From: Suresh Udipi <sudipi@xxxxxxxxxxxxxx> commit af708900e9a48c0aa46070c8a8cdf0608a1d2025 upstream. It looks like v4.18-rc1 commit [0] which upstreams mld-1.8.0 commit [1] missed to fix the memory leak in mod_exit function. Do it now. [0] aba258b7310167 ("staging: most: cdev: fix chrdev_region leak") [1] https://github.com/microchip-ais/linux/commit/a2d8f7ae7ea381 ("staging: most: cdev: fix leak for chrdev_region") Signed-off-by: Suresh Udipi <sudipi@xxxxxxxxxxxxxx> Signed-off-by: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> Acked-by: Christian Gromm <christian.gromm@xxxxxxxxxxxxx> Fixes: aba258b73101 ("staging: most: cdev: fix chrdev_region leak") Cc: stable <stable@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/staging/most/cdev/cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/most/cdev/cdev.c +++ b/drivers/staging/most/cdev/cdev.c @@ -546,7 +546,7 @@ static void __exit mod_exit(void) destroy_cdev(c); destroy_channel(c); } - unregister_chrdev_region(comp.devno, 1); + unregister_chrdev_region(comp.devno, CHRDEV_REGION_SIZE); ida_destroy(&comp.minor_id); class_destroy(comp.class); }