Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-2077] Null pointer dereference in ofd_health_check+0x28 https://jira.whamcloud.com/browse/LU-2077 Lustre <p>I'm certain this was fixed previously on the Orion branch in ORI-450.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 IP: [&lt;ffffffffa072f3f7&gt;] lu_context_key_get+0x17/0x60 [obdclass] PGD 10049b7067 PUD ff6b17067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu15/cache/index2/shared_cpu_map CPU 9 Modules linked in: ofd(U) ost(U) mgc(U) osd_zfs(U) lquota(U) lustre(U) lov(U) osc(U) mdc(U) fid(U) fld(U) ptlrpc(U) obdclass(U) lvfs(U) zfs(P)(U) zcommon(P)(U) znvpair(P)(U) dm_round_robin zavl(P)(U) scsi_dh_rdac zunicode(P)(U) spl(U) zlib_deflate sg sd_mod crc_t10dif acpi_cpufreq freq_table mperf ib_srp scsi_transport_srp scsi_tgt ksocklnd(U) ko2iblnd(U) lnet(U) sha512_generic sha256_generic libcfs(U) ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ib_addr ib_sa mlx4_ib ib_mad ib_core dm_mirror dm_region_hash dm_log dm_multipath dm_mod vhost_net macvtap macvlan tun kvm wmi sb_edac edac_core i2c_i801 i2c_core ahci iTCO_wdt iTCO_vendor_support ioatdma ipv6 nfs lockd fscache nfs_acl auth_rpcgss sunrpc igb dca mlx4_en mlx4_core [last unloaded: obdfilter] Pid: 9929, comm: grep Tainted: P ---------------- 2.6.32-220.23.1.1chaos.ch5.x86_64 #1 appro gb812x-cn/S2600JF RIP: 0010:[&lt;ffffffffa072f3f7&gt;] [&lt;ffffffffa072f3f7&gt;] lu_context_key_get+0x17/0x60 [obdclass] RSP: 0018:ffff881004481db8 EFLAGS: 00010246 RAX: 0000000000000013 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff88082aeb6a40 RSI: ffffffffa0a18040 RDI: 0000000000000000 RBP: ffff881004481db8 R08: ffff881004481e64 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: ffff8807f9418000 R14: ffff88102518f500 R15: ffff88102518f500 FS: 00002aaaab289f60(0000) GS:ffff88085c420000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000010042ac000 CR4: 00000000000406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process grep (pid: 9929, threadinfo ffff881004480000, task ffff88102518f500) Stack: ffff881004481de8 ffffffffa09fb338 0000000000000002 0000000000000003 &lt;0&gt; ffff8807f941c138 0000000000000000 ffff881004481e38 ffffffffa06d38e7 &lt;0&gt; 0000100004481e28 ffff8810040b4000 ffff881004481f48 ffff881004481f48 Call Trace: [&lt;ffffffffa09fb338&gt;] ofd_health_check+0x28/0x300 [ofd] [&lt;ffffffffa06d38e7&gt;] obd_proc_read_health+0x297/0x3b0 [obdclass] [&lt;ffffffffa06f6673&gt;] lprocfs_fops_read+0xf3/0x1f0 [obdclass] [&lt;ffffffff811dc9fe&gt;] proc_reg_read+0x7e/0xc0 [&lt;ffffffff811782d5&gt;] vfs_read+0xb5/0x1a0 [&lt;ffffffff81178411&gt;] sys_read+0x51/0x90 [&lt;ffffffff8100b0f2&gt;] system_call_fastpath+0x16/0x1b Code: 00 00 00 04 00 e8 5a 1b c0 ff 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 0f 1f 44 00 00 48 63 46 20 48 3b 34 c5 00 f6 7b a0 75 0a &lt;48&gt; 8b 57 10 48 8b 04 c2 c9 c3 48 c7 c7 40 2d 79 a0 48 c7 c2 a0 RIP [&lt;ffffffffa072f3f7&gt;] lu_context_key_get+0x17/0x60 [obdclass] RSP &lt;ffff881004481db8&gt; CR2: 0000000000000010 </pre> </div></div> LU-2077 Null pointer dereference in ofd_health_check+0x28 Bug Major Resolved Fixed WC Triage Prakash Surya Tue, 2 Oct 2012 14:18:38 +0000 Tue, 2 Oct 2012 15:06:26 +0000 Tue, 2 Oct 2012 15:06:25 +0000 0 4 <p>yes, that was added to Orion after OFD was landed into the master. That missed code was added in <a href="http://review.whamcloud.com/#change,4143" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#change,4143</a> and landed to the master recently, maybe it is not in your tree yet?</p> <p>Thanks for the pointer. We don't have that in our tree yet, but will bring it in soon. Marking as "fixed" since it's on master.</p> <p>Fix landed on master: <a href="http://review.whamcloud.com/4143" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/4143</a> </p> Development Rank 1|hzv4xz: Rank (Obsolete) 4334 Severity