[Bugs] [Bug 1593199] Stack overflow in readdirp with parallel-readdir enabled

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1593199



--- Comment #1 from Nithya Balachandran <nbalacha at redhat.com> ---
(gdb) bt
#0  0x00007f0f440b4029 in _gf_msg (domain=0x0, file=0x0, function=0x0, line=0,
level=GF_LOG_NONE, errnum=0, trace=0, msgid=0, 
    fmt=0x7f0f363a68c8 "stack-address: %p, winding from %s to %s") at
logging.c:2039
#1  0x00007f0f36359692 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f34275220, xdata=0x7f0f0c001960) at dht-common.c:5388
#2  0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c2915a0,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=295, off=20426,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#3  0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f34275510, xdata=0x7f0f0c001960) at dht-common.c:5388
#4  0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c291490,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=295, off=20420,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#5  0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f34275800, xdata=0x7f0f0c001960) at dht-common.c:5388
#6  0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c291380,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=295, off=20414,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#7  0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f34275af0, xdata=0x7f0f0c001960) at dht-common.c:5388



....




#665 0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f342b2160, xdata=0x7f0f0c001960) at dht-common.c:5388
#666 0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c27a0f0,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=295, off=18426,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#667 0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=1, op_errno=0, 
    orig_entries=0x7f0f342b2450, xdata=0x7f0f0c001960) at dht-common.c:5388
#668 0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c000a70,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=295, off=18420,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#669 0x00007f0f36359718 in dht_readdirp_cbk (frame=0x7f0f0c0016e0,
cookie=0x7f0f249dbaf0, this=0x7f0f24aa55c0, op_ret=22, op_errno=0, 
    orig_entries=0x7f0f342b2740, xdata=0x7f0f0c001960) at dht-common.c:5388
#670 0x00007f0f35cca8de in rda_readdirp (frame=0x7f0f0c0012d0,
this=0x7f0f249dbaf0, fd=0x7f0f247d3790, size=4096, off=18288,
xdata=0x7f0f0c001960)
    at readdir-ahead.c:266
#671 0x00007f0f3635af0f in dht_do_readdir (frame=0x7f0f0c0016e0,
this=0x7f0f24aa55c0, fd=0x7f0f247d3790, size=4096, yoff=18288, whichop=40, 
    dict=0x7f0f0c001960) at dht-common.c:5607
#672 0x00007f0f3635b639 in dht_readdirp (frame=0x7f0f0c0016e0,
this=0x7f0f24aa55c0, fd=0x7f0f247d3790, size=4096, yoff=18288,
dict=0x7f0f0c001960)
    at dht-common.c:5657
#673 0x00007f0f360f07a4 in wb_readdirp (frame=0x7f0f0c005b40,
this=0x7f0f241f0690, fd=0x7f0f247d3790, size=4096, off=18288,
xdata=0x7f0f0c001960)
    at write-behind.c:2514
#674 0x00007f0f4416dd38 in default_readdirp (frame=0x7f0f0c005b40,
this=0x7f0f249eb5b0, fd=0x7f0f247d3790, size=4096, off=18288,
xdata=0x7f0f0c001960)
    at defaults.c:2755
#675 0x00007f0f35abb497 in ioc_readdirp (frame=0x7f0f0c0042c0,
this=0x7f0f240566b0, fd=0x7f0f247d3790, size=4096, offset=18288,
dict=0x7f0f0c001960)
    at io-cache.c:1449
#676 0x00007f0f358a9de8 in qr_readdirp (frame=0x7f0f0c003690,
this=0x7f0f24057260, fd=0x7f0f247d3790, size=4096, offset=18288,
xdata=0x7f0f0c001960)
---Type <return> to continue, or q <return> to quit---
    at quick-read.c:532
#677 0x00007f0f4416dd38 in default_readdirp (frame=0x7f0f0c003690,
this=0x7f0f24a9cfd0, fd=0x7f0f247d3790, size=4096, off=18288,
xdata=0x7f0f0c001960)
    at defaults.c:2755
#678 0x00007f0f35492cfe in mdc_readdirp (frame=0x7f0f0c0041b0,
this=0x7f0f24a9db80, fd=0x7f0f247d3790, size=4096, offset=18288,
xdata=0x7f0f0c001960)
    at md-cache.c:2409
#679 0x00007f0f44168931 in default_readdirp_resume (frame=0x7f0f1c707670,
this=0x7f0f249e0dd0, fd=0x7f0f247d3790, size=4096, off=18288, xdata=0x0)
    at defaults.c:2019
#680 0x00007f0f440d153b in call_resume_wind (stub=0x7f0f1c03b370) at
call-stub.c:2163
#681 0x00007f0f440e0c49 in call_resume (stub=0x7f0f1c03b370) at
call-stub.c:2512
#682 0x00007f0f3527a039 in iot_worker (data=0x7f0f249dc6a0) at io-threads.c:224
#683 0x00007f0f42f00dc5 in start_thread () from /lib64/libpthread.so.0
#684 0x00007f0f4284573d in clone () from /lib64/libc.so.6
(gdb) 






Notice how only one entry is returned each time by rda.

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