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drm/syncobj: fix leaking dma_fence in drm_syncobj_query_ioctl 

We need to check the context number instead if the previous sequence to detect
an error and if an error is detected we need to drop the reference to the
current fence or otherwise would leak it.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 27b575a9aa ("drm/syncobj: add timeline payload query ioctl v6")
Link: https://patchwork.freedesktop.org/patch/319123/
alistair/sunxi64-5.4-dsi
Christian König 2019-07-22 14:56:25 +02:00
parent 4de09ffcf4
commit b33b556ce5
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/drm/drm_syncobj.c
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@ -1298,14 +1298,14 @@ int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct dma_fence *iter, *last_signaled = NULL;
dma_fence_chain_for_each(iter, fence) {
if (!iter)
break;
dma_fence_put(last_signaled);
last_signaled = dma_fence_get(iter);
if (!to_dma_fence_chain(last_signaled)->prev_seqno)
if (iter->context != fence->context) {
dma_fence_put(iter);
/* It is most likely that timeline has
* unorder points. */
break;
}
dma_fence_put(last_signaled);
last_signaled = dma_fence_get(iter);
}
point = dma_fence_is_signaled(last_signaled) ?
last_signaled->seqno :