CVE-2021-47016: m68k: mvme147,mvme16x: Don't wipe PCC timer config bits
First published: Thu Feb 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: m68k: mvme147,mvme16x: Don't wipe PCC timer config bits Don't clear the timer 1 configuration bits when clearing the interrupt flag and counter overflow. As Michael reported, "This results in no timer interrupts being delivered after the first. Initialization then hangs in calibrate_delay as the jiffies counter is not updated." On mvme16x, enable the timer after requesting the irq, consistent with mvme147.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.2<5.4.119 | |
| Linux Linux kernel | >=5.5<5.10.37 | |
| Linux Linux kernel | >=5.11<5.11.21 | |
| Linux Linux kernel | >=5.12<5.12.4 |
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Reference Links
- https://git.kernel.org/stable/c/f6a90818a32058fca62cda3a2027a6a2364e1878
- https://git.kernel.org/stable/c/1dfb26df15fc7036a74221d43de7427f74293dae
- https://git.kernel.org/stable/c/73fdeb612d25b5e105c219e05434285a45d23576
- https://git.kernel.org/stable/c/5d34225169346cab5145978d153b9ce90e9ace21
- https://git.kernel.org/stable/c/43262178c043032e7c42d00de44c818ba05f9967
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