https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-13294 Lustre <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> [ 891.249374] BUG: unable to handle kernel paging request at 0000000100002007 [ 891.256366] IP: [&lt;ffffffff847c0da7&gt;] __alloc_pages_nodemask+0x97/0x420 [ 891.262918] PGD 1fb43dd067 PUD 0 [ 891.266272] Oops: 0000 [#1] SMP [ 891.269539] Modules linked in: lnet(OE+) libcfs(OE) ext4 mbcache jbd2 nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack xt_multiport iptable_filter xt_CT nf_conntrack libcrc32c iptable_raw mst_pciconf(OE) mlx4_ib(OE) mlx4_en(OE) mlx4_core(OE) rdma_ucm(OE) ib_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_umad(OE) ib_ipoib(OE) ib_cm(OE) mlx5_ib(OE) zfs(POE) zunicode(POE) zlua(POE) edac_mce_amd kvm irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd pcspkr zcommon(POE) znvpair(POE) ib_uverbs(OE) zavl(POE) icp(POE) ib_core(OE) spl(OE) mlx5_core(OE) dm_mod mlx_compat(OE) mlxfw devlink i2c_piix4 i2c_designware_platform i2c_designware_core pinctrl_amd acpi_cpufreq ip_tables nfsv3 nfs_acl nfs lockd grace fscache team_mode_activebackup team crct10dif_pclmul crct10dif_common crc32c_intel igb i2c_algo_bit dca ptp pps_core nvme nvme_core nfit libnvdimm sunrpc ipmi_si ipmi_devintf ipmi_msghandler [last unloaded: libcfs] [ 891.353833] CPU: 9 PID: 81842 Comm: modprobe Kdump: loaded Tainted: P W OE ------------ 3.10.0-957.1.3957.1.3.x4.1.17.x86_64 #1 [ 891.366249] Hardware name: None None/None, BIOS 5.14 01/21/2020 [ 891.372167] task: ffff8c874fde9040 ti: ffff8c874dbb8000 task.ti: ffff8c874dbb8000 [ 891.379638] RIP: 0010:[&lt;ffffffff847c0da7&gt;] [&lt;ffffffff847c0da7&gt;] __alloc_pages_nodemask+0x97/0x420 [ 891.388602] RSP: 0018:ffff8c874dbbba40 EFLAGS: 00010246 [ 891.393911] RAX: 0000000100001fff RBX: 0000000000000000 RCX: ffff8c874dbbbfd8 [ 891.401037] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000201250 [ 891.408169] RBP: ffff8c874dbbbae0 R08: ffff8c974da36600 R09: 0000000100400010 [ 891.415292] R10: ffff8c978ff54d40 R11: ffffffffffffff88 R12: 0000000000201250 [ 891.422418] R13: 0000000000000400 R14: 0000000000000002 R15: 0000000000000000 [ 891.429549] FS: 00007fe9f08bf740(0000) GS:ffff8c974ee40000(0000) knlGS:0000000000000000 [ 891.437629] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 891.443373] CR2: 0000000100002007 CR3: 0000001fd6a8c000 CR4: 0000000000340fe0 [ 891.450497] Call Trace: [ 891.452944] [&lt;ffffffff8481a2e2&gt;] ? deactivate_slab+0x122/0x3c0 [ 891.458860] [&lt;ffffffff84818d51&gt;] new_slab+0x91/0x390 [ 891.463907] [&lt;ffffffff8481a9fc&gt;] ___slab_alloc+0x3ac/0x4f0 [ 891.469481] [&lt;ffffffff8488efde&gt;] ? ep_poll_callback+0xee/0x210 [ 891.475415] [&lt;ffffffffc0a71ee5&gt;] ? cfs_percpt_alloc+0xf5/0x480 [libcfs] [ 891.482116] [&lt;ffffffff846cba9b&gt;] ? __wake_up_common+0x5b/0x90 [ 891.487947] [&lt;ffffffffc09f2000&gt;] ? 0xffffffffc09f1fff [ 891.493088] [&lt;ffffffff84982634&gt;] ? pointer.isra.19+0xd4/0x4d0 [ 891.498921] [&lt;ffffffffc0a71ee5&gt;] ? cfs_percpt_alloc+0xf5/0x480 [libcfs] [ 891.505620] [&lt;ffffffff84d6060c&gt;] __slab_alloc+0x40/0x5c [ 891.510930] [&lt;ffffffff8481ebaf&gt;] __kmalloc_node+0xbf/0x2b0 [ 891.516506] [&lt;ffffffffc0a71ee5&gt;] cfs_percpt_alloc+0xf5/0x480 [libcfs] [ 891.523030] [&lt;ffffffffc0a72ce0&gt;] cfs_percpt_lock_create+0x90/0x3d0 [libcfs] [ 891.530073] [&lt;ffffffffc09f2000&gt;] ? 0xffffffffc09f1fff [ 891.535210] [&lt;ffffffffc0b7328f&gt;] lnet_lib_init+0xef/0x340 [lnet] [ 891.541303] [&lt;ffffffffc09f2081&gt;] lnet_init+0x81/0x1000 [lnet] [ 891.547131] [&lt;ffffffff8460210a&gt;] do_one_initcall+0xba/0x240 [ 891.552791] [&lt;ffffffff8471907c&gt;] load_module+0x272c/0x2bc0 [ 891.558365] [&lt;ffffffff849a3480&gt;] ? ddebug_proc_write+0x100/0x100 [ 891.564453] [&lt;ffffffff84714c03&gt;] ? copy_module_from_fd.isra.44+0x53/0x150 [ 891.571318] [&lt;ffffffff847196f6&gt;] SyS_finit_module+0xa6/0xd0 [ 891.576981] [&lt;ffffffff84d76ddb&gt;] system_call_fastpath+0x22/0x27 [ 891.582983] Code: c1 eb 02 c1 e8 13 83 e3 02 83 e0 01 09 c3 44 23 25 7f a5 b9 00 48 c7 45 c0 00 00 00 00 41 f6 c4 10 0f 85 3d 02 00 00 48 8b 45 b0 &lt;48&gt; 83 78 08 00 0f 84 93 01 00 00 66 66 66 66 90 48 8b 45 b0 44 [ 891.602977] RIP [&lt;ffffffff847c0da7&gt;] __alloc_pages_nodemask+0x97/0x420 [ 891.609597] RSP &lt;ffff8c874dbbba40&gt; [ 891.613080] CR2: 0000000100002007 </pre> </div></div> LU-13294

