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Merge pull request #10684 from jdgleaver/thumb-download-fix

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(On Demand Thumbnails) Fix heap-use-after-free error
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Autechre 2020-05-22 14:05:47 +02:00 committed by GitHub
commit 6652bb4795
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 35 additions and 36 deletions
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71
tasks/task_pl_thumbnail_download.c
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@ -282,30 +282,30 @@ static void download_pl_thumbnail(pl_thumb_handle_t *pl_thumb)
}
}
static void free_pl_thumb_handle(pl_thumb_handle_t *pl_thumb, bool free_playlist)
static void free_pl_thumb_handle(pl_thumb_handle_t *pl_thumb)
{
if (!pl_thumb)
return;
if (!string_is_empty(pl_thumb->system))
if (pl_thumb->system)
{
free(pl_thumb->system);
pl_thumb->system = NULL;
}
if (!string_is_empty(pl_thumb->playlist_path))
if (pl_thumb->playlist_path)
{
free(pl_thumb->playlist_path);
pl_thumb->playlist_path = NULL;
}
if (!string_is_empty(pl_thumb->dir_thumbnails))
if (pl_thumb->dir_thumbnails)
{
free(pl_thumb->dir_thumbnails);
pl_thumb->dir_thumbnails = NULL;
}
if (pl_thumb->playlist && free_playlist)
if (pl_thumb->playlist)
{
playlist_free(pl_thumb->playlist);
pl_thumb->playlist = NULL;
@ -452,7 +452,7 @@ task_finished:
if (task)
task_set_finished(task, true);
free_pl_thumb_handle(pl_thumb, true);
free_pl_thumb_handle(pl_thumb);
}
static bool task_pl_thumbnail_finder(retro_task_t *task, void *user_data)
@ -645,7 +645,7 @@ static void task_pl_entry_thumbnail_free(retro_task_t *task)
pl_thumb = (pl_thumb_handle_t*)task->state;
free_pl_thumb_handle(pl_thumb, false);
free_pl_thumb_handle(pl_thumb);
}
static void task_pl_entry_thumbnail_download_handler(retro_task_t *task)
@ -671,31 +671,6 @@ static void task_pl_entry_thumbnail_download_handler(retro_task_t *task)
const char *right_thumbnail_path = NULL;
const char *left_thumbnail_path = NULL;
/* Redundant safety check - ensure that playlist is
* non-NULL, and that the playlist path is the same
* as that recorded when task_push_pl_entry_thumbnail_download()
* was called... */
if (!pl_thumb->playlist)
goto task_finished;
if (!string_is_equal(pl_thumb->playlist_path,
playlist_get_conf_path(pl_thumb->playlist)))
goto task_finished;
/* Initialise thumbnail path data */
pl_thumb->thumbnail_path_data = gfx_thumbnail_path_init();
if (!pl_thumb->thumbnail_path_data)
goto task_finished;
if (!gfx_thumbnail_set_system(
pl_thumb->thumbnail_path_data, pl_thumb->system, pl_thumb->playlist))
goto task_finished;
if (!gfx_thumbnail_set_content_playlist(
pl_thumb->thumbnail_path_data, pl_thumb->playlist, pl_thumb->list_index))
goto task_finished;
/* Check whether current right/left thumbnails
* already exist (required for menu refresh callback) */
pl_thumb->right_thumbnail_exists = false;
@ -805,6 +780,8 @@ bool task_push_pl_entry_thumbnail_download(
pl_thumb_handle_t *pl_thumb = (pl_thumb_handle_t*)calloc(1, sizeof(pl_thumb_handle_t));
pl_entry_id_t *entry_id = (pl_entry_id_t*)calloc(1, sizeof(pl_entry_id_t));
char *playlist_path = NULL;
gfx_thumbnail_path_data_t *
thumbnail_path_data = NULL;
const char *dir_thumbnails = NULL;
/* Sanity check */
@ -845,6 +822,22 @@ bool task_push_pl_entry_thumbnail_download(
free(entry_id);
entry_id = NULL;
/* Initialise thumbnail path data
* > Have to do this here rather than in the
* task handler to avoid thread race conditions */
thumbnail_path_data = gfx_thumbnail_path_init();
if (!thumbnail_path_data)
goto error;
if (!gfx_thumbnail_set_system(
thumbnail_path_data, system, playlist))
goto error;
if (!gfx_thumbnail_set_content_playlist(
thumbnail_path_data, playlist, idx))
goto error;
/* Configure task */
task->handler = task_pl_entry_thumbnail_download_handler;
task->state = pl_thumb;
@ -856,11 +849,11 @@ bool task_push_pl_entry_thumbnail_download(
task->cleanup = task_pl_entry_thumbnail_free;
/* Configure handle */
pl_thumb->system = strdup(system);
pl_thumb->system = NULL;
pl_thumb->playlist_path = playlist_path;
pl_thumb->dir_thumbnails = strdup(dir_thumbnails);
pl_thumb->playlist = playlist;
pl_thumb->thumbnail_path_data = NULL;
pl_thumb->playlist = NULL;
pl_thumb->thumbnail_path_data = thumbnail_path_data;
pl_thumb->http_task = NULL;
pl_thumb->http_task_complete = false;
pl_thumb->list_size = playlist_size(playlist);
@ -893,11 +886,17 @@ error:
entry_id = NULL;
}
if (!string_is_empty(playlist_path))
if (playlist_path)
{
free(playlist_path);
playlist_path = NULL;
}
if (thumbnail_path_data)
{
free(thumbnail_path_data);
thumbnail_path_data = NULL;
}
return false;
}