"value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfgraph: Add READ_ONCE() when accessing fgraph_array[]\n\nIn __ftrace_return_to_handler(), a loop iterates over the fgraph_array[]\nelements, which are fgraph_ops. The loop checks if an element is a\nfgraph_stub to prevent using a fgraph_stub afterward.\n\nHowever, if the compiler reloads fgraph_array[] after this check, it might\nrace with an update to fgraph_array[] that introduces a fgraph_stub. This\ncould result in the stub being processed, but the stub contains a null\n\"func_hash\" field, leading to a NULL pointer dereference.\n\nTo ensure that the gops compared against the fgraph_stub matches the gops\nprocessed later, add a READ_ONCE(). A similar patch appears in commit\n63a8dfb (\"function_graph: Add READ_ONCE() when accessing fgraph_array[]\")."
"value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fgraph: Agregar READ_ONCE() al acceder a fgraph_array[] En __ftrace_return_to_handler(), un bucle itera sobre los elementos fgraph_array[], que son fgraph_ops. El bucle comprueba si un elemento es un fgraph_stub para evitar usar un fgraph_stub despu\u00e9s. Sin embargo, si el compilador vuelve a cargar fgraph_array[] despu\u00e9s de esta comprobaci\u00f3n, podr\u00eda competir con una actualizaci\u00f3n a fgraph_array[] que introduce un fgraph_stub. Esto podr\u00eda dar como resultado que se procese el stub, pero que este contenga un campo \"func_hash\" nulo, lo que lleva a una desreferencia de puntero NULL. Para garantizar que los gops comparados con fgraph_stub coincidan con los gops procesados ??m\u00e1s tarde, agregue un READ_ONCE(). Un parche similar aparece en el commit 63a8dfb (\"function_graph: Agregar READ_ONCE() al acceder a fgraph_array[]\")."
