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-14469] lmv_rmfid() does 128K kmalloc() https://jira.whamcloud.com/browse/LU-14469 Lustre <p>When <tt>ll_rmfid()</tt> is called with 4096 FIDs (which is the max) then <tt>lmv_rmfid()</tt> will kmalloc() a 128K <tt>fid_array</tt>. Seen running sanity 421d locally:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[89441.204480] Lustre: DEBUG MARKER: == sanity test 421d: rmfid en masse ========================= ========================================= 09:24:51 (1614093891) [89445.855469] lt-lfs: page allocation failure: order:5, mode:0xc050 [89445.857280] CPU: 2 PID: 31000 Comm: lt-lfs Kdump: loaded Tainted: G W OE ------------ 3.10.0-1062.9.1.el7.x86_64.debug #1 [89445.860587] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/20 14 [89445.862335] Call Trace: [89445.862774] [&lt;ffffffffa68704ae&gt;] dump_stack+0x19/0x1b [89445.863489] [&lt;ffffffffa620d86a&gt;] warn_alloc_failed+0x11a/0x190 [89445.864314] [&lt;ffffffffa686b1ad&gt;] __alloc_pages_slowpath+0x708/0x776 [89445.865171] [&lt;ffffffffa6213410&gt;] __alloc_pages_nodemask+0x660/0x680 [89445.866104] [&lt;ffffffffa6269b2e&gt;] alloc_pages_current+0x10e/0x1a0 [89445.866938] [&lt;ffffffffa6232115&gt;] ? kmalloc_order+0x25/0x70 [89445.867705] [&lt;ffffffffa6232115&gt;] kmalloc_order+0x25/0x70 [89445.868413] [&lt;ffffffffa62762f4&gt;] kmalloc_order_trace+0x24/0x170 [89445.869234] [&lt;ffffffffa627a279&gt;] __kmalloc+0x409/0x430 [89445.869991] [&lt;ffffffffc141f0c8&gt;] ? lmv_fld_lookup+0x258/0x430 [lmv] [89445.870872] [&lt;ffffffffc14119bb&gt;] lmv_rmfid+0x71b/0xc20 [lmv] [89445.871661] [&lt;ffffffffc2072e81&gt;] ll_rmfid+0x581/0x780 [lustre] [89445.872572] [&lt;ffffffffc2074841&gt;] ll_dir_ioctl+0x17c1/0x61c0 [lustre] [89445.873550] [&lt;ffffffffa62d1a94&gt;] ? mntput+0x24/0x40 [89445.874349] [&lt;ffffffffa62b4dc1&gt;] ? terminate_walk+0xb1/0xc0 [89445.875228] [&lt;ffffffffa642a45b&gt;] ? debug_check_no_obj_freed+0xfb/0x270 [89445.876216] [&lt;ffffffffa61409fd&gt;] ? trace_hardirqs_on+0xd/0x10 [89445.877098] [&lt;ffffffffa642a4d8&gt;] ? debug_check_no_obj_freed+0x178/0x270 [89445.878880] [&lt;ffffffffa62be880&gt;] do_vfs_ioctl+0x410/0x6c0 [89445.880163] [&lt;ffffffffa61787d4&gt;] ? __audit_syscall_entry+0xb4/0x110 [89445.881656] [&lt;ffffffffa62cc6c0&gt;] ? fget_light+0x2b0/0x550 [89445.882968] [&lt;ffffffffa62bebd1&gt;] SyS_ioctl+0xa1/0xc0 [89445.884175] [&lt;ffffffffa6887a9e&gt;] system_call_fastpath+0x25/0x2a [89445.885552] Mem-Info: </pre> </div></div> LU-14469 lmv_rmfid() does 128K kmalloc() Bug Minor Open Unresolved WC Triage John Hammond Tue, 23 Feb 2021 18:20:12 +0000 Tue, 19 Sep 2023 19:09:04 +0000 0 4 <p>lmv_rmfid() also leaks the request set in some error cases.</p> <p>Wrong LU number. For another ticket.</p> Related LU-16427 LU-15058 Development Rank 1|i01nfj: Rank (Obsolete) 9223372036854775807 Severity