| Summary: | kded4 hangs on exit when cifs filesystem zombie exists | ||
|---|---|---|---|
| Product: | [Frameworks and Libraries] solid | Reporter: | Wolfgang Rohdewald <wolfgang> |
| Component: | libsolid-fstab | Assignee: | Mario Bensi <nef> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | afiestas, sven.burmeister |
| Priority: | NOR | ||
| Version: | unspecified | ||
| Target Milestone: | 4.11 | ||
| Platform: | Ubuntu | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
> should there be a timeout somewhere?
>
handling the EOF on fd 16 would be sufficient.
Dup of bug 184062 ? *** This bug has been marked as a duplicate of bug 295034 *** |
Version: 4.6 (using KDE 4.6.1) OS: Linux I had a cifs filesystem mounted pointing to a virtualbox guest which was killed. kded4 hangs, eating 100% cpu. strace -p shows an endless list of Process 5717 attached with 3 threads - interrupt to quit [pid 5720] select(7, [6], NULL, NULL, NULL <unfinished ...> [pid 5766] poll([{fd=17, events=POLLIN}, {fd=16, events=POLLIN}], 2, -1 <unfinished ...> [pid 5717] futex(0x26e335c, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5766] <... poll resumed> ) = 1 ([{fd=16, revents=POLLIN}]) [pid 5766] poll([{fd=17, events=POLLIN}, {fd=16, events=POLLIN}], 2, -1) = 1 ([{fd=16, revents=POLLIN}]) [pid 5766] poll([{fd=17, events=POLLIN}, {fd=16, events=POLLIN}], 2, -1) = 1 ([{fd=16, revents=POLLIN}]) [pid 5766] poll([{fd=17, events=POLLIN}, {fd=16, events=POLLIN}], 2, -1) = 1 ([{fd=16, revents=POLLIN}]) attaching gdb shows this backtrace - none of the breakpoints ever triggers: (gdb) info break Num Type Disp Enb Address What 1 breakpoint keep y 0x00007f03050cfe60 in QThread::wait(unsigned long) at thread/qthread_unix.cpp:639 2 breakpoint keep y 0x00007f03050d07b0 in QWaitCondition::wait(QReadWriteLock*, unsigned long) at thread/qwaitcondition_unix.cpp:168 3 breakpoint keep y 0x00007f03050d0c70 in QWaitCondition::wait(QMutex*, unsigned long) at thread/qwaitcondition_unix.cpp:148 (gdb) bt #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 #1 0x00007f03050d0e3b in wait (this=<value optimized out>, mutex=0x27dfd60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88 #2 QWaitCondition::wait (this=<value optimized out>, mutex=0x27dfd60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160 #3 0x00007f03050cfedc in QThread::wait (this=<value optimized out>, time=18446744073709551615) at thread/qthread_unix.cpp:652 #4 0x00007f0305194ee0 in QFileSystemWatcher::~QFileSystemWatcher (this=0x27c7550, __in_chrg=<value optimized out>) at io/qfilesystemwatcher.cpp:440 #5 0x00007f03051d5d5f in QObjectPrivate::deleteChildren (this=0x27e2220) at kernel/qobject.cpp:1957 #6 0x00007f03051dd41b in QObject::~QObject (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qobject.cpp:945 #7 0x00007f02fdfe14d6 in Solid::Backends::Fstab::FstabWatcher::~FstabWatcher (this=0x2666710, __in_chrg=<value optimized out>) at ../../../solid/solid/backends/fstab/fstabwatcher.cpp:51 #8 0x00007f0303d234f2 in __run_exit_handlers (status=1) at exit.c:78 #9 exit (status=1) at exit.c:100 #10 0x00007f03045a2678 in qt_xio_errhandler () at kernel/qapplication_x11.cpp:745 #11 0x00007f0305f84bd8 in KApplication::xioErrhandler (this=0x7fff36938e10, dpy=0x2645750) at ../../kdeui/kernel/kapplication.cpp:417 #12 0x00007f0305a3186e in _XIOError () from /usr/lib/libX11.so.6 #13 0x00007f0305a39415 in ?? () from /usr/lib/libX11.so.6 #14 0x00007f0305a39d07 in _XEventsQueued () from /usr/lib/libX11.so.6 #15 0x00007f0305a2247f in XEventsQueued () from /usr/lib/libX11.so.6 #16 0x00007f03045ddc0c in x11EventSourceCheck (s=0x262b4a0) at kernel/qguieventdispatcher_glib.cpp:87 #17 0x00007f030121066a in g_main_context_check () from /lib/libglib-2.0.so.0 #18 0x00007f0301211023 in ?? () from /lib/libglib-2.0.so.0 #19 0x00007f030121145c in g_main_context_iteration () from /lib/libglib-2.0.so.0 #20 0x00007f03051f0193 in QEventDispatcherGlib::processEvents (this=0x2528cf0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415 #21 0x00007f03045dda4e in QGuiEventDispatcherGlib::processEvents (this=0x26e335c, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204 #22 0x00007f03051c2a02 in QEventLoop::processEvents (this=<value optimized out>, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece. ) at kernel/qeventloop.cpp:149 #23 0x00007f03051c2dec in QEventLoop::exec (this=0x7fff36938d60, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece. ) at kernel/qeventloop.cpp:201 #24 0x00007f03051c6ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009 #25 0x00007f02f609a8c7 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kded/kded.cpp:925 #26 0x0000000000407973 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40aefb "0") at ../../kinit/kinit.cpp:746 #27 0x0000000000409ac3 in main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1861 Reproducible: Didn't try should there be a timeout somewhere?