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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Trying to unmap invalid handle! pending_idx: @ drivers/net/xen-netback/netback.c:998 causes kernel panic/reboot
Hi! On 14/07/14 13:54, Zoltan Kiss wrote: Hi, Based on the stack trace I think the guest sends packet with more than MAX_SKB_SLOTS slots, and one slot's grant mapping operation goes wrong. Then the error handling screws up the internal bookkeeping of pending slots, and tries to unmap something that is not mapped. Unfortunately it is quite complicated to emulate grant mapping failures in a predictable way. Armin, if we provide some patches (hopefully with a solution, but at least with some additional logging), would you be able to compile and verify it? I can compile and install it, the verification may take a few days. We're building up a test system, and try to test with outgoing traffic. If you have any advice, about how to test the new kernel, please share with me (I mean large pps, or large bandwidth is the better, or try to update/downgrade the GPLPV drivers to a specific version). I'm setting the loglevel to DBG. Regards, Zoltan Kiss On 14/07/14 03:25, Armin Zentai wrote:Jul 13 00:46:58 node11 [157060.106323] vif vif-2-0 h14z4mzbvfrrhb: Trying to unmap invalid handle! pending_idx: c Jul 13 00:46:58 node11 [157060.106476] ------------[ cut here ]------------ Jul 13 00:46:58 node11 [157060.106546] kernel BUG at drivers/net/xen-netback/netback.c:998! Jul 13 00:46:58 node11 [157060.106616] invalid opcode: 0000 [#1]Jul 13 00:46:58 node11 [157060.112705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G E 3.15.4 #1 Jul 13 00:46:58 node11 [157060.112776] Hardware name: Supermicro X8DTL/X8DTL, BIOS 1.1b 03/19/2010 Jul 13 00:46:58 node11 [157060.112848] task: ffffffff81c1b480 ti: ffffffff81c00000 task.ti: ffffffff81c00000 Jul 13 00:46:58 node11 [157060.112936] RIP: e030:[<ffffffffa025f61d>] Jul 13 00:46:58 node11 [<ffffffffa025f61d>] xenvif_idx_unmap+0x11d/0x130 [xen_netback] Jul 13 00:46:58 node11 [157060.113078] RSP: e02b:ffff88008ea03d48 EFLAGS: 00010292 Jul 13 00:46:58 node11 [157060.113147] RAX: 000000000000004a RBX: 000000000000000c RCX: 0000000000000000 Jul 13 00:46:58 node11 [157060.113234] RDX: ffff88008a40b600 RSI: ffff88008ea03a18 RDI: 000000000000021b Jul 13 00:46:58 node11 [157060.113321] RBP: ffff88008ea03d88 R08: 0000000000000000 R09: ffff88008a40b600 Jul 13 00:46:58 node11 [157060.113408] R10: ffff88008a0004e8 R11: 00000000000006d8 R12: ffff8800569708c0 Jul 13 00:46:58 node11 [157060.113495] R13: ffff88006558fec0 R14: ffff8800569708c0 R15: 0000000000000001 Jul 13 00:46:58 node11 [157060.113589] FS: 00007f351684b700(0000) GS:ffff88008ea00000(0000) knlGS:0000000000000000 Jul 13 00:46:58 node11 [157060.113679] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b Jul 13 00:46:58 node11 [157060.113747] CR2: 00007fc2a4372000 CR3: 00000000049f3000 CR4: 0000000000002660 Jul 13 00:46:58 node11 [157060.113835] Stack: Jul 13 00:46:58 node11 [157060.113896] ffff880056979f90 Jul 13 00:46:58 node11 ff00000000000001 Jul 13 00:46:58 node11 ffff880b0605e000 Jul 13 00:46:58 node11 0000000000000000 Jul 13 00:46:58 node11 Jul 13 00:46:58 node11 [157060.114143] ffff0000ffffffff Jul 13 00:46:58 node11 00000000fffffff6 Jul 13 00:46:58 node11 0000000000000001 Jul 13 00:46:58 node11 ffff8800569769d0 Jul 13 00:46:58 node11 Jul 13 00:46:58 node11 [157060.114390] ffff88008ea03e58 Jul 13 00:46:58 node11 ffffffffa02622fc Jul 13 00:46:58 node11 ffff88008ea03dd8 Jul 13 00:46:58 node11 ffffffff810b5223 Jul 13 00:46:58 node11 Jul 13 00:46:58 node11 [157060.114637] Call Trace: Jul 13 00:46:58 node11 [157060.114700] <IRQ> Jul 13 00:46:58 node11 Jul 13 00:46:58 node11 [157060.114750] Jul 13 00:46:58 node11 [<ffffffffa02622fc>] xenvif_tx_action+0x27c/0x7f0 [xen_netback] Jul 13 00:46:58 node11 [157060.114927] [<ffffffff810b5223>] ? __wake_up+0x53/0x70 Jul 13 00:46:58 node11 [157060.114998] [<ffffffff810ca077>] ? handle_irq_event_percpu+0xa7/0x1b0 Jul 13 00:46:58 node11 [157060.115073] [<ffffffffa02647d1>] xenvif_poll+0x31/0x64 [xen_netback] Jul 13 00:46:58 node11 [157060.115147] [<ffffffff81653d4b>] net_rx_action+0x10b/0x290 Jul 13 00:46:58 node11 [157060.115221] [<ffffffff81071c73>] __do_softirq+0x103/0x320 Jul 13 00:46:58 node11 [157060.115292] [<ffffffff81072015>] irq_exit+0x135/0x140 Jul 13 00:46:58 node11 [157060.115363] [<ffffffff8144759c>] xen_evtchn_do_upcall+0x3c/0x50 Jul 13 00:46:58 node11 [157060.115436] [<ffffffff8175c07e>] xen_do_hypervisor_callback+0x1e/0x30 Jul 13 00:46:58 node11 [157060.115506] <EOI> Jul 13 00:46:58 node11 Jul 13 00:46:58 node11 [157060.115551] Jul 13 00:46:58 node11 [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20 Jul 13 00:46:58 node11 [157060.115722] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20 Jul 13 00:46:58 node11 [157060.115794] [<ffffffff8100a200>] ? xen_safe_halt+0x10/0x20 Jul 13 00:46:58 node11 [157060.115869] [<ffffffff8101dbbf>] ? default_idle+0x1f/0xc0 Jul 13 00:46:58 node11 [157060.115939] [<ffffffff8101d38f>] ? arch_cpu_idle+0xf/0x20 Jul 13 00:46:58 node11 [157060.116009] [<ffffffff810b5aa1>] ? cpu_startup_entry+0x201/0x360 Jul 13 00:46:58 node11 [157060.116084] [<ffffffff817420a7>] ? rest_init+0x77/0x80 Jul 13 00:46:58 node11 [157060.116156] [<ffffffff81d3a156>] ? start_kernel+0x406/0x413 Jul 13 00:46:58 node11 [157060.116227] [<ffffffff81d39b6e>] ? repair_env_string+0x5b/0x5b Jul 13 00:46:58 node11 [157060.116298] [<ffffffff81d39603>] ? x86_64_start_reservations+0x2a/0x2c Jul 13 00:46:58 node11 [157060.116373] [<ffffffff81d3d5dc>] ? xen_start_kernel+0x584/0x586 Thanks, - Armin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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