wrong cpt malloc rotor handling leads to oops

Bug Minor Resolved Fixed Andrew Perepechko Andrew Perepechko patch Tue, 25 Feb 2020 09:57:46 +0000 Mon, 15 Jun 2020 18:37:38 +0000 Tue, 24 Mar 2020 11:52:23 +0000 Upstream Lustre 2.14.0 Lustre 2.12.5 0 2 <p>Andrew Perepechko (c17827@cray.com) uploaded a new patch: <a href="https://review.whamcloud.com/37709" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/37709</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13294" title="wrong cpt malloc rotor handling leads to oops" class="issue-link" data-issue-key="LU-13294"><del>LU-13294</del></a> libcfs: incorrect rotor behaviour<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 79896752f0ee74d85650e5fb1d201085bfd55d46</p> <p>Alternate bug description is in the comments:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> <span class="code-object">int</span> cfs_cpt_spread_node(struct cfs_cpt_table *cptab, <span class="code-object">int</span> cpt) { nodemask_t *mask; <span class="code-object">int</span> weight; unsigned <span class="code-object">int</span> rotor; <span class="code-object">int</span> node = 0; <span class="code-comment">/* convert CPU partition ID to HW node id */</span> <span class="code-keyword">if</span> (cpt &lt; 0 || cpt &gt;= cptab-&gt;ctb_nparts) { mask = cptab-&gt;ctb_nodemask; rotor = cptab-&gt;ctb_spread_rotor++; } <span class="code-keyword">else</span> { mask = cptab-&gt;ctb_parts[cpt].cpt_nodemask; rotor = cptab-&gt;ctb_parts[cpt].cpt_spread_rotor++; <span class="code-comment">// here rotor is initialized to -1 (the <span class="code-keyword">default</span> cpt_spread_rotor value) </span> node = cptab-&gt;ctb_parts[cpt].cpt_node; } weight = nodes_weight(*mask); <span class="code-comment">// <span class="code-keyword">if</span> numa nodes # is greater than 1, then weight is greater than 1 </span> <span class="code-keyword">if</span> (weight &gt; 0) { rotor %= weight; <span class="code-comment">// -1 mod (anything other than 0 and 1) is -1 </span> for_each_node_mask(node, *mask) { <span class="code-keyword">if</span> (!rotor--) <span class="code-comment">// <span class="code-keyword">this</span> check will never succeed, for_each_node_mask will exit with node=1024 which will be passed to kmalloc_node() </span> <span class="code-keyword">return</span> node; } } <span class="code-keyword">return</span> node; } EXPORT_SYMBOL(cfs_cpt_spread_node); </pre> </div></div> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/37709/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/37709/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13294" title="wrong cpt malloc rotor handling leads to oops" class="issue-link" data-issue-key="LU-13294"><del>LU-13294</del></a> libcfs: incorrect rotor behaviour<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: f8aa86dd1622804d81020a7dbb1116f276b340f3</p> <p>Landed for 2.14</p> <p>Minh Diep (mdiep@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/38049" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/38049</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13294" title="wrong cpt malloc rotor handling leads to oops" class="issue-link" data-issue-key="LU-13294"><del>LU-13294</del></a> libcfs: incorrect rotor behaviour<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: 1<br/> Commit: 82a2789b3ae34348c9409834b29d03a849a16efd</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/38049/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/38049/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13294" title="wrong cpt malloc rotor handling leads to oops" class="issue-link" data-issue-key="LU-13294"><del>LU-13294</del></a> libcfs: incorrect rotor behaviour<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: <br/> Commit: 4f704583cd561a7b6ce38c032188a6b23d9faf38</p> Related Development Rank 1|i00ub3: Rank (Obsolete) 9223372036854775807 Severity