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modules: clamp input offset and size

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So that we don't cause memory errors with invalid input.
This commit is contained in:
Wim Taymans 2022-06-04 11:47:48 +02:00
parent 24ba3f4d92
commit 0f839c7b61
10 changed files with 96 additions and 61 deletions
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8
src/modules/module-example-sink.c
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@ -187,7 +187,7 @@ static void playback_stream_process(void *d)
struct pw_buffer *buf;
struct spa_data *bd;
void *data;
uint32_t size;
uint32_t offs, size;
if ((buf = pw_stream_dequeue_buffer(impl->stream)) == NULL) {
pw_log_debug("out of buffers: %m");
@ -195,8 +195,10 @@ static void playback_stream_process(void *d)
}
bd = &buf->buffer->datas[0];
data = SPA_PTROFF(bd->data, bd->chunk->offset, void);
size = bd->chunk->size;
offs = SPA_MIN(bd->chunk->offset, bd->maxsize);
size = SPA_MIN(bd->chunk->size, bd->maxsize - offs);
data = SPA_PTROFF(bd->data, offs, void);
/* write buffer contents here */
pw_log_info("got buffer of size %d and data %p", size, data);