From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Thumshirn Subject: Re: [BUG] scsi/fcoe: Sleep-in-atomic bugs in fcoe driver Date: Wed, 4 Oct 2017 12:06:37 +0200 Message-ID: <20171004100637.pucskthcimhhen4k@linux-x5ow.site> References: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Jia-Ju Bai Cc: jth@kernel.org, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, fcoe-devel@open-fcoe.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-scsi@vger.kernel.org On Tue, Oct 03, 2017 at 11:02:33AM +0800, Jia-Ju Bai wrote: > According to fcoe_ctlr.c, the driver may sleep under a RCU lock, > and the function call paths are: > fcoe_ctlr_disc_stop_locked (acquire the RCU lock) > fc_rport_logoff > mutex_lock --> may sleep > > fcoe_ctlr_vn_disc > fc_rport_login > mutex_lock --> may sleep > > fcoe_ctlr_vn_age > fc_rport_logoff > mutex_lock --> may sleep > > These bugs are found by my static analysis tool and my code review. > > Thanks, > Jia-Ju Bai > Thanks for the report, coincidentally I have a bug report for this as well (in a real setup not just static analysis) and gave the reporter a patch to test. Once it's verified I'll post it here. Thanks, Johannes -- Johannes Thumshirn Storage jthumshirn@suse.de +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850