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Wed, 5 Jan 2022 08:29:32 +0000 (GMT) Received: from [9.43.99.48] (unknown [9.43.99.48]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 5 Jan 2022 08:29:31 +0000 (GMT) Message-ID: <63380c22-a163-2664-62be-2cf401065e73@linux.vnet.ibm.com> Date: Wed, 5 Jan 2022 13:56:53 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Content-Language: en-US Cc: alexandr.lobakin@intel.com, "kuba@kernel.org >> Jakub Kicinski" , dumazet@google.com, brian King , linuxppc-dev , netdev From: Abdul Haleem Subject: [5.16.0-rc5][ppc][net] kernel oops when hotplug remove of vNIC interface To: linux-kernel Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 3lSDvtLjC7hXrJ5K58EV8ilW6-bjGaAw X-Proofpoint-ORIG-GUID: zg1rzLiCKba6e1FbQN6PtOb5jekeE4Ir X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-05_02,2022-01-04_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 mlxscore=0 bulkscore=0 clxscore=1011 suspectscore=0 malwarescore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201050053 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Greeting's Mainline kernel 5.16.0-rc5 panics when DLPAR ADD of vNIC device on my Powerpc LPAR Perform below dlpar commands in a loop from linux OS drmgr -r -c slot -s U9080.HEX.134C488-V1-C3 -w 5 -d 1 drmgr -a -c slot -s U9080.HEX.134C488-V1-C3 -w 5 -d 1 after 7th iteration, the kernel panics with below messages console messages: [102056] ibmvnic 30000003 env3: Sending CRQ: 801e000864000000 0060000000000000 ibmvnic 30000003 env3: Handling CRQ: 809e000800000000 0000000000000000 [102056] ibmvnic 30000003 env3: Disabling tx_scrq[0] irq [102056] ibmvnic 30000003 env3: Disabling tx_scrq[1] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[0] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[1] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[2] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[3] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[4] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[5] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[6] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[7] irq [102056] ibmvnic 30000003 env3: Replenished 8 pools Kernel attempted to read user page (10) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000010 Faulting instruction address: 0xc000000000a3c840 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: bridge stp llc ib_core rpadlpar_io rpaphp nfnetlink tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag bonding rfkill ibmvnic sunrpc pseries_rng xts vmx_crypto gf128mul sch_fq_codel binfmt_misc ip_tables ext4 mbcache jbd2 dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse CPU: 9 PID: 102056 Comm: kworker/9:2 Kdump: loaded Not tainted 5.16.0-rc5-autotest-g6441998e2e37 #1 Workqueue: events_long __ibmvnic_reset [ibmvnic] NIP:  c000000000a3c840 LR: c0080000029b5378 CTR: c000000000a3c820 REGS: c0000000548e37e0 TRAP: 0300   Not tainted (5.16.0-rc5-autotest-g6441998e2e37) MSR:  8000000000009033   CR: 28248484  XER: 00000004 CFAR: c0080000029bdd24 DAR: 0000000000000010 DSISR: 40000000 IRQMASK: 0 GPR00: c0080000029b55d0 c0000000548e3a80 c0000000028f0200 0000000000000000 GPR04: c000000c7d1a7e00 fffffffffffffff6 0000000000000027 c000000c7d1a7e08 GPR08: 0000000000000023 0000000000000000 0000000000000010 c0080000029bdd10 GPR12: c000000000a3c820 c000000c7fca6680 0000000000000000 c000000133016bf8 GPR16: 00000000000003fe 0000000000001000 0000000000000002 0000000000000008 GPR20: c000000133016eb0 0000000000000000 0000000000000000 0000000000000003 GPR24: c000000133016000 c000000133017168 0000000020000000 c000000133016a00 GPR28: 0000000000000006 c000000133016a00 0000000000000001 c000000133016000 NIP [c000000000a3c840] napi_enable+0x20/0xc0 LR [c0080000029b5378] __ibmvnic_open+0xf0/0x430 [ibmvnic] Call Trace: [c0000000548e3a80] [0000000000000006] 0x6 (unreliable) [c0000000548e3ab0] [c0080000029b55d0] __ibmvnic_open+0x348/0x430 [ibmvnic] [c0000000548e3b40] [c0080000029bcc28] __ibmvnic_reset+0x500/0xdf0 [ibmvnic] [c0000000548e3c60] [c000000000176228] process_one_work+0x288/0x570 [c0000000548e3d00] [c000000000176588] worker_thread+0x78/0x660 [c0000000548e3da0] [c0000000001822f0] kthread+0x1c0/0x1d0 [c0000000548e3e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64 Instruction dump: 7d2948f8 792307e0 4e800020 60000000 3c4c01eb 384239e0 f821ffd1 39430010 38a0fff6 e92d1100 f9210028 39200000 f9010020 60420000 e9210020 ---[ end trace 5f8033b08fd27706 ]--- radix-mmu: Page sizes from device-tree: the fault instruction points to [root@ltcden11-lp1 boot]# gdb -batch vmlinuz-5.16.0-rc5-autotest-g6441998e2e37 -ex 'list *(0xc000000000a3c840)' 0xc000000000a3c840 is in napi_enable (net/core/dev.c:6966). 