Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755843AbbDNPV6 (ORCPT ); Tue, 14 Apr 2015 11:21:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57844 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753922AbbDNPVs (ORCPT ); Tue, 14 Apr 2015 11:21:48 -0400 From: Honggang Li To: roland@kernel.org, sean.hefty@intel.com, hal.rosenstock@gmail.com, kaber@trash.net, davem@davemloft.net, alex.estrin@intel.com, dledford@redhat.com, edumazet@google.com, erezsh@mellanox.com, nicolas.dichtel@6wind.com, maheshb@google.com, jbenc@redhat.com, ebiederm@xmission.com, elfring@users.sourceforge.net, f.fainelli@gmail.com, linux@roeck-us.net, andrew@lunn.ch, sfeldma@gmail.com, alexander.h.duyck@intel.com, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: Honggang Li Subject: [PATCH linux-next 1/4] infiniband/ipoib: fix possible NULL pointer dereference in ipoib_get_iflink Date: Tue, 14 Apr 2015 23:20:14 +0800 Message-Id: <1429024817-21561-2-git-send-email-honli@redhat.com> In-Reply-To: <1429024817-21561-1-git-send-email-honli@redhat.com> References: <1429024817-21561-1-git-send-email-honli@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4995 Lines: 107 Starting monitoring for VG vg_rdma01: 3 logical volume(s) in volume group "vg_rdma01" monitored [ OK ] Starting cgconfig service: Failed to parse /etc/cgconfig.conf or /etc/cgconfig.d[FAILED] Loading OpenIB kernel modules: BUG: unable to handle kernel NULL pointer dereference at 0000000000000120 IP: [] ipoib_get_iflink+0x10/0x20 [ib_ipoib] PGD 475540067 PUD 473541067 PMD 0 Oops: 0000 [#1] SMP Modules linked in: ib_ipoib(+) rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm ib_sa vhost_net macvtap macvlan vhost tun ipmi_devintf sg ipmi_si ipmi_msghandler serio_raw iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii bnx2 intel_powerclamp coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 microcode pcspkr i2c_i801 i2c_core lpc_ich mfd_core acpi_cpufreq ioatdma i7core_edac edac_core shpchp ext4(E) jbd2(E) mbcache(E) sd_mod(E) megaraid_sas(E) pata_acpi(E) ata_generic(E) ata_piix(E) iw_cxgb3(E) cxgb3(E) mdio(E) ib_qib(E) dca(E) ib_mad(E) iw_cxgb4(E) iw_cm(E) ib_core(E) ib_addr(E) ipv6(E) cxgb4(E) dm_mirror(E) dm_region_hash(E) dm_log(E) dm_mod(E) CPU: 6 PID: 2405 Comm: modprobe Tainted: G E 4.0.0-next-20150413 #1 Hardware name: IBM System x3650 M3 -[7945O63]-/00D4062, BIOS -[D6E157AUS-1.15]- 06/13/2012 task: ffff880476ad6f00 ti: ffff88047579c000 task.ti: ffff88047579c000 RIP: 0010:[] [] ipoib_get_iflink+0x10/0x20 [ib_ipoib] RSP: 0018:ffff88047579f9b8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff880476e2a000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffff88047579fbb8 RDI: ffff880476e2a000 RBP: ffff88047579f9b8 R08: 0000000000000660 R09: ffff88047404f068 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8804736bec00 R13: ffff88047579fbb4 R14: ffff88047404f000 R15: 0000000000000009 FS: 00007fc047a2e700(0000) GS:ffff88047fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000120 CR3: 000000047541f000 CR4: 00000000000006e0 Stack: ffff88047579f9c8 ffffffff814fbfa3 ffff88047579fbe8 ffffffff81515a15 0000000000000005 ffff880476e2a280 0000000000000005 0000000000000014 ffff88047579fa48 ffffffff8150a577 0000000000000000 ffff8804ffffffff Call Trace: [] dev_get_iflink+0x23/0x40 [] rtnl_fill_ifinfo+0x255/0xce0 [] ? __hw_addr_create_ex+0x97/0xc0 [] ? _raw_spin_unlock_bh+0x1b/0x20 [] ? __dev_mc_add+0x75/0x90 [] ? igmp6_group_added+0x5c/0x130 [ipv6] [] ? __kmalloc_node_track_caller+0x3c/0x50 [] ? __kmalloc_reserve+0x3b/0xa0 [] ? __alloc_skb+0xa8/0x1f0 [] rtmsg_ifinfo_build_skb+0x83/0xe0 [] ? raw_notifier_call_chain+0x16/0x20 [] rtmsg_ifinfo+0x21/0x40 [] register_netdevice+0x38f/0x400 [] register_netdev+0x1e/0x30 [] ipoib_add_port.clone.0+0x214/0x390 [ib_ipoib] [] ipoib_add_one+0xc7/0x110 [ib_ipoib] [] ib_register_client+0x7d/0xa0 [ib_core] [] ? 0xffffffffa06ce000 [] ipoib_init_module+0xf2/0x13c [ib_ipoib] [] do_one_initcall+0xb7/0x1d0 [] do_init_module+0x69/0x200 [] load_module+0x5b5/0x730 [] ? mod_sysfs_teardown+0x150/0x150 [] ? __vmalloc+0x22/0x30 [] ? module_sect_show+0x30/0x30 [] SyS_init_module+0x94/0xc0 [] system_call_fastpath+0x12/0x6a Code: 66 66 66 90 b9 1e 00 00 00 48 89 f0 48 8d 77 08 48 89 c7 f3 48 a5 c9 c3 0f 1f 00 55 48 89 e5 66 66 66 66 90 48 8b 87 e8 13 00 00 <8b> 80 20 01 00 00 c9 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 RIP [] ipoib_get_iflink+0x10/0x20 [ib_ipoib] RSP CR2: 0000000000000120 ---[ end trace a8610f6e9640eb85 ]--- Signed-off-by: Honggang Li --- drivers/infiniband/ulp/ipoib/ipoib_main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 657b89b..11ea6e2 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -846,7 +846,10 @@ static int ipoib_get_iflink(const struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); - return priv->parent->ifindex; + if (priv && priv->parent) + return priv->parent->ifindex; + else + return 0; } static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/