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Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20250323184848.GB14883@redhat.com> References: <20250323184848.GB14883@redhat.com> <67dedd2f.050a0220.31a16b.003f.GAE@google.com> To: syzbot Cc: dhowells@redhat.com, Oleg Nesterov , brauner@kernel.org, jack@suse.cz, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netfs@lists.linux.dev, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, K Prateek Nayak , "Sapkal, Swapnil" , Mateusz Guzik Subject: Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <86990.1743185694.1@warthog.procyon.org.uk> Content-Transfer-Encoding: quoted-printable Date: Fri, 28 Mar 2025 18:14:54 +0000 Message-ID: <86991.1743185694@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs= .git netfs-fixes There's inconsistency with some wakeups between using rreq->waitq (a pri= vate waitqueue) and using clear_and_wake_up_bit() (a shared global waitqueue)= . The reason I didn't get round to posting the patches on this branch yet = is that they *ought* to fix the problem, but Steve French still sees an occasional hang with cifs - but only in his automated testing thing, and= we haven't tracked it down yet. David