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This is not a known case (and, in fact, none of that code has changed in
about a year). The issue is that nsm_clnt has been destroyed, but is
being used. I don't see how this can happen, since all accesses to
nsm_clnt are protected by nsm_mutex.
Do you have a reproducer?
Daniel
On 10/10/2018 02:01 AM, Naresh Babu wrote:
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We are running nfs-ganesha 2.6.3 with custom FSAL and ran into this
crash. Is this a known issue with libntirpc 1.6.3? Please advise.
(gdb) bt
#0 0x00007f56e8004510 in ?? ()
#1 0x00007f5769cdb2df in opr_rbtree_insert (head=0x7f56e80016c8,
node=0x7f56a41c6270) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/rbtree.c:271
#2 0x00007f5769cd5e9f in clnt_req_setup (cc=0x7f56a41c6240,
timeout=...) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/clnt_generic.c:515
#3 0x0000000000498c04 in nsm_unmonitor (host=0x7f56e8002940) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/Protocols/NLM/nsm.c:219
#4 0x00000000004cdc16 in dec_nsm_client_ref (client=0x7f56e8002940) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/nlm_owner.c:857
#5 0x00000000004ce574 in free_nlm_client (client=0x7f56e8000e10) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/nlm_owner.c:1039
#6 0x00000000004ce8ea in dec_nlm_client_ref (client=0x7f56e8000e10) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/nlm_owner.c:1130
#7 0x00000000004cf0cd in free_nlm_owner (owner=0x7f56e8002a30) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/nlm_owner.c:1314
#8 0x00000000004aff66 in free_state_owner (owner=0x7f56e8002a30) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/state_misc.c:818
#9 0x00000000004b04f7 in dec_state_owner_ref (owner=0x7f56e8002a30) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/SAL/state_misc.c:968
#10 0x000000000049387b in nlm4_Unlock (args=0x7f56a41c5108,
req=0x7f56a41c4a00, res=0x7f56a41c6070) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/Protocols/NLM/nlm_Unlock.c:127
#11 0x0000000000455e16 in nfs_rpc_process_request
(reqdata=0x7f56a41c4a00) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/MainNFSD/nfs_worker_thread.c:1329
#12 0x00000000004566e4 in nfs_rpc_valid_NLM (req=0x7f56a41c4a00) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/MainNFSD/nfs_worker_thread.c:1596
#13 0x00007f5769cf1329 in svc_vc_decode (req=0x7f56a41c4a00) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_vc.c:815
#14 0x0000000000449570 in nfs_rpc_decode_request (xprt=0x7f570c008230,
xdrs=0x7f56a41c54c0) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1341
#15 0x00007f5769cf123a in svc_vc_recv (xprt=0x7f570c008230) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_vc.c:788
#16 0x00007f5769ceda13 in svc_rqst_xprt_task (wpe=0x7f570c008448) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_rqst.c:751
#17 0x00007f5769cede8d in svc_rqst_epoll_events (sr_rec=0xeb40c0,
n_events=2) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_rqst.c:923
#18 0x00007f5769cee12f in svc_rqst_epoll_loop (sr_rec=0xeb40c0) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_rqst.c:996
#19 0x00007f5769cee1e2 in svc_rqst_run_task (wpe=0xeb40c0) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/svc_rqst.c:1032
#20 0x00007f5769cf72f2 in work_pool_thread (arg=0x7f56fc003cd0) at
/home/vinay/builds/2.6/0916/clfsrepo/external/nfs/src/libntirpc/src/work_pool.c:176
#21 0x00007f576a121e25 in start_thread (arg=0x7f569b1f1700) at
pthread_create.c:308
#22 0x00007f57697e334d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) p head->root
$6 = (struct opr_rbtree_node *) 0x1
(gdb) p node
$7 = (struct opr_rbtree_node *) 0x7f56a41c6270
(gdb) p *node
$8 = {left = 0x6d69546e6f697461, right = 0x30312f3930223d65, parent =
0x373120383130322f, red = 976827450, gen = 539113778}
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