CVE-2024-27003 — clk: Get runtime PM before walking tree for clk_summary

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: clk: Get runtime PM before walking tree for clk_summary Similar to the previous commit, we should make sure that all devices are runtime resumed before printing the clk_summary through debugfs. Failure to do so would result in a deadlock if the thread is resuming a device to print clk state and that device is also runtime resuming in another thread, e.g the screen is turning on and the display driver is starting up. We remove the calls to clk_pm_runtime_{get,put}() in this path because they're superfluous now that we know the devices are runtime resumed. This also squashes a bug where the return value of clk_pm_runtime_get() wasn't checked, leading to an RPM count underflow on error paths.

Affected (CNA)

Vendor / product	Versions
Linux / Linux	affected 1bb294a7981c737e2311a78e4086635ac0220ace before 83ada89e4a86e2b28ea2b5113c76d6dc7560a4d0; affected 1bb294a7981c737e2311a78e4086635ac0220ace before 2c077fdfd09dffb31a890e5095c8ab205138a42e; affected 1bb294a7981c737e2311a78e4086635ac0220ace before b457105309d388e4081c716cf7b81d517ff74db4; affected 1bb294a7981c737e2311a78e4086635ac0220ace before 9d1e795f754db1ac3344528b7af0b17b8146f321
Linux / Linux	affected 5.17; unaffected 0 before 5.17; unaffected 6.1.88 through 6.1.; unaffected 6.6.29 through 6.6.; unaffected 6.8.8 through 6.8.; unaffected 6.9 through

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.