[LU-383] sanity: test_180b: NULL pointer dereference in obd echo driver

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Severity: 3
• Assignee: Robert Read (Inactive)
• Reporter: Jinshan Xiong (Inactive)

Description

The log is at: https://maloo.whamcloud.com/sub_tests/b9683a0a-8c49-11e0-aab9-52540025f9af

The problem occurred at OST side:

06:29:14:Unable to handle kernel NULL pointer dereference at 0000000000000090 RIP:
06:29:14: [<ffffffff8000acda>] kmem_cache_alloc+0x43/0x76
06:29:14:PGD 0
06:29:14:Oops: 0000 [1] SMP
06:29:14:last sysfs file: /devices/pci0000:00/0000:00:02.0/0000:02:00.0/irq
06:29:14:CPU 18
06:29:14:Modules linked in: obdecho(U) obdfilter(U) fsfilt_ldiskfs(U) exportfs(U) ost(U) mgc(U) lustre(U) lov(U) osc(U) lquota(U) mdc(U) fid(U) fld(U) ko2iblnd(U) ptlrpc(U) obdclass(U) lnet(U) lvfs(U) libcfs(U) ldiskfs(U) jbd2(U) crc16(U) be2iscsi(U) ib_iser(U) iscsi_tcp(U) bnx2i(U) cnic(U) cxgb3i(U) libiscsi_tcp(U) libiscsi2(U) scsi_transport_iscsi2(U) scsi_transport_iscsi(U) nfs(U) fscache(U) nfs_acl(U) autofs4(U) hidp(U) rfcomm(U) l2cap(U) bluetooth(U) lockd(U) sunrpc(U) cpufreq_ondemand(U) acpi_cpufreq(U) freq_table(U) mperf(U) uio(U) iw_cxgb3(U) cxgb3(U) 8021q(U) ib_srp(U) rds(U) ib_sdp(U) ib_ipoib(U) ipoib_helper(U) ipv6(U) xfrm_nalgo(U) crypto_api(U) rdma_ucm(U) rdma_cm(U) ib_ucm(U) ib_uverbs(U) ib_umad(U) ib_cm(U) iw_cm(U) ib_addr(U) ib_sa(U) loop(U) dm_mirror(U) dm_multipath(U) scsi_dh(U) video(U) backlight(U) sbs(U) power_meter(U) hwmon(U) i2c_ec(U) dell_wmi(U) wmi(U) button(U) battery(U) asus_acpi(U) acpi_memhotplug(U) ac(U) parport_pc(U) lp(U) parport(U) mlx4_ib(U) ib_mad(U) ib_core(U) mlx4_en(U) joydev(U) tpm_tis(U) i7core_edac(U) i2c_i801(U) shpchp(U) edac_mc(U) i2c_core(U) tpm(U) e1000e(U) tpm_bios(U) mlx4_core(U) serio_raw(U) sg(U) pcspkr(U) dm_raid45(U) dm_message(U) dm_region_hash(U) dm_log(U) dm_mod(U) dm_mem_cache(U) ahci(U) libata(U) sd_mod(U) scsi_mod(U) ext3(U) jbd(U) uhci_hcd(U) ohci_hcd(U) ehci_hcd(U)
06:29:14:Pid: 352, comm: lcm_lustre-OST0 Tainted: G 2.6.18-238.9.1.el5_lustre.gc66d831 #1
06:29:14:RIP: 0010:[<ffffffff8000acda>] [<ffffffff8000acda>] kmem_cache_alloc+0x43/0x76
06:29:14:RSP: 0018:ffff81032420ddc0 EFLAGS: 00010046
06:29:14:RAX: 0000000000000012 RBX: 0000000000000246 RCX: 0000000000000000
06:29:14:RDX: 0000000000000070 RSI: 0000000000000050 RDI: 0000000000000000
06:29:14:RBP: 0000000000000050 R08: ffff81032420c000 R09: 000000000000002d
06:29:14:R10: 0000000000000000 R11: ffff81033f3cf500 R12: 0000000000000000
06:29:14:R13: ffff81032420dee0 R14: ffff810324200b40 R15: 0000000000000000
06:29:14:FS: 00002ab6045596e0(0000) GS:ffff81063fd663c0(0000) knlGS:0000000000000000
06:29:14:CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
06:29:14:CR2: 0000000000000090 CR3: 0000000000201000 CR4: 00000000000006e0
06:29:14:Process lcm_lustre-OST0 (pid: 352, threadinfo ffff81032420c000, task ffff81031a3f2820)
06:29:14:Stack: ffffffff88e0c220 ffff81032420dea0 0000000000000078 ffffffff88e01e01
06:29:14: ffff81032420de10 00000000000003e8 00000001001c2488 ffffffff8005bb81
06:29:14: 00000001001c2488 ffffffff88e0c220 ffff81032420dea0 ffffffff8898924f
06:29:14:Call Trace:
06:29:14: [<ffffffff88e01e01>] :obdecho:echo_thread_key_init+0x51/0x1d0
06:29:14: [<ffffffff8005bb81>] del_timer_sync+0xc/0x16
06:29:14: [<ffffffff8898924f>] :obdclass:keys_fill+0x4f/0x100
06:29:14: [<ffffffff88989329>] :obdclass:lu_env_refill+0x9/0x30
06:29:14: [<ffffffff88a7ee18>] :ptlrpc:ptlrpcd+0x138/0x320
06:29:14: [<ffffffff8008e437>] default_wake_function+0x0/0xe
06:29:14: [<ffffffff800b9a51>] audit_syscall_exit+0x329/0x344
06:29:14: [<ffffffff8005dfb1>] child_rip+0xa/0x11
06:29:14: [<ffffffff88a7ece0>] :ptlrpc:ptlrpcd+0x0/0x320
06:29:14: [<ffffffff8005dfa7>] child_rip+0x0/0x11
06:29:14:
=====================================

It looks like osc memcache was not even initialized.

Issue Links

• duplicates: LU-362 lu_kmem_init() needs error handling