CVE-2025-22009 (GCVE-0-2025-22009)
Vulnerability from cvelistv5
Published
2025-04-08 08:17
Modified
2026-05-11 21:10
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: regulator: dummy: force synchronous probing Sometimes I get a NULL pointer dereference at boot time in kobject_get() with the following call stack: anatop_regulator_probe() devm_regulator_register() regulator_register() regulator_resolve_supply() kobject_get() By placing some extra BUG_ON() statements I could verify that this is raised because probing of the 'dummy' regulator driver is not completed ('dummy_regulator_rdev' is still NULL). In the JTAG debugger I can see that dummy_regulator_probe() and anatop_regulator_probe() can be run by different kernel threads (kworker/u4:*). I haven't further investigated whether this can be changed or if there are other possibilities to force synchronization between these two probe routines. On the other hand I don't expect much boot time penalty by probing the 'dummy' regulator synchronously.
References
Impacted products
Vendor Product Version
Linux Linux Version: 259b93b21a9ffe5117af4dfb5505437e463c6a5a
Version: 259b93b21a9ffe5117af4dfb5505437e463c6a5a
Version: 259b93b21a9ffe5117af4dfb5505437e463c6a5a
Version: 259b93b21a9ffe5117af4dfb5505437e463c6a5a
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: dummy: force synchronous probing\n\nSometimes I get a NULL pointer dereference at boot time in kobject_get()\nwith the following call stack:\n\nanatop_regulator_probe()\n devm_regulator_register()\n  regulator_register()\n   regulator_resolve_supply()\n    kobject_get()\n\nBy placing some extra BUG_ON() statements I could verify that this is\nraised because probing of the \u0027dummy\u0027 regulator driver is not completed\n(\u0027dummy_regulator_rdev\u0027 is still NULL).\n\nIn the JTAG debugger I can see that dummy_regulator_probe() and\nanatop_regulator_probe() can be run by different kernel threads\n(kworker/u4:*).  I haven\u0027t further investigated whether this can be\nchanged or if there are other possibilities to force synchronization\nbetween these two probe routines.  On the other hand I don\u0027t expect much\nboot time penalty by probing the \u0027dummy\u0027 regulator synchronously."
        }
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    "dateReserved": "2024-12-29T08:45:45.803Z",
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