CVE-2023-53620

Description

In the Linux kernel, the following vulnerability has been resolved: md: fix soft lockup in status_resync status_resync() will calculate 'curr_resync - recovery_active' to show user a progress bar like following: [============>........] resync = 61.4% 'curr_resync' and 'recovery_active' is updated in md_do_sync(), and status_resync() can read them concurrently, hence it's possible that 'curr_resync - recovery_active' can overflow to a huge number. In this case status_resync() will be stuck in the loop to print a large amount of '=', which will end up soft lockup. Fix the problem by setting 'resync' to MD_RESYNC_ACTIVE in this case, this way resync in progress will be reported to user.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/b4acb6c3ede88d6b7d33742a09e63cfce5e7fb69 ↗
• https://git.kernel.org/stable/c/23309704e90859af2662bedc44101e6d1d2ece7e ↗
• https://git.kernel.org/stable/c/6efddf1e32e2a264694766ca485a4f5e04ee82a7 ↗