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cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 Feb 2020 17:51:04 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 01OHp2fW012446; Mon, 24 Feb 2020 17:51:02 GMT Received: from [10.209.227.41] (/10.209.227.41) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 24 Feb 2020 09:51:02 -0800 Subject: Re: general protection fault in rds_ib_add_one To: Hillf Danton Cc: syzbot , davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, syzkaller-bugs@googlegroups.com References: <20200224103913.2776-1-hdanton@sina.com> From: santosh.shilimkar@oracle.com Organization: Oracle Corporation Message-ID: <8c0a6d58-fd96-ded0-d5ad-a8ffc8d7a620@oracle.com> Date: Mon, 24 Feb 2020 09:51:01 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20200224103913.2776-1-hdanton@sina.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9541 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 bulkscore=0 clxscore=1011 malwarescore=0 impostorscore=0 adultscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 spamscore=0 mlxscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002240132 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/24/20 2:39 AM, Hillf Danton wrote: > > On Mon, 24 Feb 2020 00:38:13 -0800 >> syzbot found the following crash on: >> >> HEAD commit: b0dd1eb2 Merge branch 'akpm' (patches from Andrew) >> git tree: upstream >> console output: https://urldefense.com/v3/__https://syzkaller.appspot.com/x/log.txt?x=13db9de9e00000__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauXTR6PmUg$ >> kernel config: https://urldefense.com/v3/__https://syzkaller.appspot.com/x/.config?x=a6001be4097ab13c__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauUIjkEraA$ >> dashboard link: https://urldefense.com/v3/__https://syzkaller.appspot.com/bug?extid=274094e62023782eeb17__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauXEUExfYg$ >> compiler: clang version 10.0.0 (https://urldefense.com/v3/__https://github.com/llvm/llvm-project/__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauUcUeVf2A$ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) >> syz repro: https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.syz?x=10ad6a7ee00000__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauX2w5ISoA$ >> C reproducer: https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.c?x=13da7a29e00000__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauUf3qIVeQ$ >> >> Bisection is inconclusive: the first bad commit could be any of: [...] >> 868df536 Merge branch 'odp_fixes' into rdma.git for-next >> >> bisection log: https://urldefense.com/v3/__https://syzkaller.appspot.com/x/bisect.txt?x=1542127ee00000__;!!GqivPVa7Brio!O9xt2mwp7Vb5SndsHmi1c7ynTdDMNXebFTWfSklgQdlUqRdC218qPSAXMuDUauVrB3NY9g$ >> >> IMPORTANT: if you fix the bug, please add the following tag to the commit: >> Reported-by: syzbot+274094e62023782eeb17@syzkaller.appspotmail.com >> >> batman_adv: batadv0: Interface activated: batadv_slave_1 >> infiniband syz1: set active >> infiniband syz1: added vlan0 >> general protection fault, probably for non-canonical address 0xdffffc0000000086: 0000 [#1] PREEMPT SMP KASAN >> KASAN: null-ptr-deref in range [0x0000000000000430-0x0000000000000437] >> CPU: 0 PID: 8852 Comm: syz-executor043 Not tainted 5.6.0-rc2-syzkaller #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 >> RIP: 0010:dev_to_node include/linux/device.h:663 [inline] >> RIP: 0010:rds_ib_add_one+0x81/0xe50 net/rds/ib.c:140 >> Code: b7 a8 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 0e e4 1d fa bb 30 04 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 f0 0a 00 00 8b 1b 48 c7 c0 28 0c 09 89 48 >> RSP: 0018:ffffc90003087298 EFLAGS: 00010202 >> RAX: 0000000000000086 RBX: 0000000000000430 RCX: 0000000000000000 >> RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 >> RBP: ffffc900030872f0 R08: ffffffff87964c3c R09: ffffed1014fd109c >> R10: ffffed1014fd109c R11: 0000000000000000 R12: 0000000000000000 >> R13: dffffc0000000000 R14: ffff8880a7e886a8 R15: ffff8880a7e88000 >> FS: 0000000000c3d880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 00007f0318ed0000 CR3: 00000000a3167000 CR4: 00000000001406f0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >> Call Trace: >> add_client_context+0x482/0x660 drivers/infiniband/core/device.c:681 >> enable_device_and_get+0x15b/0x370 drivers/infiniband/core/device.c:1316 >> ib_register_device+0x124d/0x15b0 drivers/infiniband/core/device.c:1382 >> rxe_register_device+0x3f6/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:1231 >> rxe_add+0x1373/0x14f0 drivers/infiniband/sw/rxe/rxe.c:302 >> rxe_net_add+0x79/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:539 >> rxe_newlink+0x31/0x90 drivers/infiniband/sw/rxe/rxe.c:318 >> nldev_newlink+0x403/0x4a0 drivers/infiniband/core/nldev.c:1538 >> rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline] >> rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] >> rdma_nl_rcv+0x701/0xa20 drivers/infiniband/core/netlink.c:259 >> netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] >> netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1328 >> netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1917 >> sock_sendmsg_nosec net/socket.c:652 [inline] >> sock_sendmsg net/socket.c:672 [inline] >> ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 >> ___sys_sendmsg net/socket.c:2397 [inline] >> __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 >> __do_sys_sendmsg net/socket.c:2439 [inline] >> __se_sys_sendmsg net/socket.c:2437 [inline] >> __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 >> do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 >> entry_SYSCALL_64_after_hwframe+0x49/0xbe > > Fall back to NUMA_NO_NODE if needed. > > --- a/net/rds/ib.c > +++ b/net/rds/ib.c > @@ -137,7 +137,8 @@ static void rds_ib_add_one(struct ib_dev > return; > > rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL, > - ibdev_to_node(device)); > + device->dev.parent ? > + ibdev_to_node(device) : NUMA_NO_NODE); > if (!rds_ibdev) > return; > > This seems good. Can you please post it as properly formatted patch ?