SUMMARY k3b segfaults when adding a big file to a data project STEPS TO REPRODUCE 1. create a file of around 25GB with `fallocate -l 24864 testfile` or `dd if=/dev/zero of=testfile bs=1MB count=24846 2. create a new data project in k3b 3. add the testfile to the project OBSERVED RESULT Segfault. backtrace in gdb: (K3b::DataUrlAddingDialog) using locale codec: UTF-8 K3b::Iso9660::openArchive no volume descriptors Thread 1 "k3b" received signal SIGSEGV, Segmentation fault. 0x00007ffff7e00830 in K3b::ExternalBin::hasFeature(QString const&) const () from /usr/lib/libk3blib.so.7 ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── registers ──── $rax : 0x0000555555dde940 → 0x0000000c00000001 $rbx : 0x00007fffffffdb70 → 0x0000555555dc42e0 → 0x0000000700000001 $rcx : 0x0 $rdx : 0x74 $rsp : 0x00007fffffffd948 → 0x00005555556db1f9 → mov rdi, QWORD PTR [rsp+0x230] $rbp : 0x0000555555faf0b0 → 0x00005555557a8130 → 0x00005555555c4580 → mov rdi, QWORD PTR [rdi+0x8] $rsi : 0x00007fffffffdb80 → 0x0000555555dde940 → 0x0000000c00000001 $rdi : 0x0 $rip : 0x00007ffff7e00830 → <K3b::ExternalBin::hasFeature(QString+0> mov rdi, QWORD PTR [rdi+0x8] $r8 : 0x0000555555dde970 → 0x0000000200000000 $r9 : 0x000055555576394d → 0x655200203e2d2000 $r10 : 0x8 $r11 : 0x2 $r12 : 0x8000 $r13 : 0x0000555555faf108 → 0x0000555555f25110 → 0x0000000200000001 $r14 : 0x0 $r15 : 0x0 $eflags: [zero carry parity adjust sign trap INTERRUPT direction overflow RESUME virtualx86 identification] $cs: 0x0033 $ss: 0x002b $ds: 0x0000 $es: 0x0000 $fs: 0x0000 $gs: 0x0000 ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── stack ──── 0x00007fffffffd948│+0x0000: 0x00005555556db1f9 → mov rdi, QWORD PTR [rsp+0x230] ← $rsp 0x00007fffffffd950│+0x0008: 0x0000000000000068 ("h"?) 0x00007fffffffd958│+0x0010: 0x0000555555fac901 → 0x0000000073007200 0x00007fffffffd960│+0x0018: 0x00007fffe4007760 → 0x00007ffff7f7eb48 → 0x00007ffff7eccab0 → lea rax, [rip+0xb2091] # 0x7ffff7f7eb48 0x00007fffffffd968│+0x0020: 0x00007fffffffdb80 → 0x0000555555dde940 → 0x0000000c00000001 0x00007fffffffd970│+0x0028: 0x00007fffffffda58 → 0x0000555555ee2b90 → 0xffffffff00000004 0x00007fffffffd978│+0x0030: 0x00007fffffffda60 → 0x0000555555dde850 → 0x0000555500000001 0x00007fffffffd980│+0x0038: 0x0000000000000000 ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── code:x86:64 ──── 0x7ffff7e00826 <K3b::ExternalBin::path()+0> ror BYTE PTR [rax], 0xc3 0x7ffff7e00829 nop 0x7ffff7e0082a nop WORD PTR [rax+rax*1+0x0] → 0x7ffff7e00830 <K3b::ExternalBin::hasFeature(QString+0> mov rdi, QWORD PTR [rdi+0x8] 0x7ffff7e00834 <K3b::ExternalBin::hasFeature(QString+0> mov edx, 0x1 0x7ffff7e00839 <K3b::ExternalBin::hasFeature(QString+0> add rdi, 0x28 0x7ffff7e0083d <K3b::ExternalBin::hasFeature(QString+0> jmp QWORD PTR [rip+0x17f9cd] # 0x7ffff7f80210 0x7ffff7e00843 nop 0x7ffff7e00844 data16 nop WORD PTR cs:[rax+rax*1+0x0] ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── threads ──── [#0] Id 1, Name: "k3b", stopped, reason: SIGSEGV [#1] Id 2, Name: "QXcbEventQueue", stopped, reason: SIGSEGV [#2] Id 3, Name: "QDBusConnection", stopped, reason: SIGSEGV [#0] 0x7ffff7e00830 → K3b::ExternalBin::hasFeature(QString const&) const() [#1] 0x5555556db1f9 → mov rdi, QWORD PTR [rsp+0x230] [#2] 0x5555556dca22 → mov rax, QWORD PTR [rbp+0x58] [#3] 0x7ffff608344a → QObject::event(QEvent*)() [#4] 0x7ffff6a5408b → QWidget::event(QEvent*)() [#5] 0x7ffff6a104f5 → QApplicationPrivate::notify_helper(QObject*, QEvent*)() [#6] 0x7ffff6a19e11 → QApplication::notify(QObject*, QEvent*)() [#7] 0x7ffff60569c2 → QCoreApplication::notifyInternal2(QObject*, QEvent*)() [#8] 0x7ffff6059739 → QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)() [#9] 0x7ffff60af404 → mov rdi, QWORD PTR [rbx+0x68] ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── gef➤ bt #0 0x00007ffff7e00830 in K3b::ExternalBin::hasFeature(QString const&) const () at /usr/lib/libk3blib.so.7 #1 0x00005555556db1f9 in () #2 0x00005555556dca22 in () #3 0x00007ffff608344a in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5 #4 0x00007ffff6a5408b in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5 #5 0x00007ffff6a104f5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5 #6 0x00007ffff6a19e11 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5 #7 0x00007ffff60569c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5 #8 0x00007ffff6059739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5 #9 0x00007ffff60af404 in () at /usr/lib/libQt5Core.so.5 #10 0x00007ffff021a3ae in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0 #11 0x00007ffff021c1c1 in () at /usr/lib/libglib-2.0.so.0 #12 0x00007ffff021c201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #13 0x00007ffff60aea03 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #14 0x00007ffff60554ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #15 0x00007ffff605d326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5 #16 0x00005555555c3780 in () #17 0x00007ffff5a3fee3 in __libc_start_main () at /usr/lib/libc.so.6 #18 0x00005555555c39fe in _start () EXPECTED RESULT big file is added to project. No crash. SOFTWARE/OS VERSIONS Linux: Arch Linux (available in About System) KDE Frameworks Version: 5.62.0 Qt Version: 5.13.1 (built against 5.13.1) ADDITIONAL INFORMATION This used to work fine before.
The version tested is actually reporting: 19.08.1
Git commit 787aaa1f4a28bbf6d76f7c35c39f4c7dfa874ac0 by Albert Astals Cid. Committed on 16/09/2019 at 20:49. Pushed by aacid into branch 'Applications/19.08'. Fix crash when adding big files and mkisofs is not installed M +2 -1 src/projects/k3bdataurladdingdialog.cpp https://commits.kde.org/k3b/787aaa1f4a28bbf6d76f7c35c39f4c7dfa874ac0