The 'sparse' variable may leak when return in function
intel_vgpu_ioctl(), and this patch fix this.
Signed-off-by: Yi Wang <wang.yi59@xxxxxxxxxx>
Reviewed-by: Jiang Biao <jiang.biao2@xxxxxxxxxx>
---
v2: fix a double-free error. Thanks to Zhenyu Wang.
drivers/gpu/drm/i915/gvt/kvmgt.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index df4e4a0..bce60cc 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1195,11 +1195,13 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
&sparse->header, sizeof(*sparse) +
(sparse->nr_areas *
sizeof(*sparse->areas)));
- kfree(sparse);
- if (ret)
+ if (ret) {
+ kfree(sparse);
return ret;
+ }
break;
default:
+ kfree(sparse);
return -EINVAL;
}
}
@@ -1215,6 +1217,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
sizeof(info), caps.buf,
caps.size)) {
kfree(caps.buf);
+ kfree(sparse);
return -EFAULT;
}
info.cap_offset = sizeof(info);
@@ -1223,6 +1226,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
kfree(caps.buf);
}
+ kfree(sparse);
return copy_to_user((void __user *)arg, &info, minsz) ?
-EFAULT : 0;
} else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
--
1.8.3.1
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