[Bugs] [Bug 1434332] New: crash from write-behind

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1434332

            Bug ID: 1434332
           Summary: crash from write-behind
           Product: GlusterFS
           Version: mainline
         Component: write-behind
          Assignee: bugs at gluster.org
          Reporter: ravishankar at redhat.com
                CC: bugs at gluster.org



Description of problem:

Core file created while running tests/basic/afr-heal-quota.t

Version-Release number of selected component (if applicable):
master

How reproducible:
Only once. Not able to recreate.

127:root at vm4 regression$ gdb -ex 'set sysroot ./' -ex 'core-file
build/install/cores/glusterfs-7968.core' ./build/install/sbin/glusterfsd

(gdb) bt
#0  0x00007fa6bebe9470 in pthread_mutex_lock () from ./lib64/libpthread.so.0
#1  0x00007fa6b1688b56 in wb_add_head_for_retry (head=0x7fa69c083700) at
/home/jenkins/root/workspace/centos6-regression/xlators/performance/write-behind/src/write-behind.c:814
#2  0x00007fa6b16891fd in wb_fulfill_short_write (head=0x7fa69c083700, size=0)
at
/home/jenkins/root/workspace/centos6-regression/xlators/performance/write-behind/src/write-behind.c:1031
#3  0x00007fa6b1689296 in wb_fulfill_cbk (frame=0x7fa6a4014a30,
cookie=0x7fa6a4005ea0, this=0x7fa6ac00e960, op_ret=106496, op_errno=0,
prebuf=0x7fa6a401c3e0, postbuf=0x7fa6a401c450, xdata=0x7fa6a400f760)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/performance/write-behind/src/write-behind.c:1052
#4  0x00007fa6b1914100 in dht_writev_cbk (frame=0x7fa6a4005ea0,
cookie=0x7fa6ac00b920, this=0x7fa6ac00d2e0, op_ret=106496, op_errno=0,
prebuf=0x7fa6a401c3e0, postbuf=0x7fa6a401c450, xdata=0x7fa6a400f760)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-inode-write.c:106
#5  0x00007fa6b1b760d5 in afr_writev_unwind (frame=0x7fa6a400b410,
this=0x7fa6ac00b920) at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/afr/src/afr-inode-write.c:247
#6  0x00007fa6b1b765af in afr_writev_wind_cbk (frame=0x7fa6a4005260,
cookie=0x1, this=0x7fa6ac00b920, op_ret=106496, op_errno=0,
prebuf=0x7fa6ab6fe860, postbuf=0x7fa6ab6fe7f0, xdata=0x7fa6a400f760)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/afr/src/afr-inode-write.c:394
#7  0x00007fa6b1e14a33 in client3_3_writev_cbk (req=0x7fa6a4001820,
iov=0x7fa6a4001860, count=1, myframe=0x7fa6a400bda0) at
/home/jenkins/root/workspace/centos6-regression/xlators/protocol/client/src/client-rpc-fops.c:858
#8  0x00007fa6bf6d470e in rpc_clnt_handle_reply (clnt=0x7fa6ac049d90,
pollin=0x7fa6a4016e10) at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-clnt.c:793
#9  0x00007fa6bf6d4cd8 in rpc_clnt_notify (trans=0x7fa6ac049f90,
mydata=0x7fa6ac049dc0, event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7fa6a4016e10)
at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-clnt.c:986
#10 0x00007fa6bf6d0d6c in rpc_transport_notify (this=0x7fa6ac049f90,
event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7fa6a4016e10) at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-transport.c:538
#11 0x00007fa6b42872d2 in socket_event_poll_in (this=0x7fa6ac049f90) at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-transport/socket/src/socket.c:2273
#12 0x00007fa6b428787f in socket_event_handler (fd=10, idx=3,
data=0x7fa6ac049f90, poll_in=1, poll_out=0, poll_err=0) at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-transport/socket/src/socket.c:2409
#13 0x00007fa6bf97f13a in event_dispatch_epoll_handler (event_pool=0x202eef0,
event=0x7fa6ab6fee70) at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/event-epoll.c:572
#14 0x00007fa6bf97f566 in event_dispatch_epoll_worker (data=0x7fa6ac049ad0) at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/event-epoll.c:675
#15 0x00007fa6bebe7aa1 in start_thread () from ./lib64/libpthread.so.0
#16 0x00007fa6be550aad in clone () from ./lib64/libc.so.6
(gdb) #
(gdb)
(gdb)
(gdb) f 1
#1  0x00007fa6b1688b56 in wb_add_head_for_retry (head=0x7fa69c083700) at
/home/jenkins/root/workspace/centos6-regression/xlators/performance/write-behind/src/write-behind.c:814
warning: Source file is more recent than executable.
814             LOCK (&head->wb_inode->lock);
(gdb) l
809     wb_add_head_for_retry (wb_request_t *head)
810     {
811             if (!head)
812                     goto out;
813
814             LOCK (&head->wb_inode->lock);
815             {
816                     __wb_add_head_for_retry (head);
817             }
818             UNLOCK (&head->wb_inode->lock);
(gdb) p head->wb_inode->lock
$1 = {spinlock = 0, mutex = {__data = {__lock = 0, __count = 0, __owner = 0,
__nusers = 0, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}},
__size = '\000' <repeats 39 times>, __align = 0}}
(gdb)

Everything seems to be zero in the lock structure.

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