From: Tvrtko Ursulin tvrtko.ursulin@igalia.com
If fetching of userspace memory fails during the main loop, all drm sync objs looked up until that point will be leaked because of the missing drm_syncobj_put.
Fix it by exporting and using a common cleanup helper.
Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com Fixes: 9ba0ff3e083f ("drm/v3d: Create a CPU job extension for the timestamp query job") Cc: Maíra Canal mcanal@igalia.com Cc: Iago Toral Quiroga itoral@igalia.com Cc: stable@vger.kernel.org # v6.8+ --- drivers/gpu/drm/v3d/v3d_drv.h | 2 ++ drivers/gpu/drm/v3d/v3d_sched.c | 22 +++++++++++++------ drivers/gpu/drm/v3d/v3d_submit.c | 36 ++++++++++++++++++++++---------- 3 files changed, 43 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h index 099b962bdfde..95651c3c926f 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.h +++ b/drivers/gpu/drm/v3d/v3d_drv.h @@ -563,6 +563,8 @@ void v3d_mmu_insert_ptes(struct v3d_bo *bo); void v3d_mmu_remove_ptes(struct v3d_bo *bo);
/* v3d_sched.c */ +void __v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo, + unsigned int count); void v3d_job_update_stats(struct v3d_job *job, enum v3d_queue queue); int v3d_sched_init(struct v3d_dev *v3d); void v3d_sched_fini(struct v3d_dev *v3d); diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c index 03df37a3acf5..e45d3ddc6f82 100644 --- a/drivers/gpu/drm/v3d/v3d_sched.c +++ b/drivers/gpu/drm/v3d/v3d_sched.c @@ -73,18 +73,28 @@ v3d_sched_job_free(struct drm_sched_job *sched_job) v3d_job_cleanup(job); }
+void +__v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo, + unsigned int count) +{ + if (qinfo->queries) { + unsigned int i; + + for (i = 0; i < count; i++) + drm_syncobj_put(qinfo->queries[i].syncobj); + + kvfree(qinfo->queries); + } +} + static void v3d_cpu_job_free(struct drm_sched_job *sched_job) { struct v3d_cpu_job *job = to_cpu_job(sched_job); - struct v3d_timestamp_query_info *timestamp_query = &job->timestamp_query; struct v3d_performance_query_info *performance_query = &job->performance_query;
- if (timestamp_query->queries) { - for (int i = 0; i < timestamp_query->count; i++) - drm_syncobj_put(timestamp_query->queries[i].syncobj); - kvfree(timestamp_query->queries); - } + __v3d_timestamp_query_info_free(&job->timestamp_query, + job->timestamp_query.count);
if (performance_query->queries) { for (int i = 0; i < performance_query->count; i++) diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c index 263fefc1d04f..2818afdd4807 100644 --- a/drivers/gpu/drm/v3d/v3d_submit.c +++ b/drivers/gpu/drm/v3d/v3d_submit.c @@ -452,6 +452,7 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, { u32 __user *offsets, *syncs; struct drm_v3d_timestamp_query timestamp; + int err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -484,15 +485,15 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, u32 offset, sync;
if (copy_from_user(&offset, offsets++, sizeof(offset))) { - kvfree(job->timestamp_query.queries); - return -EFAULT; + err = -EFAULT; + goto error; }
job->timestamp_query.queries[i].offset = offset;
if (copy_from_user(&sync, syncs++, sizeof(sync))) { - kvfree(job->timestamp_query.queries); - return -EFAULT; + err = -EFAULT; + goto error; }
job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -500,6 +501,10 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, job->timestamp_query.count = timestamp.count;
return 0; + +error: + __v3d_timestamp_query_info_free(qinfo, i); + return err; }
static int @@ -509,6 +514,7 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, { u32 __user *syncs; struct drm_v3d_reset_timestamp_query reset; + int err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -539,8 +545,8 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, job->timestamp_query.queries[i].offset = reset.offset + 8 * i;
if (copy_from_user(&sync, syncs++, sizeof(sync))) { - kvfree(job->timestamp_query.queries); - return -EFAULT; + err = -EFAULT; + goto error; }
job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -548,6 +554,10 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, job->timestamp_query.count = reset.count;
return 0; + +error: + __v3d_timestamp_query_info_free(qinfo, i); + return err; }
/* Get data for the copy timestamp query results job submission. */ @@ -558,7 +568,7 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, { u32 __user *offsets, *syncs; struct drm_v3d_copy_timestamp_query copy; - int i; + int i, err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -591,15 +601,15 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, u32 offset, sync;
if (copy_from_user(&offset, offsets++, sizeof(offset))) { - kvfree(job->timestamp_query.queries); - return -EFAULT; + err = -EFAULT; + goto error; }
job->timestamp_query.queries[i].offset = offset;
if (copy_from_user(&sync, syncs++, sizeof(sync))) { - kvfree(job->timestamp_query.queries); - return -EFAULT; + err = -EFAULT; + goto error; }
job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -613,6 +623,10 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, job->copy.stride = copy.stride;
return 0; + +error: + __v3d_timestamp_query_info_free(qinfo, i); + return err; }
static int
On 7/10/24 10:41, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin tvrtko.ursulin@igalia.com
If fetching of userspace memory fails during the main loop, all drm sync objs looked up until that point will be leaked because of the missing drm_syncobj_put.
Fix it by exporting and using a common cleanup helper.
Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com
This patch looks fine to me apart from two nits and a compilation issue.
