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-4075 Lustre <p>This is a minor issue since it requires root to exploit.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># echo 0 | tee /proc/fs/lustre/llite/*/xattr_cache 0 # getfattr -n trusted.version /mnt/lustre Message from syslogd@t at Oct 7 09:28:05 ... kernel:LustreError: 10513:0:(osd_handler.c:2741:osd_xattr_get()) ASSERTION( buf-&gt;lb_len == sizeof(dt_obj_version_t) ) failed: Message from syslogd@t at Oct 7 09:28:05 ... kernel:LustreError: 10513:0:(osd_handler.c:2741:osd_xattr_get()) LBUG </pre> </div></div> <p>The special case for XATTR_NAME_VERSION should provide the usual "if buf is NULL then return size..." behavior.</p> LU-4075

osd_xattr_get()) ASSERTION( buf->lb_len == sizeof(dt_obj_version_t) ) failed:

Bug Minor Resolved Fixed John Hammond John Hammond osd Mon, 7 Oct 2013 17:47:54 +0000 Wed, 11 Feb 2015 17:30:06 +0000 Wed, 11 Feb 2015 17:30:06 +0000 Lustre 2.5.0 Lustre 2.7.0 0 4 <p>I agree that assertion is not needed there. Meanwhile dt_version_get() checks return value as well but just reports error is size is not equal to the version size so we may skip any checks in OSD. Nevertheless I wonder shouldn't we prohibit the sending this xattr to the client because this is server-internal attribute and shouldn't be accessed/modified from/by the client.</p> <p>hit this error when doing rolling upgrade, OSS and MDS upgrade from 2.4.3 to b2_6-rc2, clients are still 2.4.3</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>Lustre: DEBUG MARKER: == sanity test 102n: silently ignore setxattr on internal trusted xattrs == 22:31:44 (1406266304) LustreError: 27549:0:(osd_handler.c:2925:osd_xattr_get()) ASSERTION( buf-&gt;lb_len == sizeof(dt_obj_version_t) ) failed: LustreError: 27549:0:(osd_handler.c:2925:osd_xattr_get()) LBUG Message fromPid: 27549, comm: mdt02_007 syslogd@onyx-26 at Jul 24 22:31Call Trace: :45 ... kerne [&lt;ffffffffa0466895&gt;] libcfs_debug_dumpstack+0x55/0x80 [libcfs] l:LustreError: 2 [&lt;ffffffffa0466e97&gt;] lbug_with_loc+0x47/0xb0 [libcfs] 7549:0:(osd_hand [&lt;ffffffffa0d8dd62&gt;] osd_xattr_get+0x2d2/0x2e0 [osd_ldiskfs] ler.c:2925:osd_x [&lt;ffffffffa1001c24&gt;] lod_xattr_get+0x154/0x640 [lod] attr_get()) ASSE [&lt;ffffffffa1074b4a&gt;] mdd_xattr_get+0x9a/0x270 [mdd] RTION( buf-&gt;lb_l [&lt;ffffffffa0f3b899&gt;] mdt_getxattr+0x989/0x1440 [mdt] en == sizeof(dt_ [&lt;ffffffffa04714b8&gt;] ? libcfs_log_return+0x28/0x40 [libcfs] obj_version_t) ) [&lt;ffffffffa07f8c8c&gt;] ? lustre_msg_get_transno+0x8c/0x100 [ptlrpc] failed: [&lt;ffffffffa0f12256&gt;] mdt_tgt_getxattr+0x26/0x40 [mdt] Message from sys [&lt;ffffffffa0859b6c&gt;] tgt_request_handle+0x23c/0xac0 [ptlrpc] logd@onyx-26 at [&lt;ffffffffa080926a&gt;] ptlrpc_main+0xd1a/0x1980 [ptlrpc] Jul 24 22:31:45 [&lt;ffffffffa0808550&gt;] ? ptlrpc_main+0x0/0x1980 [ptlrpc] ... kernel:Lu [&lt;ffffffff8109abf6&gt;] kthread+0x96/0xa0 streError: 27549 [&lt;ffffffff8100c20a&gt;] child_rip+0xa/0x20 :0:(osd_handler. [&lt;ffffffff8109ab60&gt;] ? kthread+0x0/0xa0 c:2925:osd_xattr [&lt;ffffffff8100c200&gt;] ? child_rip+0x0/0x20 _get()) LBUG Kernel panic - not syncing: LBUG Pid: 27549, comm: mdt02_007 Not tainted 2.6.32-431.20.3.el6_lustre. </pre> </div></div> <p>Please see <a href="http://review.whamcloud.com/11649" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/11649</a>.</p> <p>Patch landed to Master.</p> Development Rank 1|hzw51b: Rank (Obsolete) 10930 Severity