diff options
| author | Pavel Begunkov | 2021-06-17 18:13:59 +0100 |
|---|---|---|
| committer | Jens Axboe | 2021-06-18 09:22:02 -0600 |
| commit | e6ab8991c5d0b0deae0961dc22c0edd1dee328f5 (patch) | |
| tree | d7067842f0aae168bbd1502c01d612db3e348067 /fs | |
| parent | fe76421d1da1dcdb3a2cd8428ac40106bff28bc0 (diff) | |
io_uring: fix false WARN_ONCE
WARNING: CPU: 1 PID: 11749 at fs/io-wq.c:244 io_wqe_wake_worker fs/io-wq.c:244 [inline]
WARNING: CPU: 1 PID: 11749 at fs/io-wq.c:244 io_wqe_enqueue+0x7f6/0x910 fs/io-wq.c:751
A WARN_ON_ONCE() in io_wqe_wake_worker() can be triggered by a valid
userspace setup. Replace it with pr_warn.
Reported-by: syzbot+ea2f1484cffe5109dc10@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f7ede342c3342c4c26668f5168e2993e38bbd99c.1623949695.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io-wq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index bb4d3ee9592e..843d4a7bcd6e 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -240,7 +240,8 @@ static void io_wqe_wake_worker(struct io_wqe *wqe, struct io_wqe_acct *acct) * Most likely an attempt to queue unbounded work on an io_wq that * wasn't setup with any unbounded workers. */ - WARN_ON_ONCE(!acct->max_workers); + if (unlikely(!acct->max_workers)) + pr_warn_once("io-wq is not configured for unbound workers"); rcu_read_lock(); ret = io_wqe_activate_free_worker(wqe); @@ -901,6 +902,8 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data) if (WARN_ON_ONCE(!data->free_work || !data->do_work)) return ERR_PTR(-EINVAL); + if (WARN_ON_ONCE(!bounded)) + return ERR_PTR(-EINVAL); wq = kzalloc(struct_size(wq, wqes, nr_node_ids), GFP_KERNEL); if (!wq) |