[openib-general] [Bug 322] New: 2.6.17 backport: reading the rdma-cm abi file causes fault.

[bugzilla-daemon at lists.openfabrics.org]

https://bugs.openfabrics.org/show_bug.cgi?id=322

           Summary: 2.6.17 backport:  reading the rdma-cm abi file causes
                    fault.
           Product: OpenFabrics Linux
           Version: 1.2
          Platform: X86-64
        OS/Version: SLES 10
            Status: NEW
          Severity: normal
          Priority: P3
         Component: RDMA CM
        AssignedTo: bugzilla at openib.org
        ReportedBy: swise at opengridcomputing.com


I think the misc device patch is broken for 2.6.17.  Everything builds and
loads ok, but when librdmacm (or a user) reads
/sys/class/misc/rdma_cm/abi_file, the system logs this fault:

 [62266.670174] invalid opcode: 0000 [1] SMP
[62266.682226] CPU 0
[62266.688276] Modules linked in: rdma_ucm nfs lockd nfs_acl sunrpc rdma_cm
iw_cm ib_addr ib_local_sa ib_ucm ib_uverbs ib_umad iw_cxgb3 ib_ipoib ib_cm
ib_sa edd button battery ac cxgb3 ib_mthca ib_mad shpchp ib_core pci_hotplug
i2c_i801 e1000 rdma_ne i2c_core fan thermal processor aic79xx
[62266.764826] Pid: 16190, comm: cat Tainted: GF     2.6.17-ofed-1.2 #3
[62266.783832] RIP: 0010:[<ffff81011f273f0a>] [<ffff81011f273f0a>]
[62266.801073] RSP: 0018:ffff81011f273eb0  EFLAGS: 00010203
[62266.817510] RAX: 0000000000000002 RBX: ffff8101421bd848 RCX:
0000000000000001
[62266.838855] RDX: 00000000ffffffff RSI: ffff810103c558f6 RDI:
ffff810083c558f9
[62266.860199] RBP: ffffffff8041508e R08: 00000000ffffffff R09:
0000000000000020
[62266.881542] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff81013dd5f138
[62266.902887] R13: ffff81013dd5f158 R14: ffff81011f273f48 R15:
ffffffff805b18f0
[62266.924232] FS:  00002abb806756d0(0000) GS:ffffffff806e5000(0000)
knlGS:0000000000000000
[62266.948431] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[62266.965621] CR2: 0000000000402f30 CR3: 0000000123782000 CR4:
00000000000006e0
[62266.986966] Process cat (pid: 16190, threadinfo ffff81011f272000, task
ffff810144814850)
[62267.011165] Stack: ffffffff802bddb6 0000000000000000 0000000000001000
000000000050a000
[62267.034690]        ffff810083c55908 ffffffff881d7fa0 ffff8101424ea400
000000000050a000
[62267.058787]        ffff81011f273f48 0000000000001000
[62267.074003] Call Trace: <ffffffff802bddb6>{sysfs_read_file+193}
[62267.091845]        <ffffffff8027f513>{vfs_read+204}
<ffffffff8027f917>{sys_read+71}
[62267.114927]        <ffffffff80209aaa>{system_call+126}
[62267.130946]
[62267.130947] Code: 27 1f 01 81 ff ff 13 f5 27 80 ff ff ff ff 00 a4 4e 42 01
81
[62267.157535] RIP [<ffff81011f273f0a>] RSP <ffff81011f273eb0>


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