On 07/26/2018 08:48 AM, Laurence Oberman wrote:
Hello https://www.spinics.net/lists/linux-rdma/msg51334.html A rhel 7.5 with backports from upstream is hitting this. Chuck Reported it and Sagi and Max responded but its not clear if we ever fixed this.
RHEL-7.5 data point: -- drivers/infiniband/* -r is backported to v4.14. i.e., includes the patch(es) mentioned in the above thread. Laurence: Please test with 7.6 kernel & report back. if that passes, RH can bisect the bug fix btwn v4.14 & v4.16(the 7.6 update point for its rdma kernel core), and backport to 7.5-zstream. note: you'll have to update rdma-core pkg to the 7.6 version as well. All functional & bug fix patches to mlx* (ib & enet) are in as well (same kernel references). -dd
In this case we land up in a panic, noty just messaging, although the messages logged for a long time over and over until we finally panicked. crash> log | grep "memreg failure: memor" | wc -l 2414 crash> log [1635578.012721] connection16:0: detected conn error (1011) [1635587.050688] mlx5_0:dump_cqe:262:(pid 93128): dump error cqe [1635587.089686] 00000000 00000000 00000000 00000000 [1635587.123989] 00000000 00000000 00000000 00000000 [1635587.157494] 00000000 00000000 00000000 00000000 [1635587.190968] 00000000 08007806 250002ad ba6115d3 [1635587.224331] iser: iser_err_comp: memreg failure: memory management operation error (6) vend_err 78 [1635587.278876] connection15:0: detected conn error (1011) [1635590.986286] mlx5_1:dump_cqe:262:(pid 0): dump error cqe [1635591.021891] 00000000 00000000 00000000 00000000 [1635591.053944] 00000000 00000000 00000000 00000000 [1657077.997960] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 [1657077.997967] IP: [<ffffffffc08a541e>] iscsi_verify_itt+0x1e/0x110 [libiscsi] [1657077.997970] PGD 80000098de387067 PUD b8d9ffa067 PMD 0 [1657077.997971] Oops: 0000 [#1] SMP [1657077.998009] Modules linked in: oracleasm(O) nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache dm_round_robin bonding rpcrdma ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp scsi_tgt ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm mlx5_ib ib_core vfat fat xfs sb_edac edac_core intel_powerclamp coretemp intel_rapl iosf_mbi kvm_intel kvm irqbypass iTCO_wdt crc32_pclmul ipmi_ssif iTCO_vendor_support ghash_clmulni_intel aesni_intel lrw gf128mul ipmi_si glue_helper ablk_helper cryptd sg hpwdt hpilo pcspkr ipmi_devintf ioatdma dm_multipath i2c_i801 lpc_ich shpchp dca wmi ipmi_msghandler pcc_cpufreq acpi_power_meter nfsd binfmt_misc auth_rpcgss nfs_acl lockd grace sunrpc ip_tables ext4 mbcache jbd2 sd_mod crc_t10dif crct10dif_generic [1657077.998020] i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm bnx2x mlx5_core crct10dif_pclmul mdio tg3(OE) devlink libcrc32c crct10dif_common drm hpsa(OE) ptp i2c_core crc32c_intel scsi_transport_sas pps_core dm_mirror dm_region_hash dm_log dm_mod [1657077.998023] CPU: 20 PID: 41538 Comm: sh Tainted: G OE - ----------- 3.10.0-693.34.1.el7_bz1582551.x86_64 #1 [1657077.998024] Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 05/21/2018 [1657077.998025] task: ffff88587ce38fd0 ti: ffff884dd0af0000 task.ti: ffff884dd0af0000 [1657077.998029] RIP: 0010:[<ffffffffc08a541e>] [<ffffffffc08a541e>] iscsi_verify_itt+0x1e/0x110 [libiscsi] [1657077.998030] RSP: 0000:ffff88beff403d78 EFLAGS: 00010286 [1657077.998031] RAX: 000000000000004c RBX: 00000000b0000036 RCX: 0000000000000002 [1657077.998032] RDX: 00000000000000cc RSI: 00000000b0000036 RDI: 0000000000000000 [1657077.998033] RBP: ffff88beff403da0 R08: 0000000040032a20 R09: ffff8896e4eaf91c [1657077.998034] R10: 0000000000000000 R11: 00007ffff7763ca0 R12: 0000000000000000 [1657077.998035] R13: ffff8896e4eaf9e4 R14: ffff8896e4eaf900 R15: 0000000000000000 [1657077.998036] FS: 00007ffff7fe6740(0000) GS:ffff88beff400000(0000) knlGS:0000000000000000 [1657077.998038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [1657077.998039] CR2: 0000000000000010 