FKIE_CVE-2024-35824

Vulnerability from fkie_nvd - Published: 2024-05-17 14:15 - Updated: 2025-09-26 16:23
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: lis3lv02d_i2c: Fix regulators getting en-/dis-abled twice on suspend/resume When not configured for wakeup lis3lv02d_i2c_suspend() will call lis3lv02d_poweroff() even if the device has already been turned off by the runtime-suspend handler and if configured for wakeup and the device is runtime-suspended at this point then it is not turned back on to serve as a wakeup source. Before commit b1b9f7a49440 ("misc: lis3lv02d_i2c: Add missing setting of the reg_ctrl callback"), lis3lv02d_poweroff() failed to disable the regulators which as a side effect made calling poweroff() twice ok. Now that poweroff() correctly disables the regulators, doing this twice triggers a WARN() in the regulator core: unbalanced disables for regulator-dummy WARNING: CPU: 1 PID: 92 at drivers/regulator/core.c:2999 _regulator_disable ... Fix lis3lv02d_i2c_suspend() to not call poweroff() a second time if already runtime-suspended and add a poweron() call when necessary to make wakeup work. lis3lv02d_i2c_resume() has similar issues, with an added weirness that it always powers on the device if it is runtime suspended, after which the first runtime-resume will call poweron() again, causing the enabled count for the regulator to increase by 1 every suspend/resume. These unbalanced regulator_enable() calls cause the regulator to never be turned off and trigger the following WARN() on driver unbind: WARNING: CPU: 1 PID: 1724 at drivers/regulator/core.c:2396 _regulator_put Fix this by making lis3lv02d_i2c_resume() mirror the new suspend().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4154e767354140db7804207117e7238fb337b0e7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/997ca415384612c8df76d99d9a768e0b3f42b325Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac3e0384073b2408d6cb0d972fee9fcc3776053dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6df761182fc953907b18aba5049fc2a044ecb45Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4154e767354140db7804207117e7238fb337b0e7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/997ca415384612c8df76d99d9a768e0b3f42b325Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ac3e0384073b2408d6cb0d972fee9fcc3776053dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f6df761182fc953907b18aba5049fc2a044ecb45Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
To clipboard 

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: lis3lv02d_i2c: Fix regulators getting en-/dis-abled twice on suspend/resume\n\nWhen not configured for wakeup lis3lv02d_i2c_suspend() will call\nlis3lv02d_poweroff() even if the device has already been turned off\nby the runtime-suspend handler and if configured for wakeup and\nthe device is runtime-suspended at this point then it is not turned\nback on to serve as a wakeup source.\n\nBefore commit b1b9f7a49440 (\"misc: lis3lv02d_i2c: Add missing setting\nof the reg_ctrl callback\"), lis3lv02d_poweroff() failed to disable\nthe regulators which as a side effect made calling poweroff() twice ok.\n\nNow that poweroff() correctly disables the regulators, doing this twice\ntriggers a WARN() in the regulator core:\n\nunbalanced disables for regulator-dummy\nWARNING: CPU: 1 PID: 92 at drivers/regulator/core.c:2999 _regulator_disable\n...\n\nFix lis3lv02d_i2c_suspend() to not call poweroff() a second time if\nalready runtime-suspended and add a poweron() call when necessary to\nmake wakeup work.\n\nlis3lv02d_i2c_resume() has similar issues, with an added weirness that\nit always powers on the device if it is runtime suspended, after which\nthe first runtime-resume will call poweron() again, causing the enabled\ncount for the regulator to increase by 1 every suspend/resume. These\nunbalanced regulator_enable() calls cause the regulator to never\nbe turned off and trigger the following WARN() on driver unbind:\n\nWARNING: CPU: 1 PID: 1724 at drivers/regulator/core.c:2396 _regulator_put\n\nFix this by making lis3lv02d_i2c_resume() mirror the new suspend()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc: lis3lv02d_i2c: corrige que los reguladores se activen/desactiven dos veces al suspender/reanudar Cuando no est\u00e1 configurado para reactivaci\u00f3n, lis3lv02d_i2c_suspend() llamar\u00e1 a lis3lv02d_poweroff() incluso si el dispositivo ya ha sido desactivado por el controlador de suspensi\u00f3n de tiempo de ejecuci\u00f3n y si est\u00e1 configurado para reactivaci\u00f3n y el dispositivo est\u00e1 suspendido en tiempo de ejecuci\u00f3n en este punto, no se vuelve a activar para que sirva como fuente de activaci\u00f3n. Antes de la confirmaci\u00f3n b1b9f7a49440 (\"misc: lis3lv02d_i2c: Agregar configuraci\u00f3n faltante de la devoluci\u00f3n de llamada reg_ctrl\"), lis3lv02d_poweroff() fallaba al deshabilitar los reguladores, lo que como efecto secundario hizo que llamar a poweroff() dos veces fuera correcto. Ahora que poweroff() desactiva correctamente los reguladores, al hacer esto dos veces se activa una ADVERTENCIA() en el n\u00facleo del regulador: desactivaciones desequilibradas para regulador ficticio ADVERTENCIA: CPU: 1 PID: 92 en drivers/regulator/core.c:2999 _regulator_disable .. Corrija lis3lv02d_i2c_suspend() para que no llame a poweroff() una segunda vez si ya est\u00e1 suspendido el tiempo de ejecuci\u00f3n y agregue una llamada a poweron() cuando sea necesario para que la reactivaci\u00f3n funcione. lis3lv02d_i2c_resume() tiene problemas similares, con el inconveniente adicional de que siempre enciende el dispositivo si el tiempo de ejecuci\u00f3n est\u00e1 suspendido, despu\u00e9s de lo cual la primera reanudaci\u00f3n del tiempo de ejecuci\u00f3n llamar\u00e1 a poweron() nuevamente, lo que provocar\u00e1 que el recuento habilitado para el regulador aumente en 1 cada suspender/reanudar. Estas llamadas desequilibradas regulator_enable() hacen que el regulador nunca se apague y activan la siguiente ADVERTENCIA() al desvincular el controlador: ADVERTENCIA: CPU: 1 PID: 1724 en drivers/regulator/core.c:2396 _regulator_put Solucione esto haciendo lis3lv02d_i2c_resume( ) refleja la nueva suspensi\u00f3n()."
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  "id": "CVE-2024-35824",
  "lastModified": "2025-09-26T16:23:26.023",
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          "confidentialityImpact": "NONE",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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