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mirror of https://github.com/systemd/systemd-stable.git synced 2025-01-18 06:03:42 +03:00
Martin Wilck 030f457167 udevd: don't use monitor after manager_exit()
If udevd receives an exit signal, it releases its reference on the udev
monitor in manager_exit(). If at this time a worker is hanging, and if
the event timeout for this worker expires before udevd exits, udevd
crashes in on_sigchld()->udev_monitor_send_device(), because the monitor
has already been freed.

Fix this by testing the validity of manager->monitor in on_sigchld().
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systemd - System and Service Manager

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Backports of patch from systemd git to stable distributions
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