\u00f3n devm como un indicador en el controlador que se garantiza que ser\u00e1 estable durante la limpieza.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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