CVE-2023-52633

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> um: time-travel: fix time corruption<br /> <br /> In &amp;#39;basic&amp;#39; time-travel mode (without =inf-cpu or =ext), we<br /> still get timer interrupts. These can happen at arbitrary<br /> points in time, i.e. while in timer_read(), which pushes<br /> time forward just a little bit. Then, if we happen to get<br /> the interrupt after calculating the new time to push to,<br /> but before actually finishing that, the interrupt will set<br /> the time to a value that&amp;#39;s incompatible with the forward,<br /> and we&amp;#39;ll crash because time goes backwards when we do the<br /> forwarding.<br /> <br /> Fix this by reading the time_travel_time, calculating the<br /> adjustment, and doing the adjustment all with interrupts<br /> disabled.