[Kernel-packages] [Bug 1748342] Re: cgroup: remove cgroup directory leading kernel crash in kill_css
** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: Incomplete => Triaged ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Status: New => Triaged ** Changed in: linux (Ubuntu Xenial) Importance: Undecided => High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1748342 Title: cgroup: remove cgroup directory leading kernel crash in kill_css Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Triaged Bug description: We got feedback from customer that cvm(cloud virtual machine) crashed when using kubelet updating container-service in ubuntu xenial. Logs show as follow. We find a patch (commit 33c35aa4817864e056fd772230b0c6b552e36ea2) in linux mainline, which can indeed fix this bug. But ubuntu-xenial.git has not merged it yet. Do you guys have a plan for merging? --panic log- [2018-02-02 10:21:48][4397731.721563] BUG: unable to handle kernel paging request at 0001005c [2018-02-02 10:40:50][4397731.722666] IP: css_clear_dir+0x5/0x70 [2018-02-02 10:40:50][4397731.723261] PGD a12b067 [2018-02-02 10:40:50][4397731.723261] PUD 0 [2018-02-02 10:40:50][4397731.723628] [2018-02-02 10:40:50][4397731.724004] Oops: [#1] SMP [2018-02-02 10:40:50][4397731.724004] Modules linked in: xt_statistic nf_conntrack_netlink ebt_ip ebtable_filter ebtables veth xt_set ip_set_hash_net ip_set nfnetlink xt_nat xt_recent xt_mark ipt_REJ[2018-02-02 10:40:50]ECT nf_reject_ipv4 xt_tcpudp xt_comment ipt_MASQUERADE nf_nat_masquerade_ipv4 xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_fil[2018-02-02 10:40:50]ter ip_tables xt_conntrack x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs ppdev sb_edac edac_core crct10dif_pclmul crc32_pclmul ghash_clmulni_intel joydev input_le[2018-02-02 10:40:50]ds serio_raw parport_pc parport i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 a[2018-02-02 10:40:50]sync_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath [2018-02-02 10:40:50][4397731.724004] linear cirrus ttm drm_kms_helper syscopyarea sysfillrect sysimgblt aesni_intel fb_sys_fops aes_x86_64 crypto_simd cryptd glue_helper psmouse virtio_blk virtio_n[2018-02-02 10:40:50]et drm pata_acpi floppy [2018-02-02 10:40:50][4397731.724004] CPU: 0 PID: 23347 Comm: kubelet Not tainted 4.10.0-32-generic #36~16.04.1-Ubuntu [2018-02-02 10:40:50][4397731.724004] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [2018-02-02 10:40:50][4397731.724004] task: 92abde59 task.stack: baa94165c000 [2018-02-02 10:40:50][4397731.724004] RIP: 0010:css_clear_dir+0x5/0x70 [2018-02-02 10:40:50][4397731.724004] RSP: 0018:baa94165fe10 EFLAGS: 00010206 [2018-02-02 10:40:50][4397731.724004] RAX: 47fd40005d7b RBX: ffe8 RCX: 92abffc0fcec [2018-02-02 10:40:50][4397731.724004] RDX: 9b070800 RSI: 0206 RDI: ffe8 [2018-02-02 10:40:50][4397731.724004] RBP: baa94165fe20 R08: c8b18701 R09: 000180220017 [2018-02-02 10:40:50][4397731.724004] R10: 92abc8b187f8 R11: 92abf7751d00 R12: 92abd5601000 [2018-02-02 10:40:50][4397731.724004] R13: R14: 92abd5601150 R15: [2018-02-02 10:40:50][4397731.724004] FS: 7f6f92ffd700() GS:92abffc0() knlGS: [2018-02-02 10:40:50][4397731.724004] CS: 0010 DS: ES: CR0: 80050033 [2018-02-02 10:40:50][4397731.724004] CR2: 0001005c CR3: 280cb000 CR4: 000406f0 [2018-02-02 10:40:50][4397731.724004] Call Trace: [2018-02-02 10:40:50][4397731.724004] ? kill_css+0x12/0x60 [2018-02-02 10:40:50][4397731.724004] cgroup_destroy_locked+0xa5/0xf0 [2018-02-02 10:40:50][4397731.724004] cgroup_rmdir+0x2c/0x90 [2018-02-02 10:40:50][4397731.724004] kernfs_iop_rmdir+0x4d/0x80 [2018-02-02 10:40:50][4397731.724004] vfs_rmdir+0xb4/0x130 [2018-02-02 10:40:50][4397731.724004] do_rmdir+0x1c7/0x1e0 [2018-02-02 10:40:50][4397731.724004] SyS_unlinkat+0x22/0x30 [2018-02-02 10:40:50][4397731.724004] entry_SYSCALL_64_fastpath+0x1e/0xad [2018-02-02 10:40:50][4397731.724004] RIP: 0033:0x481bd4 [2018-02-02 10:40:50][4397731.724004] RSP: 002b:00c422893af0 EFLAGS: 0246 ORIG_RAX: 0107 [2018-02-02 10:40:50][4397731.724004] RAX: ffda RBX: RCX: 00481bd4 [2018-02-02 10:40:50][4397731.724004] RDX: 0200 RSI: 00c421c7ef00 RDI: ff9c [2018-02-02
[Kernel-packages] [Bug 1748342] Re: cgroup: remove cgroup directory leading kernel crash in kill_css
