Applications seg fault in select() and poll()

[Rumko <rumcic@xxxxxxxxx>]

On recent -master I have noticed that I can make knode (from kde3) crash (bus
error) in select() repeatably and have even managed to crash firefox once. All
crashes seem to be identical.

knode:
Program terminated with signal 10, Bus error.
#0  0x29f7a03b in select () at select.S:2
2       RSYSCALL(select)
(gdb) bt
#0  0x29f7a03b in select () at select.S:2
#1  0x29cf1d8b in __select (numfds=1024, readfds=0xbf9feee0, writefds=0x0,
exceptfds=0xbf9fee60, timeout=0xbf9fef60)
    at /usr/src/lib/libthread_xu/thread/thr_syscalls.c:518
#2  0x293430d3 in KSocks::select (this=0x2a9474c8, n=1024, readfds=0xbf9feee0,
writefds=0x0, exceptfds=0xbf9fee60, timeout=0x4) at ksocks.cpp:576
#3  0x2812b280 in KNProtocolClient::waitForWork() ()
from /usr/pkg/lib/libknodecommon.so.3
#4  0x2812b499 in KNProtocolClient::run() ()
from /usr/pkg/lib/libknodecommon.so.3
#5  0x29688679 in QThreadInstance::start (_arg=0x2aa63fa4) at
kernel/qthread_unix.cpp:119
#6  0x29cf3eb7 in thread_start (arg=0x2a020cb0)
at /usr/src/lib/libthread_xu/thread/thr_create.c:242
#7  0x00000000 in ?? ()

firefox:
(gdb) bt
#0  0x2a67691b in poll () at poll.S:2
#1  0x28094fc2 in __poll (fds=0xbf9feb24, nfds=1, timeout=-1)
at /usr/src/lib/libthread_xu/thread/thr_syscalls.c:407
#2  0x29b4ac7c in _pr_poll_with_poll (pds=0x2aed0c68, npds=1,
timeout=4294967295) at ptio.c:3915
#3  PR_Poll (pds=0x2aed0c68, npds=1, timeout=4294967295) at ptio.c:4317
#4  0x28555b01 in nsSocketTransportService::Poll (this=0x2aed0780, wait=1,
interval=0xbf9fedb4) at nsSocketTransportService2.cpp:355
#5  0x285568c4 in nsSocketTransportService::DoPollIteration (this=0x2aed0780,
wait=1) at nsSocketTransportService2.cpp:660
#6  0x28556c0b in nsSocketTransportService::OnProcessNextEvent
(this=0x2aed0780, thread=0x2ac12500, mayWait=1, depth=1)
    at nsSocketTransportService2.cpp:539
#7  0x296ac231 in nsThread::ProcessNextEvent (this=0x2ac12500, mayWait=1,
result=0xbf9fee6c) at nsThread.cpp:508
#8  0x29647714 in NS_ProcessNextEvent_P (thread=0x0, mayWait=1) at
nsThreadUtils.cpp:250
#9  0x285573b1 in nsSocketTransportService::Run (this=0x2aed0780) at
nsSocketTransportService2.cpp:581
#10 0x296ac33f in nsThread::ProcessNextEvent (this=0x2ac12500, mayWait=1,
result=0xbf9fef2c) at nsThread.cpp:527
#11 0x29647714 in NS_ProcessNextEvent_P (thread=0x0, mayWait=1) at
nsThreadUtils.cpp:250
#12 0x296ad7dd in nsThread::ThreadFunc (arg=0x2ac12500) at nsThread.cpp:254
#13 0x29b50122 in _pt_root (arg=0x2ac504d0) at ptthread.c:228
#14 0x28096eb7 in thread_start (arg=0x2ab90690)
at /usr/src/lib/libthread_xu/thread/thr_create.c:242
#15 0x00000000 in ?? ()
-- 
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Regards,
Rumko