[LU-7782] sanity-scrub test_2: NULL pointer dereference at 0x10 in lu_context_key_get() on mds2

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: Maloo

Description

This issue was created by maloo for Andreas Dilger <[e-mail]>

This issue relates to the following test suite run: https://testing.hpdd.intel.com/test_sets/f0270640-d4f4-11e5-9e3f-5254006e85c2.

This is testing patch http://review.whamcloud.com/18442 which is changing sanity-scrub.sh scrub_prep() to use test_mkdir -i instead of mkdir and lfs mkdir explicitly for testing, so that it works with the upstream kernel (which doesn't have DNE support).

The sub-test test_2 failed with the following error on MDS2:

08:17:18:LustreError: 29698:0:(client.c:1133:ptlrpc_import_delay_req()) Skipped 40 previous similar messages
08:17:18:BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
08:17:18:IP: [<ffffffffa057bb57>] lu_context_key_get+0x1
08:17:18:CPU 0 
08:17:18:Pid: 29699, comm: osp_up2-1 Not tainted 2.6.32-573.12.1.el6_lustre.g93f956d.x86_64 #1 Red Hat KVM
08:17:18:Call Trace:
08:17:18: [<ffffffffa09ee83f>] fld_local_lookup+0x4f/0x290 [fld]
08:17:18: [<ffffffffa09eec83>] fld_server_lookup+0x53/0x330 [fld]
08:17:18: [<ffffffffa0e6e38f>] lod_fld_lookup+0x34f/0x520 [lod]
08:17:18: [<ffffffffa0e84243>] lod_object_init+0x103/0x3c0 [lod]
08:17:18: [<ffffffffa057f198>] lu_object_alloc+0xd8/0x320 [obdclass]
08:17:18: [<ffffffffa0580581>] lu_object_find_try+0x151/0x260 [obdclass]
08:17:18: [<ffffffffa0580741>] lu_object_find_at+0xb1/0xe0 [obdclass]
08:17:18: [<ffffffffa05807af>] lu_object_find_slice+0x1f/0x80 [obdclass]
08:17:18: [<ffffffffa0f79a4e>] osp_trans_stop_cb+0x1be/0x2d0 [osp]
08:17:18: [<ffffffffa0f7b2be>] osp_update_interpret+0x21e/0x4a0 [osp]
08:17:18: [<ffffffffa07900b5>] ptlrpc_check_set+0x615/0x1da0 [ptlrpc]
08:17:18: [<ffffffffa0791b9a>] ptlrpc_set_wait+0x35a/0x960 [ptlrpc]
08:17:18: [<ffffffffa0792221>] ptlrpc_queue_wait+0x81/0x220 [ptlrpc]
08:17:18: [<ffffffffa0f7b9c6>] osp_send_update_req+0x256/0x850 [osp]
08:17:18: [<ffffffffa0f7c63f>] osp_send_update_thread+0x20f/0x7ac [osp]
08:17:18: [<ffffffff810a0fce>] kthread+0x9e/0xc0

Please provide additional information about the failure here.

It shouldn't be possible to cause the node to crash, no matter how the test directories are being created.

Info required for matching: sanity-scrub 2

Issue Links

• is related to: LU-7935 MDS crash with NULL pointer dereference at 0000000000000010
• is related to: LU-8399 MDT hung at lu_object_find_at during umount
• is related to: LU-8416 sanity-scrub test_4c: Auto trigger full scrub unexpectedly
• is related to: LU-7746 skip test of new functionality on upstream client