6961    void napi_enable(struct napi_struct *n) 6962    { 6963        unsigned long val, new; 6964 6965        do { 6966            val = READ_ONCE(n->state); 6967            BUG_ON(!test_bit(NAPI_STATE_SCHED, &val)); 6968 6969            new = val & ~(NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC); 6970            if (n->dev->threaded && n->thread) -- Regard's Abdul Haleem IBM Linux Technology Center From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 60250C433F5 for ; Wed, 5 Jan 2022 08:30:39 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4JTN3K1pv2z30jZ for ; Wed, 5 Jan 2022 19:30:37 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; 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Wed, 5 Jan 2022 08:29:32 +0000 (GMT) Received: from [9.43.99.48] (unknown [9.43.99.48]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 5 Jan 2022 08:29:31 +0000 (GMT) Message-ID: <63380c22-a163-2664-62be-2cf401065e73@linux.vnet.ibm.com> Date: Wed, 5 Jan 2022 13:56:53 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Content-Language: en-US From: Abdul Haleem Subject: [5.16.0-rc5][ppc][net] kernel oops when hotplug remove of vNIC interface To: linux-kernel Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 3lSDvtLjC7hXrJ5K58EV8ilW6-bjGaAw X-Proofpoint-ORIG-GUID: zg1rzLiCKba6e1FbQN6PtOb5jekeE4Ir X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-05_02,2022-01-04_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 mlxscore=0 bulkscore=0 clxscore=1011 suspectscore=0 malwarescore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201050053 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dumazet@google.com, netdev , alexandr.lobakin@intel.com, brian King , "kuba@kernel.org >> Jakub Kicinski" , linuxppc-dev Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Greeting's Mainline kernel 5.16.0-rc5 panics when DLPAR ADD of vNIC device on my Powerpc LPAR Perform below dlpar commands in a loop from linux OS drmgr -r -c slot -s U9080.HEX.134C488-V1-C3 -w 5 -d 1 drmgr -a -c slot -s U9080.HEX.134C488-V1-C3 -w 5 -d 1 after 7th iteration, the kernel panics with below messages console messages: [102056] ibmvnic 30000003 env3: Sending CRQ: 801e000864000000 0060000000000000 ibmvnic 30000003 env3: Handling CRQ: 809e000800000000 0000000000000000 [102056] ibmvnic 30000003 env3: Disabling tx_scrq[0] irq [102056] ibmvnic 30000003 env3: Disabling tx_scrq[1] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[0] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[1] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[2] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[3] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[4] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[5] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[6] irq [102056] ibmvnic 30000003 env3: Disabling rx_scrq[7] irq [102056] ibmvnic 30000003 env3: Replenished 8 pools Kernel attempted to read user page (10) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000010 Faulting instruction address: 0xc000000000a3c840 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: bridge stp llc ib_core rpadlpar_io rpaphp nfnetlink tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag bonding rfkill ibmvnic sunrpc pseries_rng xts vmx_crypto gf128mul sch_fq_codel binfmt_misc ip_tables ext4 mbcache jbd2 dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse CPU: 9 PID: 102056 Comm: kworker/9:2 Kdump: loaded Not tainted 5.16.0-rc5-autotest-g6441998e2e37 #1 Workqueue: events_long __ibmvnic_reset [ibmvnic] NIP:  c000000000a3c840 LR: c0080000029b5378 CTR: c000000000a3c820 REGS: c0000000548e37e0 TRAP: 0300   Not tainted (5.16.0-rc5-autotest-g6441998e2e37) MSR:  8000000000009033   CR: 28248484  XER: 00000004 CFAR: c0080000029bdd24 DAR: 0000000000000010 DSISR: 40000000 IRQMASK: 0 GPR00: c0080000029b55d0 c0000000548e3a80 c0000000028f0200 0000000000000000 GPR04: c000000c7d1a7e00 fffffffffffffff6 0000000000000027 c000000c7d1a7e08 GPR08: 0000000000000023 0000000000000000 0000000000000010 c0080000029bdd10 GPR12: c000000000a3c820 c000000c7fca6680 0000000000000000 c000000133016bf8 GPR16: 00000000000003fe 0000000000001000 0000000000000002 0000000000000008 GPR20: c000000133016eb0 0000000000000000 0000000000000000 0000000000000003 GPR24: c000000133016000 c000000133017168 0000000020000000 c000000133016a00 GPR28: 0000000000000006 c000000133016a00 0000000000000001 c000000133016000 NIP [c000000000a3c840] napi_enable+0x20/0xc0 LR [c0080000029b5378] __ibmvnic_open+0xf0/0x430 [ibmvnic] Call Trace: [c0000000548e3a80] [0000000000000006] 0x6 (unreliable) [c0000000548e3ab0] [c0080000029b55d0] __ibmvnic_open+0x348/0x430 [ibmvnic] [c0000000548e3b40] [c0080000029bcc28] __ibmvnic_reset+0x500/0xdf0 [ibmvnic] [c0000000548e3c60] [c000000000176228] process_one_work+0x288/0x570 [c0000000548e3d00] [c000000000176588] worker_thread+0x78/0x660 [c0000000548e3da0] [c0000000001822f0] kthread+0x1c0/0x1d0 [c0000000548e3e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64 Instruction dump: 7d2948f8 792307e0 4e800020 60000000 3c4c01eb 384239e0 f821ffd1 39430010 38a0fff6 e92d1100 f9210028 39200000 f9010020 60420000 e9210020 ---[ end trace 5f8033b08fd27706 ]--- radix-mmu: Page sizes from device-tree: the fault instruction points to [root@ltcden11-lp1 boot]# gdb -batch vmlinuz-5.16.0-rc5-autotest-g6441998e2e37 -ex 'list *(0xc000000000a3c840)' 0xc000000000a3c840 is in napi_enable (net/core/dev.c:6966). 6961    void napi_enable(struct napi_struct *n) 6962    { 6963        unsigned long val, new; 6964 6965        do { 6966            val = READ_ONCE(n->state); 6967            BUG_ON(!test_bit(NAPI_STATE_SCHED, &val)); 6968 6969            new = val & ~(NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC); 6970            if (n->dev->threaded && n->thread) -- Regard's Abdul Haleem IBM Linux Technology Center