Oracle Linux: UEK4 Kernel WARNING at "lib/list_debug.c:36 __list_add+0xcb/0xd0()" (Doc ID 2605383.1)

Last updated on NOVEMBER 01, 2019

Applies to:

Symptoms

Connectivity issues between the Linux server and underlying SAN storage device with the below error messages and call traces.

Jun 5 08:31:10 hostname kernel: [7845340.509215] WARNING: CPU: 22 PID: 1572 at lib/list_debug.c:36 __list_add+0xcb/0xd0()
Jun 5 08:31:10 hostname kernel: [7845340.509218] list_add double add: new=ffff887f5f593340, prev=ffff887f5f593340, next=ffff887f61414ea0.
Jun 5 08:31:10 hostname kernel: [7845340.509219] Modules linked in: oracleacfs(PO) oracleadvm(PO) oracleoks(PO) rpcsec_gss_krb5 auth_rpcgss nfsv4 nfnetlink_log nfnetlink tcp_diag inet_dia
g iptable_filter ip_tables mptctl mptbase oracleasm autofs4 nfsv3 nfs_acl nfs fscache lockd grace 8021q mrp garp stp llc sunrpc bonding ipv6 ext2 dm_round_robin dm_multipath iTCO_wdt iTCO_vendor_
support pcspkr serio_raw sb_edac edac_core i2c_i801 i2c_core hpilo hpwdt lpc_ich mfd_core ipmi_devintf ipmi_si ipmi_msghandler acpi_cpufreq ixgbe dca vxlan udp_tunnel ip6_udp_tunnel bnx2x ptp pps
_core libcrc32c mdio sg ext4 jbd2 mbcache2 sd_mod xhci_pci xhci_hcd ahci libahci qla2xxx scsi_transport_fc hpsa scsi_transport_sas wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: oracl
eoks]
Jun 5 08:31:10 hostname kernel: [7845340.509270] CPU: 22 PID: 1572 Comm: qla2xxx_4_dpc Tainted: P W O 4.1.12-124.24.1.el6uek.x86_64 #2
Jun 5 08:31:10 hostname kernel: [7845340.509271] Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 10/17/2018
Jun 5 08:31:10 hostname kernel: [7845340.509274] 0000000000000000 ffff883f578c3c58 ffffffff816e9810 ffff883f578c3ca8
Jun 5 08:31:10 hostname kernel: [7845340.509276] ffffffff81a0de79 ffff883f578c3c98 ffffffff8108601a ffff883f578c3c88
Jun 5 08:31:10 hostname kernel: [7845340.509278] ffff887f5f593340 ffff887f61414ea0 ffff887f5f593340 0000000000000102
Jun 5 08:31:10 hostname kernel: [7845340.509281] Call Trace:
Jun 5 08:31:10 hostname kernel: [7845340.509290] [<ffffffff816e9810>] dump_stack+0x63/0x81
Jun 5 08:31:10 hostname kernel: [7845340.509296] [<ffffffff8108601a>] warn_slowpath_common+0x8a/0xc0
Jun 5 08:31:10 hostname kernel: [7845340.509298] [<ffffffff81086096>] warn_slowpath_fmt+0x46/0x50
Jun 5 08:31:10 hostname kernel: [7845340.509300] [<ffffffff813453bb>] __list_add+0xcb/0xd0
Jun 5 08:31:10 hostname kernel: [7845340.509315] [<ffffffffa0099d66>] qla24xx_async_gnl+0xc6/0x420 [qla2xxx]
Jun 5 08:31:10 hostname kernel: [7845340.509320] [<ffffffff810cbe28>] ? __wake_up+0x48/0x60
Jun 5 08:31:10 hostname kernel: [7845340.509325] [<ffffffffa0091c5c>] qla2x00_do_work+0xfc/0x760 [qla2xxx]
Jun 5 08:31:10 hostname kernel: [7845340.509328] [<ffffffff816ec49a>] ? __schedule+0x24a/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509330] [<ffffffff816ec48e>] ? __schedule+0x23e/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509332] [<ffffffff816ec49a>] ? __schedule+0x24a/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509334] [<ffffffff816ec48e>] ? __schedule+0x23e/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509336] [<ffffffff816ec49a>] ? __schedule+0x24a/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509339] [<ffffffff816ec4cf>] ? __schedule+0x27f/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509344] [<ffffffffa009267d>] qla2x00_do_dpc+0x14d/0x930 [qla2xxx]
Jun 5 08:31:10 hostname kernel: [7845340.509350] [<ffffffffa0092530>] ? qla2x00_relogin+0x230/0x230 [qla2xxx]
Jun 5 08:31:10 hostname kernel: [7845340.509354] [<ffffffff810a68fb>] kthread+0xcb/0xf0
Jun 5 08:31:10 hostname kernel: [7845340.509357] [<ffffffff816ec49a>] ? __schedule+0x24a/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509359] [<ffffffff816ec49a>] ? __schedule+0x24a/0x810
Jun 5 08:31:10 hostname kernel: [7845340.509361] [<ffffffff810a6830>] ? kthread_create_on_node+0x180/0x180
Jun 5 08:31:10 hostname kernel: [7845340.509364] [<ffffffff816f25c1>] ret_from_fork+0x61/0x90
Jun 5 08:31:10 hostname kernel: [7845340.509366] [<ffffffff810a6830>] ? kthread_create_on_node+0x180/0x180
Jun 5 08:31:10 hostname kernel: [7845340.509367] ---[ end trace 0766b68dfb003f11 ]---
Jun 5 10:05:40 hostname kernel: [7851010.997457] ------------[ cut here ]------------

Cause

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