lkml.org 
[lkml]   [2018]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.18 109/168] drm/nouveau/mmu: dont attempt to dereference vmm without valid instance pointer
Date
4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Skeggs <bskeggs@redhat.com>

[ Upstream commit 51ed833c881b9d96557c773f6a37018d79e29a46 ]

Fixes oopses in certain failure paths.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
@@ -1423,7 +1423,7 @@ nvkm_vmm_get(struct nvkm_vmm *vmm, u8 pa
void
nvkm_vmm_part(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
{
- if (vmm->func->part && inst) {
+ if (inst && vmm->func->part) {
mutex_lock(&vmm->mutex);
vmm->func->part(vmm, inst);
mutex_unlock(&vmm->mutex);

\
 
 \ /
  Last update: 2018-10-08 20:58    [W:0.551 / U:6.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site