linux-kernel - Re: fs/netfs/objects.c:148:5-24: WARNING: atomic_dec_and_test variation before object free at line 150.

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Message-ID: <321127.1725823607@warthog.procyon.org.uk>
Date: Sun, 08 Sep 2024 20:26:47 +0100
From: David Howells <dhowells@...hat.com>
To: kernel test robot <lkp@...el.com>
Cc: dhowells@...hat.com, oe-kbuild-all@...ts.linux.dev,
    linux-kernel@...r.kernel.org, Christian Brauner <brauner@...nel.org>,
    Dominique Martinet <asmadeus@...ewreck.org>
Subject: Re: fs/netfs/objects.c:148:5-24: WARNING: atomic_dec_and_test variation before object free at line 150.

kernel test robot <lkp@...el.com> wrote:

>  > 148		if (atomic_dec_and_test(&ictx->io_count))
>    149			wake_up_var(&ictx->io_count);
>  > 150		call_rcu(&rreq->rcu, netfs_free_request_rcu);

->io_count isn't a refcount for the rreq struct.  This is not a bug.

David