kernel panic on next-20160225

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Hi,

The following panic is triggered when run ocfs2 xattr test on
linux-next-20160225. Did anybody ever see this?

[  254.604228] BUG: unable to handle kernel paging request at
00000002000800c0
[  254.605013] IP: [<ffffffff81192978>] kmem_cache_alloc+0x78/0x160
[  254.605013] PGD 7bbe5067 PUD 0
[  254.605013] Oops: 0000 [#1] SMP
[  254.605013] Modules linked in: ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm
ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi xen_kbdfront xen_netfront xen_fbfront xen_blkfront
[  254.605013] CPU: 2 PID: 4044 Comm: mpirun Not tainted
4.5.0-rc5-next-20160225 #1
[  254.605013] Hardware name: Xen HVM domU, BIOS 4.3.1OVM 05/14/2014
[  254.605013] task: ffff88007a521a80 ti: ffff88007aed0000 task.ti:
ffff88007aed0000
[  254.605013] RIP: 0010:[<ffffffff81192978>]  [<ffffffff81192978>]
kmem_cache_alloc+0x78/0x160
[  254.605013] RSP: 0018:ffff88007aed3a48  EFLAGS: 00010282
[  254.605013] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000001991
[  254.605013] RDX: 0000000000001990 RSI: 00000000024000c0 RDI:
000000000001b330
[  254.605013] RBP: ffff88007aed3a98 R08: ffff88007d29b330 R09:
00000002000800c0
[  254.605013] R10: 0000000c51376d87 R11: ffff8800792cac38 R12:
ffff88007cc30f00
[  254.605013] R13: 00000000024000c0 R14: ffffffff811b053f R15:
ffff88007aed3ce7
[  254.605013] FS:  0000000000000000(0000) GS:ffff88007d280000(0000)
knlGS:0000000000000000
[  254.605013] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  254.605013] CR2: 00000002000800c0 CR3: 000000007aeb2000 CR4:
00000000000406e0
[  254.605013] Stack:
[  254.605013]  0000000013082000 ffff88007aed3d28 0000007900000000
0000000000000001
[  254.605013]  2f2f2f2f00000000 ffff8800792cac00 ffff88007aed3d38
0000000000000101
[  254.605013]  ffff88007a5e2000 ffff88007aed3ce7 ffff88007aed3b08
ffffffff811b053f
[  254.605013] Call Trace:
[  254.605013]  [<ffffffff811b053f>] __d_alloc+0x2f/0x1a0
[  254.605013]  [<ffffffff811a58f2>] ? unlazy_walk+0xe2/0x160
[  254.605013]  [<ffffffff811b1c67>] d_alloc+0x17/0x80
[  254.605013]  [<ffffffff811a5b0a>] lookup_dcache+0x8a/0xc0
[  254.605013]  [<ffffffff81143e63>] ? __alloc_pages_nodemask+0x173/0xeb0
[  254.605013]  [<ffffffff811aa523>] path_openat+0x3c3/0x1210
[  254.605013]  [<ffffffff81354eb3>] ? radix_tree_lookup_slot+0x13/0x30
[  254.605013]  [<ffffffff81139002>] ? find_get_entry+0x32/0xc0
[  254.605013]  [<ffffffff811b4065>] ? atime_needs_update+0x55/0xe0
[  254.605013]  [<ffffffff8113b7a1>] ? filemap_fault+0xd1/0x4b0
[  254.605013]  [<ffffffff81168296>] ? do_set_pte+0xb6/0x140
[  254.605013]  [<ffffffff811ab3f0>] do_filp_open+0x80/0xe0
[  254.605013]  [<ffffffff811b7c48>] ? __alloc_fd+0x48/0x1a0
[  254.605013]  [<ffffffff811a60aa>] ? getname_flags+0x7a/0x1e0
[  254.605013]  [<ffffffff8119a2d0>] do_sys_open+0x110/0x200
[  254.605013]  [<ffffffff8119a3f9>] SyS_open+0x19/0x20
[  254.605013]  [<ffffffff81003ec2>] do_syscall_64+0x72/0x230
[  254.605013]  [<ffffffff8105fc37>] ? __do_page_fault+0x177/0x430
[  254.605013]  [<ffffffff8193bc61>] entry_SYSCALL64_slow_path+0x25/0x25
[  254.605013] Code: 05 e6 77 e7 7e 4d 8b 08 49 8b 40 10 4d 85 c9 0f 84
dd 00 00 00 48 85 c0 0f 84 d4 00 00 00 49 63 44 24 20 49 8b 3c 24 48 8d
4a 01 <49> 8b 1c 01 4c 89 c8 65 48 0f c7 0f 0f 94 c0 3c 01 75 b6 49 63
[  254.605013] RIP  [<ffffffff81192978>] kmem_cache_alloc+0x78/0x160
[  254.605013]  RSP <ffff88007aed3a48>
[  254.605013] CR2: 00000002000800c0
[  254.792273] ---[ end trace 823969e602e4aaac ]---

Thanks,
Junxiao.
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