From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C4351EF0A1 for ; Mon, 7 Apr 2025 21:03:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744059786; cv=none; b=cq5G/uXoedMn4qpD5rnSS0EHxt0b+1VITGJQrsDWdLT4E64EJfRT72oTGYWh5lOq8NdVdEipcAlmVY3xRhUz//WJN7QX5IDl411xcPp3CQeMA2cC+7kJZB2R/Jf0iTU2p+oP9KdP6BX0owcEWCzGxnLPee7v58T0UcgbnOqJq2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744059786; c=relaxed/simple; bh=4ulWWTELilIWBTizVyum5eEbje/DjScnsb3jO0gNZAA=; h=From:In-Reply-To:References:To:Cc:Subject:MIME-Version: Content-Type:Date:Message-ID; b=QUf/3RHhEoLcAm/9/mB6ifZgTk+c49VadWLI+pIyrv6HBiYSZWJq6XSFAl8xuDQqwMHYZlK/sJ4JgRhkIA+93GzlieioOQ4GwfLd/TdyvTNRuzPES98rAazONioWWJE/scmOMgZDIX5F0UFtAgUr5k56jBAIVUDw4AOcU4Alofg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Z/Gk/oVu; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Z/Gk/oVu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1744059784; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4ulWWTELilIWBTizVyum5eEbje/DjScnsb3jO0gNZAA=; b=Z/Gk/oVuBfulnTEg12nv77JFJT7qvcEfB6+zmY+5q9CM5YJdT1TOr+YufGDFAvkJ/1k1M4 XYTYdxIwqzf3e52/2WSwKsYrODTUcMEB4XqyjbqkmqEAxKqwsUSU/I29D966p5fqPXuKhg CugCVvBXtRrki29dnCmTgVsAR1VfLpw= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-587-BHyOQiXOPQmKzRiPOJjl9A-1; Mon, 07 Apr 2025 17:02:25 -0400 X-MC-Unique: BHyOQiXOPQmKzRiPOJjl9A-1 X-Mimecast-MFC-AGG-ID: BHyOQiXOPQmKzRiPOJjl9A_1744059743 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A958D180AF4D; Mon, 7 Apr 2025 21:02:23 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.40]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C6578180B486; Mon, 7 Apr 2025 21:02:20 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <67f3dc05.050a0220.107db6.059d.GAE@google.com> References: <67f3dc05.050a0220.107db6.059d.GAE@google.com> To: syzbot Cc: dhowells@redhat.com, adilger.kernel@dilger.ca, amir73il@gmail.com, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com, tytso@mit.edu Subject: Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f_lock 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: <1465442.1744059739.1@warthog.procyon.org.uk> Content-Transfer-Encoding: quoted-printable Date: Mon, 07 Apr 2025 22:02:19 +0100 Message-ID: <1465443.1744059739@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 syzbot wrote: > syzbot has tested the proposed patch but the reproducer is still trigger= ing an issue: > unregister_netdevice: waiting for DEV to become free > = > unregister_netdevice: waiting for batadv0 to become free. Usage count =3D= 3 I've seen this in a bunch of different syzbot tests also where, as far as = I can tell, the patch I've offered fixes the actual bug. David