[PATCH 05/12] drm/v3d: Validate passed in drm syncobj handles in the performance extension

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>

If userspace provides an unknown or invalid handle anywhere in the handle
array the rest of the driver will not handle that well.

Fix it by checking handle was looked up successfuly or otherwise fail the
extension by jumping into the existing unwind.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>
Fixes: bae7cb5d6800 ("drm/v3d: Create a CPU job extension for the reset performance query job"
Cc: Maíra Canal <mcanal@xxxxxxxxxx>
Cc: Iago Toral Quiroga <itoral@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v6.8+
---
 drivers/gpu/drm/v3d/v3d_submit.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c
index 3313423080e7..b51600e236c8 100644
--- a/drivers/gpu/drm/v3d/v3d_submit.c
+++ b/drivers/gpu/drm/v3d/v3d_submit.c
@@ -706,6 +706,10 @@ v3d_get_cpu_reset_performance_params(struct drm_file *file_priv,
 		}
 
 		job->performance_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync);
+		if (!job->performance_query.queries[i].syncobj) {
+			err = -ENOENT;
+			goto error;
+		}
 	}
 	job->performance_query.count = reset.count;
 	job->performance_query.nperfmons = reset.nperfmons;
@@ -787,6 +791,10 @@ v3d_get_cpu_copy_performance_query_params(struct drm_file *file_priv,
 		}
 
 		job->performance_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync);
+		if (!job->performance_query.queries[i].syncobj) {
+			err = -ENOENT;
+			goto error;
+		}
 	}
 	job->performance_query.count = copy.count;
 	job->performance_query.nperfmons = copy.nperfmons;
-- 
2.44.0





[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux