[ovs-discuss] remove ovs2.9.0 kernel module will crash the system.

Gregory Rose gvrose8192 at gmail.com
Fri Nov 22 23:27:21 UTC 2019


On 11/22/2019 12:45 AM, djliu wrote:
>
> Hi all,
>
> Recently I upgrade my kernel from 2.9.0 to 2.10.0. When I remove ovs 
> 2.9.0 kernel module, the system crash, then reboot. Does anyone know 
> why? My environment is centos7, linux3.10.693
>

The openvswitch module is not linked in when you try to remove the 
package and the panic hits.  It may be that
the openvswitch kernel module left something unhandled during removal.

Does openvswitch start automatically when you reboot?  Try disabling the 
service so that it does not start, reboot
and then try to remove the package.  Note that the package is from 
Centos so we have little control over what they
package and distribute.

- Greg

> Below is my steps:
>
> /ovs-dpct del-dp ovs-system/
>
> /ip//link del genev_sys_6081/
>
> /ip//link del vxlan_sys_4789/
>
> /docker//stop openvswitchd/
>
> /rmmod//vport_geneve && rmmod vport_vxlan && rmmod openvswitch/
>
> /rpm –e openvswitch-kmod-2.9.0-1.el7.centos.x86_64 //Here, system crash./
>
> //
>
> The dmesg:
>
> [6947249.802101] BUG: unable to handle kernel paging request at 
> ffffffffc091a280
>
> [6947249.802477] IP: [<ffffffff81613aa0>] 
> inet_frag_secret_rebuild+0x50/0x120
>
> [6947249.802772] PGD 19f5067 PUD 19f7067 PMD 1fede12067 PTE 0
>
> [6947249.803068] Oops: 0000 [#1] SMP
>
> [6947249.803361] Modules linked in: vxlan nf_conntrack_netlink 
> nfnetlink vhost_net vhost macvtap macvlan tun ebtable_filter ebtables 
> devlink ip6table_filter ip6_tables geneve ip6_udp_tunnel udp_tunnel 
> nf_conntrack_ipv6 nf_nat_ipv6 nf_defrag_ipv6 8021q garp mrp fuse btrfs 
> raid6_pq xor vfat msdos fat ext4 mbcache jbd2 i40evf(OE) 
> ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 
> nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack 
> nf_nat nf_conntrack br_netfilter bridge stp llc dm_thin_pool 
> dm_persistent_data dm_bio_prison dm_bufio loop bonding dm_mirror 
> dm_region_hash dm_log dm_mod sb_edac edac_core coretemp intel_rapl 
> iosf_mbi kvm_intel kvm irqbypass crc32_pclmul ghash_clmulni_intel 
> aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt 
> iTCO_vendor_support joydev
>
> [6947249.806297]mxm_wmi ses enclosure mei_me scsi_transport_sas mei sg 
> pcspkr i2c_i801 lpc_ich shpchp ipmi_si ipmi_devintf ipmi_msghandler 
> acpi_power_meter wmi ip_tables xfs libcrc32c sd_mod crc_t10dif 
> crct10dif_generic ast drm_kms_helper syscopyarea sysfillrect sysimgblt 
> fb_sys_fops ttm drm ahci igb libahci crct10dif_pclmul crct10dif_common 
> libata crc32c_intel megaraid_sas dca i40e(OE) ptp i2c_algo_bit 
> i2c_core pps_core [last unloaded: openvswitch]
>
> [6947249.809054] CPU: 25 PID: 0 Comm: swapper/25 Tainted: 
> GWOE------------3.10.0-693.el7.x86_64 #1
>
> [6947249.809835] Hardware name: Sugon I620-G20/60G24-US, BIOS 001 
> 02/10/2017
>
> [6947249.810637] task: ffff8801536ddee0 ti: ffff8801536f4000 task.ti: 
> ffff8801536f4000
>
> [6947249.811467] RIP: 0010:[<ffffffff81613aa0>][<ffffffff81613aa0>] 
> inet_frag_secret_rebuild+0x50/0x120
>
> [6947249.812335] RSP: 0018:ffff881fffb43de8EFLAGS: 00010286
>
> [6947249.813210] RAX: 0000000000000000 RBX: ffffffffc091a280 RCX: 
> 0000000000000000
>
> [6947249.814115] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 
> ffff881fffb43db0
>
> [6947249.815034] RBP: ffff881fffb43e20 R08: 00000000a352f37e R09: 
> ffff881fffb43d70
>
> [6947249.815965] R10: 0000000066fee719 R11: 00000000f69096ad R12: 
> 0000000000000000
>
> [6947249.816912] R13: ffffffffc091a280 R14: ffffffff81613a50 R15: 
> ffffffffc091a280
>
> [6947249.817880] FS:0000000000000000(0000) GS:ffff881fffb40000(0000) 
> knlGS:0000000000000000
>
> [6947249.818877] CS:0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>
> [6947249.819887] CR2: ffffffffc091a280 CR3: 00000000019f2000 CR4: 
> 00000000003427e0
>
> [6947249.820922] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
> 0000000000000000
>
> [6947249.821966] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 
> 0000000000000400
>
> [6947249.823014] Stack:
>
> [6947249.824059]ffffffffc091e280 000000029e15af7c ffff880152d00000 
> ffffffffc091e290
>
> [6947249.825157]0000000000000100 ffffffff81613a50 ffffffffc091a280 
> ffff881fffb43e58
>
> [6947249.826275]ffffffff81097316 ffff880152d00000 000000000000007c 
> ffffffff81613a50
>
> [6947249.827414] Call Trace:
>
> [6947249.828552]<IRQ>
>
> [6947249.828569]
>
> [6947249.829709][<ffffffff81613a50>] ? inet_frags_init+0xa0/0xa0
>
> [6947249.830880][<ffffffff81097316>] call_timer_fn+0x36/0x110
>
> [6947249.832065][<ffffffff81613a50>] ? inet_frags_init+0xa0/0xa0
>
> [6947249.833265][<ffffffff8109982d>] run_timer_softirq+0x22d/0x310
>
> [6947249.834477][<ffffffff81090b3f>] __do_softirq+0xef/0x280
>
> [6947249.835694][<ffffffff816b6a5c>] call_softirq+0x1c/0x30
>
> [6947249.836916][<ffffffff8102d3c5>] do_softirq+0x65/0xa0
>
> [6947249.838148][<ffffffff81090ec5>] irq_exit+0x105/0x110
>
> [6947249.839388][<ffffffff816b76c2>] smp_apic_timer_interrupt+0x42/0x50
>
> [6947249.840647][<ffffffff816b5c1d>] apic_timer_interrupt+0x6d/0x80
>
> [6947249.841917]<EOI>
>
> [6947249.841929]
>
> [6947249.843199][<ffffffff816ab4a6>] ? native_safe_halt+0x6/0x10
>
> [6947249.844497][<ffffffff816ab33e>] default_idle+0x1e/0xc0
>
> [6947249.845785][<ffffffff81035006>] arch_cpu_idle+0x26/0x30
>
> [6947249.847062][<ffffffff810e7bca>] cpu_startup_entry+0x14a/0x1c0
>
> [6947249.848333][<ffffffff81051af6>] start_secondary+0x1b6/0x230
>
> [6947249.849598] Code: 00 48 89 45 d0 48 8d 87 00 40 00 00 48 89 c7 48 
> 89 45 c8 e8 83 7e 09 00 48 8d bb 60 40 00 00 be 04 00 00 00 e8 42 da 
> e0 ff 66 90 <49> 8b 55 00 48 85 d2 74 76 4c 8d 7a 98 eb 05 90 4d 8d 7e 
> 98 4d
>
> [6947249.852219] RIP[<ffffffff81613aa0>] 
> inet_frag_secret_rebuild+0x50/0x120
>
> [6947249.853465]RSP <ffff881fffb43de8>
>
> [6947249.854669] CR2: ffffffffc091a280
>
>
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