Fixes: 9ba0ff3e083f ("drm/v3d: Create a CPU job extension for the timestamp query job") Cc: Maíra Canal mcanal@igalia.com Cc: Iago Toral Quiroga itoral@igalia.com Cc: stable@vger.kernel.org # v6.8+
drivers/gpu/drm/v3d/v3d_drv.h | 2 ++ drivers/gpu/drm/v3d/v3d_sched.c | 22 +++++++++++++------ drivers/gpu/drm/v3d/v3d_submit.c | 36 ++++++++++++++++++++++---------- 3 files changed, 43 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h index 099b962bdfde..95651c3c926f 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.h +++ b/drivers/gpu/drm/v3d/v3d_drv.h @@ -563,6 +563,8 @@ void v3d_mmu_insert_ptes(struct v3d_bo *bo); void v3d_mmu_remove_ptes(struct v3d_bo *bo); /* v3d_sched.c */ +void __v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo,
unsigned int count);
My two nits:
I believe we never used this `__` pattern in V3D and I'm not sure how comfortable I am to introduce it now. I know it is pretty common in drivers like i915, but I wonder how much semantics we would miss to remove it.
Also, any chance we could use `query_info` instead of `qinfo`? This suggestion applies to all patches in the series that uses `qinfo`.
void v3d_job_update_stats(struct v3d_job *job, enum v3d_queue queue); int v3d_sched_init(struct v3d_dev *v3d); void v3d_sched_fini(struct v3d_dev *v3d); diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c index 03df37a3acf5..e45d3ddc6f82 100644 --- a/drivers/gpu/drm/v3d/v3d_sched.c +++ b/drivers/gpu/drm/v3d/v3d_sched.c @@ -73,18 +73,28 @@ v3d_sched_job_free(struct drm_sched_job *sched_job) v3d_job_cleanup(job); } +void +__v3d_timestamp_query_info_free(struct v3d_timestamp_query_info *qinfo,
unsigned int count)+{
- if (qinfo->queries) {
unsigned int i;for (i = 0; i < count; i++)drm_syncobj_put(qinfo->queries[i].syncobj);kvfree(qinfo->queries);- }
+}
- static void v3d_cpu_job_free(struct drm_sched_job *sched_job) { struct v3d_cpu_job *job = to_cpu_job(sched_job);
- struct v3d_timestamp_query_info *timestamp_query = &job->timestamp_query; struct v3d_performance_query_info *performance_query = &job->performance_query;
- if (timestamp_query->queries) {
for (int i = 0; i < timestamp_query->count; i++)drm_syncobj_put(timestamp_query->queries[i].syncobj);kvfree(timestamp_query->queries);- }
- __v3d_timestamp_query_info_free(&job->timestamp_query,
job->timestamp_query.count);if (performance_query->queries) { for (int i = 0; i < performance_query->count; i++) diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c index 263fefc1d04f..2818afdd4807 100644 --- a/drivers/gpu/drm/v3d/v3d_submit.c +++ b/drivers/gpu/drm/v3d/v3d_submit.c @@ -452,6 +452,7 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, { u32 __user *offsets, *syncs; struct drm_v3d_timestamp_query timestamp;
- int err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -484,15 +485,15 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, u32 offset, sync; if (copy_from_user(&offset, offsets++, sizeof(offset))) {
kvfree(job->timestamp_query.queries);return -EFAULT;
err = -EFAULT;goto error;job->timestamp_query.queries[i].offset = offset; if (copy_from_user(&sync, syncs++, sizeof(sync))) {
kvfree(job->timestamp_query.queries);return -EFAULT;
err = -EFAULT;goto error;job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -500,6 +501,10 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv, job->timestamp_query.count = timestamp.count; return 0;
+error:
- __v3d_timestamp_query_info_free(qinfo, i);
I don't see where `qinfo` is declared in this function.
- return err; }
static int @@ -509,6 +514,7 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, { u32 __user *syncs; struct drm_v3d_reset_timestamp_query reset;
- int err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -539,8 +545,8 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, job->timestamp_query.queries[i].offset = reset.offset + 8 * i; if (copy_from_user(&sync, syncs++, sizeof(sync))) {
kvfree(job->timestamp_query.queries);return -EFAULT;
err = -EFAULT;goto error;job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -548,6 +554,10 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv, job->timestamp_query.count = reset.count; return 0;
+error:
- __v3d_timestamp_query_info_free(qinfo, i);
Same here.
- return err; }
/* Get data for the copy timestamp query results job submission. */ @@ -558,7 +568,7 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, { u32 __user *offsets, *syncs; struct drm_v3d_copy_timestamp_query copy;
- int i;
- int i, err;
if (!job) { DRM_DEBUG("CPU job extension was attached to a GPU job.\n"); @@ -591,15 +601,15 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, u32 offset, sync; if (copy_from_user(&offset, offsets++, sizeof(offset))) {
kvfree(job->timestamp_query.queries);return -EFAULT;
err = -EFAULT;goto error;job->timestamp_query.queries[i].offset = offset; if (copy_from_user(&sync, syncs++, sizeof(sync))) {
kvfree(job->timestamp_query.queries);return -EFAULT;
err = -EFAULT;goto error;job->timestamp_query.queries[i].syncobj = drm_syncobj_find(file_priv, sync); @@ -613,6 +623,10 @@ v3d_get_cpu_copy_query_results_params(struct drm_file *file_priv, job->copy.stride = copy.stride; return 0;
+error:
- __v3d_timestamp_query_info_free(qinfo, i);
Same here.
Best Regards, - Maíra
- return err; }
static int
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Maíra Canal -
Tvrtko Ursulin