On 2019年08月16日 21:05, Dan Carpenter wrote:
On Fri, Aug 16, 2019 at 10:25:50AM +0800, Zhao Yakui wrote:+ case IC_ASSIGN_PTDEV: { + unsigned short bdf; + + if (copy_from_user(&bdf, (void *)ioctl_param,This casting is ugly and you also need a __user tag for Sparse. Do something like "void __user *p = ioctl_param;"
Sure. The __user tag will be added for the ioctl_param parameter of copy_from/to_user.
+ sizeof(unsigned short))) + return -EFAULT; + + ret = hcall_assign_ptdev(vm->vmid, bdf); + if (ret < 0) { + pr_err("acrn: failed to assign ptdev!\n"); + return -EFAULT;Preserve the error code. "return ret;".
Ok. It will preserver the err code.
+ } + break; + } + case IC_DEASSIGN_PTDEV: { + unsigned short bdf; + + if (copy_from_user(&bdf, (void *)ioctl_param, + sizeof(unsigned short))) + return -EFAULT; + + ret = hcall_deassign_ptdev(vm->vmid, bdf); + if (ret < 0) { + pr_err("acrn: failed to deassign ptdev!\n"); + return -EFAULT; + } + break; + } + + case IC_SET_PTDEV_INTR_INFO: { + struct ic_ptdev_irq ic_pt_irq; + struct hc_ptdev_irq *hc_pt_irq; + + if (copy_from_user(&ic_pt_irq, (void *)ioctl_param, + sizeof(ic_pt_irq))) + return -EFAULT; + + hc_pt_irq = kmalloc(sizeof(*hc_pt_irq), GFP_KERNEL); + if (!hc_pt_irq) + return -ENOMEM; + + memcpy(hc_pt_irq, &ic_pt_irq, sizeof(*hc_pt_irq));Use memdup_user().
OK. The memdup_user will be used.
+ + ret = hcall_set_ptdev_intr_info(vm->vmid, + virt_to_phys(hc_pt_irq)); + kfree(hc_pt_irq); + if (ret < 0) { + pr_err("acrn: failed to set intr info for ptdev!\n"); + return -EFAULT; + } + + break; + }regards, dan carpenter
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