Commit 753ce4fe authored by Tvrtko Ursulin's avatar Tvrtko Ursulin Committed by Maíra Canal

drm/v3d: Fix potential memory leak in the timestamp extension

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: default avatarTvrtko Ursulin <tvrtko.ursulin@igalia.com>
Fixes: 9ba0ff3e ("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+
Reviewed-by: default avatarMaíra Canal <mcanal@igalia.com>
Signed-off-by: default avatarMaíra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240711135340.84617-3-tursulin@igalia.com
parent f32b5128
......@@ -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 *query_info,
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);
......
......@@ -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 *query_info,
unsigned int count)
{
if (query_info->queries) {
unsigned int i;
for (i = 0; i < count; i++)
drm_syncobj_put(query_info->queries[i].syncobj);
kvfree(query_info->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++)
......
......@@ -452,6 +452,8 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv,
{
u32 __user *offsets, *syncs;
struct drm_v3d_timestamp_query timestamp;
unsigned int i;
int err;
if (!job) {
DRM_DEBUG("CPU job extension was attached to a GPU job.\n");
......@@ -480,19 +482,19 @@ v3d_get_cpu_timestamp_query_params(struct drm_file *file_priv,
offsets = u64_to_user_ptr(timestamp.offsets);
syncs = u64_to_user_ptr(timestamp.syncs);
for (int i = 0; i < timestamp.count; i++) {
for (i = 0; i < timestamp.count; i++) {
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 +502,10 @@ 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(&job->timestamp_query, i);
return err;
}
static int
......@@ -509,6 +515,8 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv,
{
u32 __user *syncs;
struct drm_v3d_reset_timestamp_query reset;
unsigned int i;
int err;
if (!job) {
DRM_DEBUG("CPU job extension was attached to a GPU job.\n");
......@@ -533,14 +541,14 @@ v3d_get_cpu_reset_timestamp_params(struct drm_file *file_priv,
syncs = u64_to_user_ptr(reset.syncs);
for (int i = 0; i < reset.count; i++) {
for (i = 0; i < reset.count; i++) {
u32 sync;
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 +556,10 @@ 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(&job->timestamp_query, i);
return err;
}
/* Get data for the copy timestamp query results job submission. */
......@@ -558,7 +570,8 @@ 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;
unsigned int i;
int err;
if (!job) {
DRM_DEBUG("CPU job extension was attached to a GPU job.\n");
......@@ -591,15 +604,15 @@ 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 +626,10 @@ 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(&job->timestamp_query, i);
return err;
}
static int
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment