Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 259b93b21a9ffe5117af4dfb5505437e463c6a5a before e26f24ca4fb940b15e092796c5993142a2558bd9; affected 259b93b21a9ffe5117af4dfb5505437e463c6a5a before d3b83a1442a09b145006eb4294b1a963c5345c9c; affected 259b93b21a9ffe5117af4dfb5505437e463c6a5a before 5ade367b56c3947c990598df92395ce737bee872; affected 259b93b21a9ffe5117af4dfb5505437e463c6a5a before 8619909b38eeebd3e60910158d7d68441fc954e9 |
| Linux / Linux | affected 6.4; unaffected 0 before 6.4; unaffected 6.6.85 through 6.6.*; unaffected 6.12.21 through 6.12.*; unaffected 6.13.9 through 6.13.*; unaffected 6.14 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e26f24ca4fb940b15e092796c5993142a2558bd9
- https://git.kernel.org/stable/c/d3b83a1442a09b145006eb4294b1a963c5345c9c
- https://git.kernel.org/stable/c/5ade367b56c3947c990598df92395ce737bee872
- https://git.kernel.org/stable/c/8619909b38eeebd3e60910158d7d68441fc954e9
ADP enrichment
No English description supplied.
No references supplied.