CVE-2023-52456
Vulnerability from cvelistv5
Published
2024-02-23 14:46
Modified
2024-11-04 14:47
Severity ?
Summary
serial: imx: fix tx statemachine deadlock
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfdaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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    "dateReserved": "2024-02-20T12:30:33.294Z",
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The statemachine is in\\ndeadlock now, and the TX_EN remains low, making the interface useless.\\n\\nimx_uart_stop_tx now checks for incomplete transmission AND whether TC\\ninterrupts are enabled before bailing to be retriggered. This makes sure\\nthe state machine handling is reached, and is properly set to\\nWAIT_AFTER_SEND.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: imx: corrige el punto muerto de la m\u00e1quina de estado tx Cuando se usa el puerto serie como puerto RS485, la m\u00e1quina de estado tx se usa para controlar el pin RTS para controlar el pin TX_EN del transceptor RS485. Cuando el puerto TTY se cierra en medio de una transmisi\u00f3n (por ejemplo, durante una falla de la aplicaci\u00f3n en el \u00e1rea de usuario), imx_uart_shutdown deshabilita la interfaz y deshabilita la interrupci\u00f3n de transmisi\u00f3n completa. Despu\u00e9s de eso, imx_uart_stop_tx abandona una transmisi\u00f3n incompleta, para ser reactivada por la interrupci\u00f3n de TC. Esta interrupci\u00f3n est\u00e1 deshabilitada y, por lo tanto, la m\u00e1quina de estados tx nunca sale de ENVIAR. La m\u00e1quina de estados ahora est\u00e1 en punto muerto y TX_EN permanece bajo, lo que hace que la interfaz sea in\u00fatil. imx_uart_stop_tx ahora verifica si hay transmisiones incompletas Y si las interrupciones TC est\u00e1n habilitadas antes de volver a activar el rescate. 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}


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