Vulnerability CVE-2021-46920


Published: 2024-02-27

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

dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback

Current code blindly writes over the SWERR and the OVERFLOW bits. Write
back the bits actually read instead so the driver avoids clobbering the
OVERFLOW bit that comes after the register is read.

 References:
https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d
https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8
https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f

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