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Date: Sun, 20 Mar 2011 21:17:48 +0100 From: Nicolas de Pesloüan <nicolas.2p.debian@...il.com> To: Jiri Pirko <jpirko@...hat.com> CC: Jay Vosburgh <fubar@...ibm.com>, Andy Gospodarek <andy@...yhouse.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: oops / kernel panic in bonding. Hi Jiri, I suspect we have a race condition somewhere in the new bond_handle_frame function: The following commands produce one of the following errors: modprobe bonding max_bonds=0 echo +bond0>/sys/class/net/bonding_masters echo +bond1>/sys/class/net/bonding_masters echo +eth1>/sys/class/net/bond1/bonding/slaves This is mostly reproducible, under VirtualBox. All tests done with 08351fc6a75731226e1112fc7254542bd3a2912e at the top commit (current net-next-2.6). Nicolas. First try: [ 42.478455] BUG: unable to handle kernel NULL pointer dereference at 0000000000000280 [ 42.480035] IP: [<ffffffffa040c9b0>] bond_handle_frame+0x1f/0x138 [bonding] [ 42.480035] PGD 0 [ 42.480035] Oops: 0000 [#1] SMP [ 42.480035] last sysfs file: /sys/devices/virtual/net/bond1/bonding/slaves [ 42.480035] CPU 0 [ 42.480035] Modules linked in: bonding loop snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer tpm_tis tpm snd psmouse tpm_bios parport_pc processor evdev pcspkr parport battery i2c_piix4 serio_raw ac i2c_core button thermal_sys soundcore snd_page_alloc ext3 jbd mbcache ide_gd_mod ide_cd_mod cdrom ata_generic ata_piix libata scsi_mod ohci_hcd piix ide_core floppy ehci_hcd usbcore e1000 nls_base [last unloaded: scsi_wait_scan] [ 42.480035] [ 42.480035] Pid: 206, comm: udevd Not tainted 2.6.38+ #5 innotek GmbH VirtualBox [ 42.480035] RIP: 0010:[<ffffffffa040c9b0>] [<ffffffffa040c9b0>] bond_handle_frame+0x1f/0x138 [bonding] [ 42.480035] RSP: 0018:ffff88003fc03c20 EFLAGS: 00010282 [ 42.480035] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88002ecb0608 [ 42.480035] RDX: ffff880023392600 RSI: ffff880023392600 RDI: ffff880023392600 [ 42.480035] RBP: ffffffffa040c991 R08: ffff880023392600 R09: 00000000ffffffff [ 42.480035] R10: ffff88002322c740 R11: dead000000200200 R12: ffff88002ec0ea00 [ 42.480035] R13: ffff88003fc03c58 R14: 0000000000000000 R15: 0000000000000001 [ 42.480035] FS: 00007fbab75c57a0(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000 [ 42.480035] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 42.480035] CR2: 0000000000000280 CR3: 000000003defd000 CR4: 00000000000006f0 [ 42.480035] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.480035] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 42.480035] Process udevd (pid: 206, threadinfo ffff880030066000, task ffff8800231c5040) [ 42.480035] Stack: [ 42.480035] 00000000ffffffff 0000000000000000 ffffffffa040c991 ffff88002322c000 [ 42.480035] ffff88003fc03c68 ffffffff81267192 0000000000000000 ffff880023392600 [ 42.480035] 0000000000000080 [ 42.524186] bonding: bond1: enslaving eth1 as an active interface with an up link. Another try: [ 308.145200] BUG: unable to handle kernel NULL pointer dereference at 0000000000000280 [ 