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Change History

https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65

https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de

CISA-ADP AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA-ADP CWE-416

In the Linux kernel, the following vulnerability has been resolved:

sh: push-switch: Reorder cleanup operations to avoid use-after-free bug

The original code puts flush_work() before timer_shutdown_sync()
in switch_drv_remove(). Although we use flush_work() to stop
the worker, it could be rescheduled in switch_timer(). As a result,
a use-after-free bug can occur. The details are shown below:

      (cpu 0)                    |      (cpu 1)
switch_drv_remove()              |
 flush_work()      

kernel.org https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65 [No types assigned]

kernel.org https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de [No types assigned]