[Bug 1763454] [NEW] bpf_map_lookup_elem: BUG: unable to handle kernel paging request
Public bug reported: Hey, we are currently debugging an issue with Scope [1] where the initialization of the used tcptracer-bpf [2] leads to a kernel oops at the first call of `bpf_map_lookup_elem`. The OS is Ubuntu Xenial with kernel version `Ubuntu 4.4.0-119.143-generic 4.4.114`. `4.4.0-116.140` does not show the problem. Example: ``` [ 58.763045] BUG: unable to handle kernel paging request at 3c0c41a8 [ 58.846450] IP: [] bpf_map_lookup_elem+0x6/0x20 [ 58.909436] PGD 80003be04067 PUD 3bea1067 PMD 0 [ 58.914876] Oops: [#1] SMP [ 58.915581] Modules linked in: ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables xt_conntrack x_tables nf_nat nf_conntrack br_netfilter bridge stp llc overlay vboxsf isofs ppdev crct10dif_pclmul crc32_pclmul ghash_clmulni_intel vboxguest input_leds serio_raw parport_pc parport video ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear mptspi aesni_intel scsi_transport_spi mptscsih aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd mptbase psmouse e1000 [ 59.678145] CPU: 1 PID: 1810 Comm: scope Not tainted 4.4.0-119-generic #143-Ubuntu [ 59.790501] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 59.846405] task: 88003ae23800 ti: 880022c84000 task.ti: 880022c84000 [ 60.000524] RIP: 0010:[] [] bpf_map_lookup_elem+0x6/0x20 [ 60.178029] RSP: 0018:880022c87960 EFLAGS: 00010082 [ 60.257957] RAX: 8117cd70 RBX: c922f090 RCX: [ 60.350704] RDX: RSI: 880022c87ba8 RDI: 3c0c4180 [ 60.449182] RBP: 880022c87be8 R08: R09: 0800 [ 60.547638] R10: 88003ae23800 R11: 88003ca12e10 R12: [ 60.570757] R13: 88003c601200 R14: 88003fd10020 R15: 880022c87d10 [ 60.678811] FS: 7f95ba372700() GS:88003fd0() knlGS: [ 60.778636] CS: 0010 DS: ES: CR0: 80050033 [ 60.866380] CR2: 3c0c41a8 CR3: 3aeae000 CR4: 00060670 [ 60.963736] DR0: DR1: DR2: [ 61.069195] DR3: DR6: fffe0ff0 DR7: 0400 [ 61.187006] Stack: [ 61.189256] 880022c87be8 81177411 0001 [ 61.253133] 3c0c4180 880022c87ba8 [ 61.345334] 880022c87d10 0001 [ 61.459069] Call Trace: [ 61.505273] [] ? __bpf_prog_run+0x7a1/0x1360 [ 61.625511] [] ? update_curr+0x79/0x170 [ 61.741423] [] ? update_cfs_shares+0xbc/0x100 [ 61.837892] [] ? __schedule+0x30d/0x7f0 [ 61.941349] [] ? __schedule+0x301/0x7f0 [ 62.073874] [] ? __schedule+0x30d/0x7f0 [ 62.185260] [] ? __schedule+0x301/0x7f0 [ 62.186239] [] ? __schedule+0x30d/0x7f0 [ 62.305193] [] ? __schedule+0x301/0x7f0 [ 62.399854] [] ? __schedule+0x30d/0x7f0 [ 62.406219] [] ? __schedule+0x301/0x7f0 [ 62.407994] [] ? __schedule+0x30d/0x7f0 [ 62.410491] [] ? __schedule+0x301/0x7f0 [ 62.431220] [] ? __schedule+0x30d/0x7f0 [ 62.497078] [] ? __schedule+0x30d/0x7f0 [ 62.559245] [] ? __schedule+0x301/0x7f0 [ 62.661493] [] ? __schedule+0x30d/0x7f0 [ 62.712927] [] ? __schedule+0x301/0x7f0 [ 62.799216] [] trace_call_bpf+0x37/0x50 [ 62.881570] [] kprobe_perf_func+0x37/0x250 [ 62.977365] [] ? finish_task_switch+0x76/0x230 [ 62.981405] [] ? __raw_callee_save___pv_queued_spin_unlock+0x11/0x20 [ 63.092978] [] kprobe_dispatcher+0x31/0x50 [ 63.184696] [] ? tcp_close+0x1/0x440 [ 63.260350] [] kprobe_ftrace_handler+0xb6/0x120 [ 63.275694] [] ? tcp_close+0x5/0x440 [ 63.278202] [] ftrace_ops_recurs_func+0x58/0xb0 [ 63.289826] [] 0xc00050d5 [ 63.291573] [] ? tcp_check_oom+0x150/0x150 [ 63.299743] [] ? tcp_close+0x1/0x440 [ 63.301658] [] tcp_close+0x5/0x440 [ 63.340651] [] inet_release+0x42/0x70 [ 63.440655] [] ? tcp_close+0x5/0x440 [ 63.549368] [] ? inet_release+0x42/0x70 [ 63.655199] [] inet6_release+0x30/0x40 [ 63.657005] [] sock_release+0x25/0x80 [ 63.658693] [] sock_close+0x12/0x20 [ 63.660735] [] __fput+0xe7/0x230 [ 63.662210] [] fput+0xe/0x10 [ 63.664371] [] task_work_run+0x86/0xb0 [ 63.667217] [] exit_to_usermode_loop+0xc2/0xd0 [ 63.669889] [] syscall_return_slowpath+0x4e/0x60 [ 63.673627] [] int_ret_from_sys_call+0x25/0x9f [ 63.704763] Code: 41 be 01 00 00 00 e8 fa bd ff ff 49 89 c5 eb 94 e8 f0 14 0a 00 4c 89 eb e9 e2 fe ff ff e8 a3 60 f0 ff 0f 1f 00 0f 1f 44 00 00 55 <48> 8b 47 28 48 89 e5 48 8b 40 18 e8
[Bug 1763454] Re: bpf_map_lookup_elem: BUG: unable to handle kernel paging request
`Ubuntu 4.4.0-119.143+lp1763454v201804121433-generic 4.4.114` does fix the problem for us. Tested with Scope e2b4b3edf63a62836ca27024003cc38aa6b9c0b5 Thanks Seth! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763454 Title: bpf_map_lookup_elem: BUG: unable to handle kernel paging request To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1763454] Re: bpf_map_lookup_elem: BUG: unable to handle kernel paging request
Seth, can you give an ETA for when the update with the fix will be published? If it's only a matter of a few days, adding a workaround might not be necessary.. (https://github.com/weaveworks/scope/pull/3141#discussion_r181340479) Thanks again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763454 Title: bpf_map_lookup_elem: BUG: unable to handle kernel paging request To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1763454] Re: bpf_map_lookup_elem: BUG: unable to handle kernel paging request
Ubuntu 4.4.0-123.147-generic 4.4.128 does fix it for us as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763454 Title: bpf_map_lookup_elem: BUG: unable to handle kernel paging request To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 763148] Re: Adding/Removing an external monitor causes open windows to move to another workspace
Problem still exists. compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 unity 7.2.3+14.04.20140826-0ubuntu1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/763148 Title: Adding/Removing an external monitor causes open windows to move to another workspace To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/763148/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
