diff options
| author | David S. Miller <davem@davemloft.net> | 2018-09-18 09:33:27 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-18 09:33:27 -0700 |
| commit | e366fa435032db1ce1538a2c029714666985dd48 (patch) | |
| tree | d08bab02ba212339e4cfc0f2e3666435dd795b90 /drivers/gpu/drm/i915/gvt/kvmgt.c | |
| parent | cf7d97e1e54d71679a8b11716dad9d21deb0e1e2 (diff) | |
| parent | 5211da9ca526a5adddee1ccd078e6e33a583ab36 (diff) | |
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
Two new tls tests added in parallel in both net and net-next.
Used Stephen Rothwell's linux-next resolution.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/kvmgt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/kvmgt.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index a45f46d8537f..c7afee37b2b8 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -32,6 +32,7 @@ #include <linux/device.h> #include <linux/mm.h> #include <linux/mmu_context.h> +#include <linux/sched/mm.h> #include <linux/types.h> #include <linux/list.h> #include <linux/rbtree.h> @@ -1792,16 +1793,21 @@ static int kvmgt_rw_gpa(unsigned long handle, unsigned long gpa, info = (struct kvmgt_guest_info *)handle; kvm = info->kvm; - if (kthread) + if (kthread) { + if (!mmget_not_zero(kvm->mm)) + return -EFAULT; use_mm(kvm->mm); + } idx = srcu_read_lock(&kvm->srcu); ret = write ? kvm_write_guest(kvm, gpa, buf, len) : kvm_read_guest(kvm, gpa, buf, len); srcu_read_unlock(&kvm->srcu, idx); - if (kthread) + if (kthread) { unuse_mm(kvm->mm); + mmput(kvm->mm); + } return ret; } |