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Fri, 19 Sep 2025 03:16:25 -0400 X-MC-Unique: oerQSmVxMgawAOdC8RF6Kw-1 X-Mimecast-MFC-AGG-ID: oerQSmVxMgawAOdC8RF6Kw_1758266183 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3B97C180057B; Fri, 19 Sep 2025 07:16:23 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.224.65]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id 03AF819560BB; Fri, 19 Sep 2025 07:16:18 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Fri, 19 Sep 2025 09:14:59 +0200 (CEST) Date: Fri, 19 Sep 2025 09:14:54 +0200 From: Oleg Nesterov To: syzbot Cc: brauner@kernel.org, dhowells@redhat.com, jack@suse.cz, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netfs@lists.linux.dev, pc@manguebit.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Subject: Re: [syzbot] [netfs?] INFO: task hung in vfs_utimes (3) Message-ID: <20250919071454.GA20615@redhat.com> References: <68cb3c24.050a0220.50883.0028.GAE@google.com> <68cca807.050a0220.28a605.0013.GAE@google.com> Precedence: bulk X-Mailing-List: netfs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <68cca807.050a0220.28a605.0013.GAE@google.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 On 09/18, syzbot wrote: > > syzbot has bisected this issue to: > > commit aaec5a95d59615523db03dd53c2052f0a87beea7 > Author: Oleg Nesterov > Date: Thu Jan 2 14:07:15 2025 +0000 > > pipe_read: don't wake up the writer if the pipe is still full > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175fa534580000 > start commit: 46a51f4f5eda Merge tag 'for-v6.17-rc' of git://git.kernel... > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=14dfa534580000 > console output: https://syzkaller.appspot.com/x/log.txt?x=10dfa534580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8f01d8629880e620 > dashboard link: https://syzkaller.appspot.com/bug?extid=3815dce0acab6c55984e > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17692f62580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1361f47c580000 > > Reported-by: syzbot+3815dce0acab6c55984e@syzkaller.appspotmail.com > Fixes: aaec5a95d596 ("pipe_read: don't wake up the writer if the pipe is still full") #syz dup: [syzbot] [fs?] [mm?] INFO: task hung in v9fs_file_fsync https://lore.kernel.org/all/68a2de8f.050a0220.e29e5.0097.GAE@google.com/