From: Ronnie Sahlberg <rsahlberg@xxxxxxxxxxxxx> Sanity check the values for queue depth and number of queues we get from userspace when adding a device. Signed-off-by: Ronnie Sahlberg <rsahlberg@xxxxxxxxxxxxx> --- drivers/block/ublk_drv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 374e4efa8759..febdb5609e95 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2336,6 +2336,9 @@ static int ublk_ctrl_add_dev(struct io_uring_cmd *cmd) if (copy_from_user(&info, argp, sizeof(info))) return -EFAULT; + if (info.queue_depth > UBLK_MAX_QUEUE_DEPTH || info.nr_hw_queues > UBLK_MAX_NR_QUEUES) + return -EINVAL; + if (capable(CAP_SYS_ADMIN)) info.flags &= ~UBLK_F_UNPRIVILEGED_DEV; else if (!(info.flags & UBLK_F_UNPRIVILEGED_DEV)) -- 2.43.5
