From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 2 Jul 2020 09:39:31 +0000 (-0400)
Subject: kvm: use more precise cast and do not drop __user
X-Git-Tag: v5.8-rc5~39^2~4
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/1393b4aaf9e1e803d59726053d542cebd4e2b5b2

kvm: use more precise cast and do not drop __user

Sparse complains on a call to get_compat_sigset, fix it.  The "if"
right above explains that sigmask_arg->sigset is basically a
compat_sigset_t.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a852af5c3214..0a68c9d3d3ab 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3350,7 +3350,8 @@ static long kvm_vcpu_compat_ioctl(struct file *filp,
 			if (kvm_sigmask.len != sizeof(compat_sigset_t))
 				goto out;
 			r = -EFAULT;
-			if (get_compat_sigset(&sigset, (void *)sigmask_arg->sigset))
+			if (get_compat_sigset(&sigset,
+					      (compat_sigset_t __user *)sigmask_arg->sigset))
 				goto out;
 			r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
 		} else