CVE-2024-39462

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") anotó el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los límites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los límites. Como se señaló en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habrá una advertencia de cada acceso antes de la inicialización porque la cantidad de elementos es cero. Esto ocurre en clk_dvp_probe() debido a que ->num se asigna después de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 El índice 0 está fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (también conocido como 'struct clk_hw *[]'). Mueva la inicialización ->num antes del primer acceso de ->hws, lo que borra la advertencia. .

In the Linux kernel, the following vulnerability has been resolved: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer about the number of elements in hws, so that it can warn when hws is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in clk_dvp_probe() due to ->num being assigned after ->hws has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 index 0 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]') Move the ->num initialization to before the first access of ->hws, which clears up the warning.

Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service.