Subject: Coverity: io_wqe_worker(): Program hangs

From: coverity-bot <[email-masked]>
Date: Mon, 28 Oct 2019 16:05:29 -0700

Hello!

This is an experimental automated report about issues detected by Coverity
from a scan of next-20191025 as part of the linux-next weekly scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by recent commits:

46134db8fdc5 ("io-wq: small threadpool implementation for io_uring")

Coverity reported the following:

*** CID 1487365:  Program hangs  (LOCK)
/fs/io-wq.c: 349 in io_wqe_worker()
343     			io_worker_handle_work(worker);
344     		else
345     			spin_unlock(&wqe->lock);
346     	}
347
348     	io_worker_exit(worker);
vvv     CID 1487365:  Program hangs  (LOCK)
vvv     Returning without unlocking "(*wqe).lock".
349     	return 0;
350     }
351
352     /*
353      * Check head of free list for an available worker. If one isn't available,
354      * caller must wake up the wq manager to create one.

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include:

Reported-by: coverity-bot <[email-masked]>
Addresses-Coverity-ID: 1487365 ("Program hangs")
Fixes: 46134db8fdc5 ("io-wq: small threadpool implementation for io_uring")

Thanks for your attention!

-- 
Coverity-bot