[Bug 1753799] Re: k3b crashed with SIGSEGV in QString::size()

Thu Dec 17 21:26:01 UTC 2020

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https://bugs.kde.org/show_bug.cgi?id=391610.

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On 2018-03-09T13:47:57+00:00 Cristian Aravena Romero wrote:

Hello,

Open bug in launchpad.net:
https://bugs.launchpad.net/bugs/1753799

"Problem with *privileges*..."

BackTrace:
#0  QString::size (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:233
No locals.
#1  QString::toLocal8Bit() const & (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:520
No locals.
#2  QFile::encodeName (fileName=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qfile.h:89
No locals.
#3  K3b::ExternalBinPermissionModel::Private::getProgramInfo (this=0x563289b16880, program=0x56328a16da20, owner=..., group=..., wantedGroup=..., perm=@0x7fffaf5953b8: 116, wantedPerm=@0x7fffaf5953bc: 14) at ./src/option/k3bexternalbinpermissionmodel.cpp:109
        s = {st_dev = 6, st_ino = 140002289047989, st_nlink = 140736135255488, st_mode = 2310116272, st_uid = 22066, st_gid = 0, __pad0 = 14, st_rdev = 140002288659377, st_size = 665832, st_blksize = 64424509537, st_blocks = 1304, st_atim = {tv_sec = 94775057099008, tv_nsec = 16641}, st_mtim = {tv_sec = 0, tv_nsec = -4616189618054758400}, st_ctim = {tv_sec = 0, tv_nsec = 696204690}, __glibc_reserved = {8156075650671158528, 0, 140736135255488}}
#4  0x00005632889b4567 in K3b::ExternalBinPermissionModel::Private::needChangePermissions (this=<optimized out>, program=<optimized out>) at ./src/option/k3bexternalbinpermissionmodel.cpp:148
        owner = {static null = {<No data fields>}, d = 0x7f54d1b5f0e0}
        group = {static null = {<No data fields>}, d = 0x7f54d1b5f0e0}
        wantedGroup = {static null = {<No data fields>}, d = 0x7f54d1b5f0e0}
        perm = 116
        wantedPerm = 14
#5  0x00005632889b4d8a in K3b::ExternalBinPermissionModel::data (this=0x563289b19230, index=..., role=<optimized out>) at ./src/option/k3bexternalbinpermissionmodel.cpp:243
        program = 0x56328a16da20
#6  0x00007f54d2ce5ae2 in QtPrivate::QVariantValueHelper<QImage>::metaType (v=...) at ../../include/QtCore/../../src/corelib/kernel/qvariant.h:697
        vid = 70
        t = {<QPaintDevice> = {_vptr.QPaintDevice = 0x0, painters = 0, reserved = 0x5632893d7c20}, d = 0x713033976f77a500}
        vid = <optimized out>
        t = <optimized out>
#7  QtPrivate::MetaTypeInvoker<QtPrivate::QVariantValueHelper<QImage>, QVariant const&, QImage>::invoke (a=...) at ../../include/QtCore/../../src/corelib/kernel/qvariant.h:111
No locals.
#8  qvariant_cast<QImage> (v=...) at ../../include/QtCore/../../src/corelib/kernel/qvariant.h:835
No locals.
#9  QStyledItemDelegate::initStyleOption (this=0x56328a159e00, option=0x7fffaf5955c0, index=...) at itemviews/qstyleditemdelegate.cpp:329
        image = {<QPaintDevice> = {_vptr.QPaintDevice = 0x0, painters = 0, reserved = 0x7fffaf595500}, d = 0x7fffaf5955b0}
        value = {d = {data = {c = 0 '\000', uc = 0 '\000', s = 0, sc = 0 '\000', us = 0, i = 0, u = 0, l = 0, ul = 0, b = false, d = 0, f = 0, real = 0, ll = 0, ull = 0, o = 0x0, ptr = 0x0, shared = 0x0}, type = 0, is_shared = 0, is_null = 1}}
#10 0x00007f54d2ce510c in QVariant::Private::Private (this=0x21) at ../../include/QtCore/../../src/corelib/kernel/qvariant.h:373
No locals.
#11 QVariant::QVariant (this=0x21) at ../../include/QtCore/../../src/corelib/kernel/qvariant.h:199
No locals.
#12 QModelIndex::data (arole=10, this=0x7fffaf595678) at ../../include/QtCore/../../src/corelib/itemmodels/qabstractitemmodel.h:432
No locals.
#13 QStyledItemDelegate::editorEvent (this=0x7fffaf5957a0, event=0x7fffaf5955b0, model=0x7fffaf5957c0, option=..., index=...) at itemviews/qstyleditemdelegate.cpp:608
        flags = {i = 2941866936}
        value = {d = {data = {c = 0 '\000', uc = 0 '\000', s = 0, sc = 0 '\000', us = 0, i = 0, u = 0, l = 0, ul = 0, b = false, d = 0, f = 0, real = 0, ll = 0, ull = 0, o = 0x0, ptr = 0x0, shared = 0x0}, type = 1073741823, is_shared = 1, is_null = 1}}
        widget = <optimized out>
        style = <optimized out>
        state = <optimized out>
#14 0x0000000000000002 in ?? ()
No symbol table info available.
#15 0x0000563289b193f0 in ?? ()
No symbol table info available.
#16 0x00007fffaf5957a0 in ?? ()
No symbol table info available.
#17 0x0000000000000001 in ?? ()
No symbol table info available.
#18 0x00007f54d2d2b6e8 in QTreeViewPrivate::updateScrollBars (this=0x7f54d2d28b41 <QTreeView::indexRowSizeHint(QModelIndex const&) const+961>) at itemviews/qtreeview.cpp:3702
        contentsHeight = 1
        q = <optimized out>
        viewportSize = {wd = 1870112000, ht = -1353099328}
        itemsInViewport = <optimized out>
        columnCount = <optimized out>
        viewportWidth = <optimized out>
        columnsInViewport = <optimized out>
#19 0x0000000000000002 in ?? ()
No symbol table info available.
#20 0x00007f54d291e720 in guard variable for (anonymous namespace)::Q_QGS_theFontCache::innerFunction()::holder () from /mnt/sec-machines/apport-sandbox-dir/Ubuntu 18.04/amd64/report-sandbox/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#21 0x00005632893d7c20 in ?? ()
No symbol table info available.
#22 0x0000000000000001 in ?? ()
No symbol table info available.
#23 0x00007f54d2368c7f in qThreadStorage_localData<QFontCache> (d=...) at ../../include/QtCore/../../src/corelib/thread/qthreadstorage.h:71
        v = <optimized out>
        v = <optimized out>
#24 QThreadStorage<QFontCache*>::localData (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qthreadstorage.h:145
No locals.
#25 QFontCache::instance () at text/qfont.cpp:2705
        fontCache = <optimized out>
#26 0x00007f54d2368e83 in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:213
No locals.
#27 QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:207
No locals.
#28 QFontPrivate::engineForScript (this=0x7fff00000000, script=-1978213856) at text/qfont.cpp:207
        locker = {val = 94775058469424}
#29 0x0000000000000001 in ?? ()
No symbol table info available.
#30 0x0000001000000010 in ?? ()
No symbol table info available.
#31 0x00005632893d7c20 in ?? ()
No symbol table info available.
#32 0x000f000100000000 in ?? ()
No symbol table info available.
#33 0x000000006f77a501 in ?? ()
No symbol table info available.
#34 0x00007f54b8008de0 in ?? ()
No symbol table info available.
#35 0x0000563289b193b0 in ?? ()
No symbol table info available.
#36 0xffffffffffffffff in ?? ()
No symbol table info available.
#37 0x0000000000000000 in ?? ()
No symbol table info available.

