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Bug#953401: libqt5dbus5: crash on exit due to use-after-free of a QSocketNotifier



Package: libqt5dbus5
Version: 5.12.5+dfsg-9
Severity: normal

Dear Maintainer,

while debugging another crash with valgrind, I noticed errors of invalid
access in the thread used by QDBus. It seems the event loop is still
expecting input on a socket, whose socket notifier should have been
deleted and unregistered. Note that this is not directly related to the
other crash, or at least I don't know how it could be (if anything, it
should cause a deadlock).

The backtrace is here:

Attachment: bine0WO87uEbP.bin
Description: Binary data

Do you have any ideas why this could be?

Regards
    Jiri Palecek

-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: i386 (i686)
Foreign Architectures: amd64

Kernel: Linux 5.5.0-rc5-686-pae (SMP w/2 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=cs_CZ, LC_CTYPE=cs_CZ (charmap=ISO-8859-2), LANGUAGE=cs_CZ (charmap=ISO-8859-2)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libqt5dbus5 depends on:
ii  libc6                             2.29-8
ii  libdbus-1-3                       1.12.16-2
ii  libqt5core5a [qtbase-abi-5-12-5]  5.12.5+dfsg-9
ii  libstdc++6                        10-20200222-1

libqt5dbus5 recommends no packages.

libqt5dbus5 suggests no packages.

-- no debconf information

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