Bugzilla – Bug 1221269
VUL-0: CVE-2023-52498: kernel: PM: sleep: Fix possible deadlocks in core system-wide PM code
Last modified: 2024-06-25 18:20:02 UTC
In the Linux kernel, the following vulnerability has been resolved: PM: sleep: Fix possible deadlocks in core system-wide PM code It is reported that in low-memory situations the system-wide resume core code deadlocks, because async_schedule_dev() executes its argument function synchronously if it cannot allocate memory (and not only in that case) and that function attempts to acquire a mutex that is already held. Executing the argument function synchronously from within dpm_async_fn() may also be problematic for ordering reasons (it may cause a consumer device's resume callback to be invoked before a requisite supplier device's one, for example). Address this by changing the code in question to use async_schedule_dev_nocall() for scheduling the asynchronous execution of device suspend and resume functions and to directly run them synchronously if async_schedule_dev_nocall() returns false. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52498 https://git.kernel.org/stable/c/9bd3dce27b01c51295b60e1433e1dadfb16649f7 https://git.kernel.org/stable/c/a1d62c775b07213c73f81ae842424c74dd14b5f0 https://git.kernel.org/stable/c/e1c9d32c98309ae764893a481552d3f99d46cb34 https://git.kernel.org/stable/c/e681e29d1f59a04ef773296e4bebb17b1b79f8fe https://git.kernel.org/stable/c/f46eb832389f162ad13cb780d0b8cde93641990d https://www.cve.org/CVERecord?id=CVE-2023-52498 https://git.kernel.org/stable/c/7839d0078e0d5e6cc2fa0b0dfbee71de74f1e557 https://bugzilla.redhat.com/show_bug.cgi?id=2269063
I had 3 days off last week, looks like Oliver already added the patch (for SLE 15 SP6 and ALP) The stable submissions shows that this is needed in kernels 5.7+, means we would need this in SLE 15 SP5 as well.