On Wed, Jun 28, 2017 at 09:30:00AM -0700, Shaohua Li wrote: > From: Shaohua Li <shli@xxxxxx> > > bio_free isn't a good place to free cgroup/integrity info. There are a > lot of cases bio is allocated in special way (for example, in stack) and > never gets called by bio_put hence bio_free, we are leaking memory. This > patch moves the free to bio endio, which should be called anyway. The > __bio_free call in bio_free is kept, in case the bio never gets called > bio endio. > > This assumes ->bi_end_io() doesn't access cgroup/integrity info, which > seems true in my audit. Otherwise, we probably must add a flag to > distinguish if bio will be called by bio_put. bio_integrity_endio -> bio_integrity_verify_fn -> bio_integrity_process access the integrity data, so I don't think this works as-is.
