Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed() In `probe()`, `request_irq()` is called before allocating/registering a `power_supply` handle. If an interrupt is fired between the call to `request_irq()` and `power_supply_register()`, the `power_supply` handle will be used uninitialized in `power_supply_changed()` in `wm97xx_bat_update()` (triggered from the interrupt handler). This will lead to a `NULL` pointer dereference since Fix this racy `NULL` pointer dereference by making sure the IRQ is requested _after_ the registration of the `power_supply` handle. Since the IRQ is the last thing requests in the `probe()` now, remove the error path for freeing it. Instead add one for unregistering the `power_supply` handle when IRQ request fails.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 3d7b5391bb95505b3581c1fb77150c467ab92864; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 438f9a303ea8b55162b2d5376490c2ab3ec165a0; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 9b7d77cb046b4487e8e511e04e62b6f416ce845c; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 86183153c299e8bb1839e717286d6c6f39508a59; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 93bdf715d33cf5ee01c58e8546c2469c71ce082a; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before c0def811ad8d642dca9b6d31a198cc39f5f90837; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before dfaf235d5a6b60cbf115a14a656946303ad007b7; affected 7c87942aef52d2120e95ff1dec739998b9f95a78 before 39fe0eac6d755ef215026518985fcf8de9360e9e |
| Linux / Linux | affected 2.6.32; unaffected 0 before 2.6.32; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864
- https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0
- https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c
- https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59
- https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a
- https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837
- https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7
- https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e