_scif_init() free scif_dev in the free_sdev erro path, but _scif_exit will free it again when module exit, it cause BUG_ON issue,
kernel BUG at mm/slub.c:3944! invalid opcode: 0000 [#1] SMP KASAN PTI Set scif_dev to NULL in scif_destroy_scifdev() to fix it. Cc: Sudeep Dutt <[email protected]> Cc: Ashutosh Dixit <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Reported-by: Hulk Robot <[email protected]> Signed-off-by: Kefeng Wang <[email protected]> --- drivers/misc/mic/scif/scif_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/mic/scif/scif_main.c b/drivers/misc/mic/scif/scif_main.c index 36d847af1209..7f9ce0fe1e24 100644 --- a/drivers/misc/mic/scif/scif_main.c +++ b/drivers/misc/mic/scif/scif_main.c @@ -142,6 +142,7 @@ static int scif_setup_scifdev(void) static void scif_destroy_scifdev(void) { kfree(scif_dev); + scif_dev = NULL; } static int scif_probe(struct scif_hw_dev *sdev) -- 2.20.1
