In xdr_nfs_fh3(), I see that fh = (file_handle_v3_t
*)objp->data.data_val;
>From the core stack trace,
(gdb) print *objp
$2 = {data = {data_len = 0, data_val = 0x0}}
So this is the case of a zero-length file handle. This core is from a
customer site, I do not have a recreate.
I have the core, let me know if you want me to look at any other
information in it.
Regards.
Krishna Harathi
On Wed, May 4, 2016 at 8:26 AM, Soumya Koduri <[email protected]> wrote:
>
>
> On 05/04/2016 08:30 PM, Soumya Koduri wrote:
>
>> Hi Malahal,
>>
>> On 05/04/2016 07:37 PM, Malahal Naineni wrote:
>>
>>> Soumya Koduri [[email protected]] wrote:
>>>
>>>> Hi Krishna,
>>>>
>>>> yes. We had been reported similar issue earlier and Frank submitted a
>>>> patch to fix it [1]. I think the fix is available in V2.3.1 or later
>>>> branches.
>>>>
>>>> Thanks,
>>>> Soumya
>>>>
>>>
>>> Soumya, is this zero length file handle case? If so, can anyone explain
>>> why we got a zero length file handle? (maybe some NFS client bug???)
>>>
>>>
>> yes. It is because of zero length file handle.
>>
>
> Sorry correction. We had suspected that the user could have hit the crash
> because of zero length filehandle. We couldn't debug the core they produced
> because of missing debuginfos.
>
> Krishna,
> Can you confirm it if you happen to have a core.
>
> Thanks,
> Soumya
>
>
> Unfortunately, even we
>
>> couldn't figure out why/how it has happened. We had been reported about
>> this from a user and from code-inspection we found a possible bug in
>> XDR_DECODE & could reproduce the issue by injecting errors via gdb.
>>
>> Krishna,
>> Do you have any insights on when exactly(in what scenarios) you hit this
>> crash?
>>
>> Thanks,
>> Soumya
>>
>> Regards, Malahal.
>>>
>>>
>>>> [1] https://review.gerrithub.io/#/c/263358/
>>>>
>>>> On 04/29/2016 07:09 AM, Krishna Harathi wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> We are using Ganesha 2.3.0, hitting this crash. I see that we have a
>>>>> 2.3.2 as well as other fixes in the main branch. Before I start
>>>>> browsing
>>>>> all the commits, does this stack trace looks familiar, this issue is
>>>>> already fixed in 2.3.2 or later?
>>>>>
>>>>> #0 0x000000000049abbd in xdr_nfs_fh3 (xdrs=0x7fe288a47bd8,
>>>>> objp=0x7fe288a483f0) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/Protocols/XDR/xdr_nfs23.c:465
>>>>> #1 0x000000000049b3f2 in xdr_diropargs3 (xdrs=0x7fe288a47bd8,
>>>>> objp=0x7fe288a483f0) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/Protocols/XDR/xdr_nfs23.c:835
>>>>> #2 0x000000000049b6fb in xdr_LOOKUP3args (xdrs=0x0,
>>>>> objp=0x7fe288a483f0) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/Protocols/XDR/xdr_nfs23.c:1014
>>>>> #3 0x00007fe29ce88231 in svcauth_none_wrap (auth=0x7fe29d0af680,
>>>>> req=0x7fe288a48230, xdrs=0x7fe288a47bd8, xdr_func=0x49b6dd
>>>>> <xdr_LOOKUP3args>, xdr_ptr=0x7fe288a483f0 "")
>>>>> at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/libntirpc/src/svc_auth_none.c:66
>>>>> #4 0x00007fe29ce8fe3c in svc_vc_getargs (xprt=0x7fe288a47f80,
>>>>> req=0x7fe288a48230, xdr_args=0x49b6dd <xdr_LOOKUP3args>,
>>>>> args_ptr=0x7fe288a483f0, u_data=0x7fe288a483e8)
>>>>> at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/libntirpc/src/svc_vc.c:947
>>>>> #5 0x000000000044e266 in nfs_rpc_get_args
>>>>> (reqnfs=0x7fe288a48228)
>>>>> at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/MainNFSD/nfs_rpc_dispatcher_thread.c:2122
>>>>> #6 0x000000000044d6eb in thr_decode_rpc_request (context=0x0,
>>>>> xprt=0x7fe288a47f80) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1869
>>>>> #7 0x000000000044d891 in thr_decode_rpc_requests
>>>>> (thr_ctx=0x7fe28980e080) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1915
>>>>> #8 0x000000000050f338 in fridgethr_start_routine
>>>>> (arg=0x7fe28980e080) at
>>>>>
>>>>> /home/kharathi/source1/oneblox/repos/packaging/nfs-ganesha-2.3.0/nfs-ganesha-2.3.0/src/support/fridgethr.c:561
>>>>> #9 0x00007fe29d2beb50 in start_thread () from
>>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>>> #10 0x00007fe29c99c7bd in clone () from
>>>>> /lib/x86_64-linux-gnu/libc.so.6
>>>>> #11 0x0000000000000000 in ?? ()
>>>>> (gdb) print objp
>>>>> $1 = (nfs_fh3 *) 0x7fe288a483f0
>>>>> (gdb) print *objp
>>>>> $2 = {data = {data_len = 0, data_val = 0x0}}
>>>>> (gdb) print *xdrs
>>>>> $3 = {x_op = XDR_DECODE, x_ops = 0x7fe29d0adfc0, x_public =
>>>>> 0x7fe288a483e8, x_private = 0x7fe28881c0e0, x_lib = {0x2,
>>>>> 0x7fe288a47f80}, x_base = 0x0, x_v = {vio_base = 0x0, vio_head =
>>>>> 0x0, vio_tail = 0x0, vio_wrap = 0x0},
>>>>> x_handy = 0, x_flags = 1}
>>>>>
>>>>>
>>>>>
>>>>> Thanks in advance.
>>>>>
>>>>> Regards.
>>>>> Krishna Harathi
>>>>>
>>>>>
>>>>>
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