Continue debugging the issue.
Installed the debug symbol for kup-backup:
sudo dpkg -i kup-backup-dbgsym_0.10.0-1+b1_amd64.deb
Run kup-daemon using gdb
gdb kup-daemon
and put breakpoints when printing out to stdout/stderr
(gdb) b write if 1==$rdi
(gdb) b write if 2==$rdi
After start a new backup:
(gdb) bt
#0 __GI___libc_write (fd=2, buf=0x7fffffffca40, nbytes=35) at ../sysdeps/unix/sysv/linux/write.c:26
#1 0x00007ffff5a955f5 in _IO_new_file_write (f=0x7ffff5bf24e0 <_IO_2_1_stderr_>, data=0x7fffffffca40, n=35) at ./libio/fileops.c:1182
#2 0x00007ffff5a938d2 in new_do_write (fp=fp@entry=0x7ffff5bf24e0 <_IO_2_1_stderr_>, data=data@entry=0x7fffffffca40 "Broken filename passed to function\n", to_do=to_do@entry=35) at ./libio/libioP.h:1041
#3 0x00007ffff5a957f9 in _IO_new_file_xsputn (f=0x7ffff5bf24e0 <_IO_2_1_stderr_>, data=<optimized out>, n=35) at ./libio/fileops.c:1256
#4 _IO_new_file_xsputn (f=0x7ffff5bf24e0 <_IO_2_1_stderr_>, data=<optimized out>, n=35) at ./libio/fileops.c:1198
#5 0x00007ffff5a641d2 in __printf_buffer_flush_to_file (buf=buf@entry=0x7fffffffca10) at ../libio/libioP.h:1041
#6 0x00007ffff5a64290 in __printf_buffer_to_file_done (buf=buf@entry=0x7fffffffca10) at ./stdio-common/printf_buffer_to_file.c:120
#7 0x00007ffff5a6ee0d in __vfprintf_internal (s=0x7ffff5bf24e0 <_IO_2_1_stderr_>, format=0x7ffff6448c99 "%s\n", ap=ap@entry=0x7fffffffcb10, mode_flags=2) at ./stdio-common/vfprintf-internal.c:1560
#8 0x00007ffff5b25a3f in ___fprintf_chk (fp=<optimized out>, flag=<optimized out>, format=<optimized out>) at ./debug/fprintf_chk.c:33
#9 0x00007ffff6137065 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#10 0x00007ffff613df21 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#11 0x00007ffff613717b in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#12 0x00007ffff612e781 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#13 0x00007ffff60dc8c9 in QMessageLogger::warning(char const*, ...) const () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#14 0x00007ffff6102bcf in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#15 0x00007ffff614a203 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#16 0x000055555556c1e1 in EDExecutor::ensureAccessible (this=this@entry=0x5555558558c0, pReturnLater=@0x555555855970: false) at ./daemon/edexecutor.cpp:122
#17 0x000055555556c294 in EDExecutor::startBackup (this=0x5555558558c0) at ./daemon/edexecutor.cpp:87
#18 0x00007ffff61ff521 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#19 0x00007ffff7eec24c in ?? () from /lib/x86_64-linux-gnu/libKF6Notifications.so.6
#20 0x00007ffff61ff521 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#21 0x00007ffff7ef8cef in ?? () from /lib/x86_64-linux-gnu/libKF6Notifications.so.6
#22 0x00007ffff61ff521 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#23 0x00007ffff7f07694 in ?? () from /lib/x86_64-linux-gnu/libKF6Notifications.so.6
#24 0x00007ffff7f0814f in ?? () from /lib/x86_64-linux-gnu/libKF6Notifications.so.6
#25 0x00007ffff6f04437 in ?? () from /lib/x86_64-linux-gnu/libQt6DBus.so.6
#26 0x00007ffff61f0c94 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#27 0x00007ffff71b9c48 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt6Widgets.so.6
#28 0x00007ffff61a6928 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#29 0x00007ffff61a6b97 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#30 0x00007ffff6407e37 in ?? () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#31 0x00007ffff51f2385 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ffff51f45b7 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007ffff51f4d20 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007ffff6404dc8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#35 0x00007ffff61afe53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#36 0x00007ffff61a9701 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt6Core.so.6
#37 0x0000555555561b17 in main (argc=<optimized out>, argv=<optimized out>) at ./daemon/main.cpp:60
so EDExecutor::ensureAccessible triggered that message. Function body:
bool EDExecutor::ensureAccessible(bool &pReturnLater)
{
pReturnLater = false; // reset in case we are here for the second time
if (!mStorageAccess) {
return false;
}
if (mStorageAccess->isAccessible()) {
if (!mStorageAccess->filePath().isEmpty()) {
mDestinationPath = mStorageAccess->filePath();
mDestinationPath += QStringLiteral("/");
mDestinationPath += mPlan->mExternalDestinationPath;
QDir lDir(mDestinationPath);
if (!lDir.exists()) {
lDir.mkpath(mDestinationPath);
}
QFileInfo lDestinationInfo(mDestinationPath);
if (lDestinationInfo.exists() && lDestinationInfo.isDir()) {
return true;
}
}
return false;
}
connect(mStorageAccess, &Solid::StorageAccess::accessibilityChanged, this, &EDExecutor::updateAccessibility);
mStorageAccess->setup(); // try to mount it, fail silently for now.
pReturnLater = true;
return false;
}
and the line triggered the issue is if (!lDir.exists()).
Printing out lDir
(gdb) p lDir
$3 = {d_ptr = {d = 0x5555555dfdf0}}
(gdb) p lDir.path()
$4 = {d = {d = 0x5555557bdd10, ptr = 0x5555557bdd20 u"/media/CENSORED/Backup", size = 28}}
Checking out the path:
/bin/ls Backup/ -ald
drwxrwxrwx 1 root root 0 Jan 7 22:53 Backup/
seems have permissions to all. Able to create directory in the Backup disk. Tried to debug furthermore but I cannot find debug symbols for Qt in Debian stable. Any suggestions?
