CVE Published: 02/04/2024 |
CVE Updated: 04/11/2024 |
CVE Year: 2023 Source: Linux |
Vendor: Linux |
Product: Linux Status : PUBLISHED
CVE-2023-52633 Description
In the Linux kernel, the following vulnerability has been resolved:
um: time-travel: fix time corruption
In \'basic\' time-travel mode (without =inf-cpu or =ext), we
still get timer interrupts. These can happen at arbitrary
points in time, i.e. while in timer_read(), which pushes
time forward just a little bit. Then, if we happen to get
the interrupt after calculating the new time to push to,
but before actually finishing that, the interrupt will set
the time to a value that\'s incompatible with the forward,
and we\'ll crash because time goes backwards when we do the
forwarding.
Fix this by reading the time_travel_time, calculating the
adjustment, and doing the adjustment all with interrupts
disabled.