| commit | 7ea6bf2e6c409e245a31b9ac6a4ba24949ad442f | [log] [tgz] |
|---|---|---|
| author | Ming Lei <ming.lei@redhat.com> | Fri Oct 09 12:03:56 2020 +0800 |
| committer | Jens Axboe <axboe@kernel.dk> | Fri Oct 09 12:32:06 2020 -0600 |
| tree | 709047965688b8a10260522de051e5fe23afbbb9 | |
| parent | f4ac712e4fe009635344b9af5d890fe25fcc8c0d [diff] |
percpu_ref: don't refer to ref->data if it isn't allocated
We can't check ref->data->confirm_switch directly in __percpu_ref_exit(), since
ref->data may not be allocated in one not-initialized refcount.
Fixes: 2b0d3d3e4fcf ("percpu_ref: reduce memory footprint of percpu_ref in fast path")
Reported-by: syzbot+fd15ff734dace9e16437@syzkaller.appspotmail.com
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>