Bug 2266376 (CVE-2021-46917) - CVE-2021-46917 kernel: wq reset does not clear WQCFG registers
Summary: CVE-2021-46917 kernel: wq reset does not clear WQCFG registers
Keywords:
Status: NEW
Alias: CVE-2021-46917
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266383
Blocks: 2266369
TreeView+ depends on / blocked
 
Reported: 2024-02-27 17:39 UTC by Rohit Keshri
Modified: 2024-03-26 18:29 UTC (History)
49 users (show)

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Description Rohit Keshri 2024-02-27 17:39:48 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: fix wq cleanup of WQCFG registers

A pre-release silicon erratum workaround where wq reset does not clear
WQCFG registers was leaked into upstream code. Use wq reset command
instead of blasting the MMIO region. This also address an issue where
we clobber registers in future devices.

https://git.kernel.org/stable/c/e5eb9757fe4c2392e069246ae78badc573af1833
https://git.kernel.org/stable/c/ea9aadc06a9f10ad20a90edc0a484f1147d88a7a
https://git.kernel.org/stable/c/f7dc8f5619165e1fa3383d0c2519f502d9e2a1a9
Comment 1 Rohit Keshri 2024-02-27 17:57:38 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266383]
Comment 3 Justin M. Forbes 2024-02-27 18:23:44 UTC 
This was fixed for Fedora with the 5.11.16 stable kernel update.
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