Regards,
--
Cristian

Reply at:
https://bugs.launchpad.net/ubuntu/+source/k3b/+bug/1753799/comments/5

------------------------------------------------------------------------
On 2018-03-30T13:43:26+00:00 Zhaixiang wrote:

Git commit 1e771f7f3ddf83fd7c3bf78b35247a82ebbb8c2c by Leslie Zhai.
Committed on 30/03/2018 at 13:38.
Pushed by lesliezhai into branch 'master'.

There is k3bfuzzertest to test QFile::encodeName and
 QString::fromRawData using libFuzzer, it might be duplicate of
QTBUG-57553

CCMAIL: caravena at gmail.com

M  +2    -2    tests/k3bfuzzertest.cpp

https://commits.kde.org/k3b/1e771f7f3ddf83fd7c3bf78b35247a82ebbb8c2c

Reply at:
https://bugs.launchpad.net/ubuntu/+source/k3b/+bug/1753799/comments/6

------------------------------------------------------------------------
On 2020-12-17T05:35:37+00:00 Justin Zobel wrote:

Thank you for the crash report.

As it has been a while since this was reported, can you please test and
confirm if this issue is still occurring or if this bug report can be
marked as resolved.

I have set the bug status to "needsinfo" pending your response, please
change back to "reported" or "resolved/worksforme" when you respond,
thank you.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/k3b/+bug/1753799/comments/7

** Changed in: k3b
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1753799

Title:
  k3b crashed with SIGSEGV in QString::size()

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