308.146140] IP: [<ffffffffa042c9b0>] bond_handle_frame+0x1f/0x138 [bonding] [ 308.146993] PGD 0 [ 308.147249] Oops: 0000 [#1] SMP [ 308.147669] last sysfs file: /sys/devices/virtual/net/bond0/uevent [ 308.148024] CPU 0 [ 308.148024] Modules linked in: bonding loop snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer psmouse tpm_tis snd tpm tpm_bios serio_raw parport_pc i2c_piix4 pcspkr soundcore processor evdev snd_page_alloc i2c_core parport battery ac button thermal_sys ext3 jbd mbcache ide_cd_mod ide_gd_mod cdrom ata_generic ata_piix libata scsi_mod ohci_hcd piix ide_core ehci_hcd usbcore floppy e1000 nls_base [last unloaded: bonding] [ 308.148024] [ 308.148024] Pid: 1291, comm: udevd Not tainted 2.6.38+ #5 innotek GmbH VirtualBox [ 308.165445] RIP: 0010:[<ffffffffa042c9b0>] [<ffffffffa042c9b0>] bond_handle_frame+0x1f/0x138 [bonding] [ 308.165445] RSP: 0000:ffff88003fc03c20 EFLAGS: 00010282 [ 308.165445] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000148 [ 308.165445] RDX: ffff880023246000 RSI: ffff880023246000 RDI: ffff880023246000 [ 308.165445] RBP: ffffffffa042c991 R08: ffff880023246000 R09: 0000000000000000 [ 308.165445] R10: ffff88002ee2e740 R11: ffffffff81051a61 R12: ffff880039e50800 [ 308.165445] R13: ffff88003fc03c58 R14: 0000000000000000 R15: 0000000000000001 [ 308.165445] FS: 00007f1f30e837a0(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000 [ 308.165445] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 308.165445] CR2: 0000000000000280 CR3: 000000002e582000 CR4: 00000000000006f0 [ 308.165445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 308.165445] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 308.165445] Process udevd (pid: 1291, threadinfo ffff88002eea0000, task ffff88002f808d60) [ 308.165445] Stack: [ 308.165445] ffff88002f80eb00 0000000000000000 ffffffffa042c991 ffff88002ee2e000 [ 308.165445] ffff88003fc03c68 ffffffff81267192 ffffffff810345f4 ffff880023246000 [ 308.165445] 0000000000000000 ffffffff81679c20 ffff880023246000 ffff880023246000 [ 308.165445] Call Trace: [ 308.165445] <IRQ> [ 308.165445] [<ffffffffa042c991>] ? bond_handle_frame+0x0/0x138 [bonding] [ 308.165445] [<ffffffff81267192>] ? __netif_receive_skb+0x2f9/0x4c5 [ 308.165445] [<ffffffff810345f4>] ? __wake_up_common+0x41/0x78 [ 308.165445] [<ffffffff81267656>] ? netif_receive_skb+0x67/0x6d [ 308.165445] [<ffffffff81267b5d>] ? napi_gro_receive+0x1f/0x2d [ 308.165445] [<ffffffff8126772b>] ? napi_skb_finish+0x1c/0x31 [ 308.165445] [<ffffffffa000b25c>] ? e1000_clean_rx_irq+0x2fd/0x3b0 [e1000] [ 308.165445] [<ffffffffa000ab46>] ? e1000_clean+0x30f/0x490 [e1000] [ 308.165445] [<ffffffff81020bf6>] ? ack_apic_level+0x6e/0x134 [ 308.165445] [<ffffffff81091a7f>] ? handle_fasteoi_irq+0x9c/0xb4 [ 308.165445] [<ffffffff8104aa01>] ? irq_exit+0x6e/0xa0 [ 308.165445] [<ffffffff81267c8a>] ? net_rx_action+0xa8/0x206 [ 308.165445] [<ffffffff8104abf3>] ? __do_softirq+0xc3/0x19e [ 308.165445] [<ffffffff8108f6d0>] ? handle_irq_event_percpu+0x171/0x18f [ 308.165445] [<ffffffff8104ac6b>] ? __do_softirq+0x13b/0x19e [ 