Bug 2389489 (CVE-2025-38583)

Summary: CVE-2025-38583 kernel: clk: xilinx: vcu: unregister pll_post only if registered correctly
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-08-19 18:03:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

clk: xilinx: vcu: unregister pll_post only if registered correctly

If registration of pll_post is failed, it will be set to NULL or ERR,
unregistering same will fail with following call trace:

Unable to handle kernel NULL pointer dereference at virtual address 008
pc : clk_hw_unregister+0xc/0x20
lr : clk_hw_unregister_fixed_factor+0x18/0x30
sp : ffff800011923850
...
Call trace:
 clk_hw_unregister+0xc/0x20
 clk_hw_unregister_fixed_factor+0x18/0x30
 xvcu_unregister_clock_provider+0xcc/0xf4 [xlnx_vcu]
 xvcu_probe+0x2bc/0x53c [xlnx_vcu]
Comment 1 Keith Grant 2025-08-19 19:40:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025081914-CVE-2025-38583-ca53@gregkh/T