CR3: 000000ad92eba000 CR4: 00000000003607e0 [1657077.998040] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [1657077.998041] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [1657077.998042] Call Trace: [1657077.998044] <IRQ> [1657077.998046] [<ffffffffc08a5527>] iscsi_itt_to_ctask+0x17/0x80 [libiscsi] [1657077.998050] [<ffffffffc05eefea>] iser_task_rsp+0xca/0x360 [ib_iser] [1657077.998061] [<ffffffffc0587fbb>] __ib_process_cq+0x6b/0xe0 [ib_core] [1657077.998066] [<ffffffffc0588122>] ib_poll_handler+0x22/0x80 [ib_core] [1657077.998070] [<ffffffff81358507>] irq_poll_softirq+0xc7/0x100 [1657077.998076] [<ffffffff81095195>] __do_softirq+0xf5/0x280 [1657077.998081] [<ffffffff816c4e8c>] call_softirq+0x1c/0x30 [1657077.998086] [<ffffffff8102d435>] do_softirq+0x65/0xa0 [1657077.998088] [<ffffffff81095515>] irq_exit+0x105/0x110 [1657077.998091] [<ffffffff816c61d6>] do_IRQ+0x56/0xf0 [1657077.998098] [<ffffffff816b837c>] common_interrupt+0x17c/0x17c [1657077.998099] <EOI> [1657077.998113] Code: ff ff ff eb a9 41 be 95 ff ff ff eb a1 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 49 89 fc 53 89 f3 48 83 ec 10 c7 45 d8 00 00 00 00 <4c> 8b 6f 10 65 48 8b 04 25 28 00 00 00 48 89 45 e0 31 c0 83 fe [1657077.998116] RIP [<ffffffffc08a541e>] iscsi_verify_itt+0x1e/0x110 [libiscsi] [1657077.998116] RSP <ffff88beff403d78> [1657077.998117] CR2: 0000000000000010 crash> crash> bt PID: 41538 TASK: ffff88587ce38fd0 CPU: 20 COMMAND: "sh" #0 [ffff88beff403a18] machine_kexec at ffffffff8105ddeb #1 [ffff88beff403a78] __crash_kexec at ffffffff81109902 #2 [ffff88beff403b48] crash_kexec at ffffffff811099f0 #3 [ffff88beff403b60] oops_end at ffffffff816b97a8 #4 [ffff88beff403b88] no_context at ffffffff816a8c96 #5 [ffff88beff403bd8] __bad_area_nosemaphore at ffffffff816a8d2c #6 [ffff88beff403c20] bad_area_nosemaphore at ffffffff816a8e96 #7 [ffff88beff403c30] __do_page_fault at ffffffff816bc6be #8 [ffff88beff403c90] do_page_fault at ffffffff816bc865 #9 [ffff88beff403cc0] page_fault at ffffffff816b8788 [exception RIP: iscsi_verify_itt+30] RIP: ffffffffc08a541e RSP: ffff88beff403d78 RFLAGS: 00010286 RAX: 000000000000004c RBX: 00000000b0000036 RCX: 0000000000000002 RDX: 00000000000000cc RSI: 00000000b0000036 RDI: 0000000000000000 RBP: ffff88beff403da0 R8: 0000000040032a20 R9: ffff8896e4eaf91c R10: 0000000000000000 R11: 00007ffff7763ca0 R12: 0000000000000000 R13: ffff8896e4eaf9e4 R14: ffff8896e4eaf900 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000 #10 [ffff88beff403da8] iscsi_itt_to_ctask at ffffffffc08a5527 [libiscsi] #11 [ffff88beff403dc8] iser_task_rsp at ffffffffc05eefea [ib_iser] #12 [ffff88beff403e10] __ib_process_cq at ffffffffc0587fbb [ib_core] #13 [ffff88beff403e50] ib_poll_handler at ffffffffc0588122 [ib_core] #14 [ffff88beff403e80] irq_poll_softirq at ffffffff81358507 #15 [ffff88beff403eb8] __do_softirq at ffffffff81095195 #16 [ffff88beff403f28] call_softirq at ffffffff816c4e8c #17 [ffff88beff403f40] do_softirq at ffffffff8102d435 #18 [ffff88beff403f60] irq_exit at ffffffff81095515 #19 [ffff88beff403f78] do_IRQ at ffffffff816c61d6 --- <IRQ stack> --- #20 [ffff884dd0af3f58] ret_from_intr at ffffffff816b837c RIP: 000000000041b866 RSP: 00007fffffffea28 RFLAGS: 00000206 RAX: 0000000000000000 RBX: 00007fffffffef53 RCX: 00000000006f1a70 RDX: 00000000006f1a70 RSI: 00000000006f1a90 RDI: 0000000000000000 RBP: 0000000000000002 R8: 0000000000000001 R9: 0000000000000020 R10: 0000000000000003 R11: 00007ffff7763ca0 R12: ffff88beff4061e8 R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000063 ORIG_RAX: ffffffffffffffbb CS: 0033 SS: 002b crash> ps -p 41538 PID: 0 TASK: ffffffff81a0e480 CPU: 0 COMMAND: "swapper/0" PID: 1 TASK: ffff88012e4c8000 CPU: 7 COMMAND: "systemd" PID: 2345 TASK: ffff885ef5eb8fd0 CPU: 14 COMMAND: "zabbix_agentd" PID: 2349 TASK: ffff885efcbcaf70 CPU: 1 COMMAND: "zabbix_agentd" PID: 41538 TASK: ffff88587ce38fd0 CPU: 20 COMMAND: "sh"
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