308.165445] [<ffffffff81323edc>] ? call_softirq+0x1c/0x30 [ 308.165445] [<ffffffff8100aa53>] ? do_softirq+0x3f/0x79 [ 308.165445] [<ffffffff8104a9d2>] ? irq_exit+0x3f/0xa0 [ 308.165445] [<ffffffff8100a39f>] ? do_IRQ+0x94/0xaa [ 308.165445] [<ffffffff8131cbd3>] ? ret_from_intr+0x0/0x15 [ 308.165445] <EOI> [ 308.165445] [<ffffffff810da903>] ? ptep_clear_flush+0x17/0x34 [ 308.165445] [<ffffffff810cb8ba>] ? copy_user_highpage+0x27/0x40 [ 308.165445] [<ffffffff810cf45c>] ? do_wp_page+0x5c1/0x689 [ 308.165445] [<ffffffff810d0155>] ? handle_pte_fault+0x8a5/0x8f2 [ 308.165445] [<ffffffff810d02c4>] ? handle_mm_fault+0x122/0x18b [ 308.165445] [<ffffffff8131f9b7>] ? do_page_fault+0x32a/0x34c [ 308.165445] [<ffffffff8131ce95>] ? page_fault+0x25/0x30 [ 308.165445] [<ffffffff81199b0d>] ? __put_user_4+0x1d/0x30 [ 308.165445] [<ffffffff8131ce95>] ? page_fault+0x25/0x30 [ 308.165445] Code: e8 ed fc e2 e0 5a 48 89 d8 5b 5d c3 41 55 49 89 fd 41 54 55 53 48 83 ec 08 48 8b 3f 48 8b 47 20 4c 8b a0 f0 02 00 00 49 8b 04 24 [ 308.165445] 8b a8 80 02 00 00 b8 03 00 00 00 48 85 ed 0f 84 fc 00 00 00 [ 308.165445] RIP [<ffffffffa042c9b0>] bond_handle_frame+0x1f/0x138 [bonding] [ 308.165445] RSP <ffff88003fc03c20> [ 308.165445] CR2: 0000000000000280 [ 308.246179] ---[ end trace 31773bac6ab820b4 ]--- [ 308.246897] Kernel panic - not syncing: Fatal exception in interrupt [ 308.248076] Pid: 1291, comm: udevd Tainted: G D 2.6.38+ #5 [ 308.249089] Call Trace: [ 308.249496] <IRQ> [<ffffffff8131abe8>] ? panic+0x92/0x197 [ 308.250396] [<ffffffff810457a5>] ? kmsg_dump+0x41/0xe3 [ 308.251211] [<ffffffff8131d9a6>] ? oops_end+0xa9/0xb6 [ 308.252077] [<ffffffff8102c9ff>] ? no_context+0x1f4/0x201 [ 308.252967] [<ffffffffa000a7ed>] ? e1000_xmit_frame+0xa5b/0xaa5 [e1000] [ 308.254014] [<ffffffff8131f83c>] ? do_page_fault+0x1af/0x34c [ 308.254915] [<ffffffff81264479>] ? dev_hard_start_xmit+0x3de/0x53c [ 308.256937] [<ffffffffa042c991>] ? bond_handle_frame+0x0/0x138 [bonding] [ 308.258683] [<ffffffff8131ce95>] ? page_fault+0x25/0x30 [ 308.260431] [<ffffffffa042c991>] ? bond_handle_frame+0x0/0x138 [bonding] [ 308.262420] [<ffffffff81051a61>] ? __mod_timer+0x145/0x157 [ 308.264009] [<ffffffffa042c9b0>] ? bond_handle_frame+0x1f/0x138 [bonding] [ 308.265944] [<ffffffffa042c991>] ? bond_handle_frame+0x0/0x138 [bonding] [ 308.267404] bonding: bond1: enslaving eth1 as an active interface with an up link. [ 308.269896] [<ffffffff81267192>] ? __netif_receive_skb+0x2f9/0x4c5 [ 308.271792] [<ffffffff810345f4>] ? __wake_up_common+0x41/0x78 [ 308.271795] [<ffffffff81267656>] ? netif_receive_skb+0x67/0x6d [ 308.271797] [<ffffffff81267b5d>] ? napi_gro_receive+0x1f/0x2d [ 308.271799] [<ffffffff8126772b>] ? napi_skb_finish+0x1c/0x31 [ 308.271811] [<ffffffffa000b25c>] ? e1000_clean_rx_irq+0x2fd/0x3b0 [e1000] [ 308.271815] [<ffffffffa000ab46>] ? e1000_clean+0x30f/0x490 [e1000] [ 308.271819] [<ffffffff81020bf6>] ? ack_apic_level+0x6e/0x134 [ 308.271822] [<ffffffff81091a7f>] ? handle_fasteoi_irq+0x9c/0xb4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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