Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
7c87942aef52d2120e95ff1dec739998b9f95a78 to < 3d7b5391bb95505b3581c1fb77150c467ab92864affected7c87942aef52d2120e95ff1dec739998b9f95a78 to < 438f9a303ea8b55162b2d5376490c2ab3ec165a0affected7c87942aef52d2120e95ff1dec739998b9f95a78 to < 9b7d77cb046b4487e8e511e04e62b6f416ce845caffected7c87942aef52d2120e95ff1dec739998b9f95a78 to < 86183153c299e8bb1839e717286d6c6f39508a59affected7c87942aef52d2120e95ff1dec739998b9f95a78 to < 93bdf715d33cf5ee01c58e8546c2469c71ce082aaffected7c87942aef52d2120e95ff1dec739998b9f95a78 to < c0def811ad8d642dca9b6d31a198cc39f5f90837affected7c87942aef52d2120e95ff1dec739998b9f95a78 to < dfaf235d5a6b60cbf115a14a656946303ad007b7affected7c87942aef52d2120e95ff1dec739998b9f95a78 to < 39fe0eac6d755ef215026518985fcf8de9360e9eaffected
Linux Linux
Default version status: affected
2.6.32affected0 to < 2.6.32unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.14 to ≤ 6.18.*unaffected6.19.4 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
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 ↗