These strings come from the user. We strcpy() them inside cf_command() so we should check that they are NULL terminated and return an error if not. Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> --- v2: use strnlen() instead of strlen(). diff --git a/drivers/isdn/divert/divert_procfs.c b/drivers/isdn/divert/divert_procfs.c index 33ec9e4..9021182 100644 --- a/drivers/isdn/divert/divert_procfs.c +++ b/drivers/isdn/divert/divert_procfs.c @@ -242,6 +242,12 @@ static int isdn_divert_ioctl_unlocked(struct file *file, uint cmd, ulong arg) case IIOCDOCFINT: if (!divert_if.drv_to_name(dioctl.cf_ctrl.drvid)) return (-EINVAL); /* invalid driver */ + if (strnlen(dioctl.cf_ctrl.msn, sizeof(dioctl.cf_ctrl.msn)) == + sizeof(dioctl.cf_ctrl.msn)) + return -EINVAL; + if (strnlen(dioctl.cf_ctrl.fwd_nr, sizeof(dioctl.cf_ctrl.fwd_nr)) == + sizeof(dioctl.cf_ctrl.fwd_nr)) + return -EINVAL; if ((i = cf_command(dioctl.cf_ctrl.drvid, (cmd == IIOCDOCFACT) ? 1 : (cmd == IIOCDOCFDIS) ? 0 : 2, dioctl.cf_ctrl.cfproc,
Attachment:
signature.asc
Description: Digital signature