Hi, I'm happy to submit this patch to the kernel team, but I wanted to talk about the kernel process and ask a question first. The way this process usually works is: - patch submitted to kernel team - kernel team checks patch and if they are happy with it, applies it to the kernel - this is built into a "proposed" kernel. - the bug is updated with the proposed kernel. - someone - usually the bug reporter - must verify that the proposed kernel fixes the bug. There is usually a 5 working day window to do this. - if the verification is done, the new kernel contains the fix. If verification is not done, the patch is not included in the released kernel. I am not able to do the verification. If the kernel team provides a proposed kernel, are you or your customer able to verify it? Regards, Daniel -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1748342 Title: cgroup: remove cgroup directory leading kernel crash in kill_css Status in linux package in Ubuntu: Incomplete Bug description: We got feedback from customer that cvm(cloud virtual machine) crashed when using kubelet updating container-service in ubuntu xenial. Logs show as follow. We find a patch (commit 33c35aa4817864e056fd772230b0c6b552e36ea2) in linux mainline, which can indeed fix this bug. But ubuntu-xenial.git has not merged it yet. Do you guys have a plan for merging? --panic log- [2018-02-02 10:21:48][4397731.721563] BUG: unable to handle kernel paging request at 0001005c [2018-02-02 10:40:50][4397731.722666] IP: css_clear_dir+0x5/0x70 [2018-02-02 10:40:50][4397731.723261] PGD a12b067 [2018-02-02 10:40:50][4397731.723261] PUD 0 [2018-02-02 10:40:50][4397731.723628] [2018-02-02 10:40:50][4397731.724004] Oops: [#1] SMP [2018-02-02 10:40:50][4397731.724004] Modules linked in: xt_statistic nf_conntrack_netlink ebt_ip ebtable_filter ebtables veth xt_set ip_set_hash_net ip_set nfnetlink xt_nat xt_recent xt_mark ipt_REJ[2018-02-02 10:40:50]ECT nf_reject_ipv4 xt_tcpudp xt_comment ipt_MASQUERADE nf_nat_masquerade_ipv4 xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_fil[2018-02-02 10:40:50]ter ip_tables xt_conntrack x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs ppdev sb_edac edac_core crct10dif_pclmul crc32_pclmul ghash_clmulni_intel joydev input_le[2018-02-02 10:40:50]ds serio_raw parport_pc parport i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 a[2018-02-02 10:40:50]sync_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath [2018-02-02 10:40:50][4397731.724004] linear cirrus ttm drm_kms_helper syscopyarea sysfillrect sysimgblt aesni_intel fb_sys_fops aes_x86_64 crypto_simd cryptd glue_helper psmouse virtio_blk virtio_n[2018-02-02 10:40:50]et drm pata_acpi floppy [2018-02-02 10:40:50][4397731.724004] CPU: 0 PID: 23347 Comm: kubelet Not tainted 4.10.0-32-generic #36~16.04.1-Ubuntu [2018-02-02 10:40:50][4397731.724004] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [2018-02-02 10:40:50][4397731.724004] task: 92abde59 task.stack: baa94165c000 [2018-02-02 10:40:50][4397731.724004] RIP: 0010:css_clear_dir+0x5/0x70 [2018-02-02 10:40:50][4397731.724004] RSP: 0018:baa94165fe10 EFLAGS: 00010206 [2018-02-02 10:40:50][4397731.724004] RAX: 47fd40005d7b RBX: ffe8 RCX: 92abffc0fcec [2018-02-02 10:40:50][4397731.724004] RDX: 9b070800 RSI: 0206 RDI: ffe8 [2018-02-02 10:40:50][4397731.724004] RBP: baa94165fe20 R08: c8b18701 R09: 000180220017 [2018-02-02 10:40:50][4397731.724004] R10: 92abc8b187f8 R11: 92abf7751d00 R12: 92abd5601000 [2018-02-02 10:40:50][4397731.724004] R13: R14: 92abd5601150 R15: [2018-02-02 10:40:50][4397731.724004] FS: 7f6f92ffd700() GS:92abffc0() knlGS: [2018-02-02 10:40:50][4397731.724004] CS: 0010 DS: ES: CR0: 80050033 [2018-02-02 10:40:50][4397731.724004] CR2: 0001005c CR3: 280cb000 CR4: 000406f0 [2018-02-02 10:40:50][4397731.724004] Call Trace: [2018-02-02 10:40:50][4397731.724004] ? kill_css+0x12/0x60 [2018-02-02 10:40:50][4397731.724004] cgroup_destroy_locked+0xa5/0xf0 [2018-02-02 10:40:50][4397731.724004] cgroup_rmdir+0x2c/0x90 [2018-02-02 10:40:50][4397731.724004] kernfs_iop_rmdir+0x4d/0x80 [2018-02-02 10:40:50][4397731.724004] vfs_rmdir+0xb4/0x130 [2018-02-02 10:40:50][4397731.724004] do_rmdir+0x1c7/0x1e0 [2018-02-02 10:40:50][4397731.724004] SyS_unlinkat+0x22/0x30 [2018-02-02 10:40:50][4397731.724004]
