CVE-2025-38266

In the Linux kernel, the following vulnerability has been resolved:

pinctrl: mediatek: eint: Fix invalid pointer dereference for v1 platforms

Commit 3ef9f710efcb ("pinctrl: mediatek: Add EINT support for multiple addresses") introduced an access to the 'soc' field of struct mtkpinctrl in mtkeintdoinit() and for that an include of pinctrl-mtk-common-v2.h.

However, pinctrl drivers relying on the v1 common driver include pinctrl-mtk-common.h instead, which provides another definition of struct mtk_pinctrl that does not contain an 'soc' field.

Since mtkeintdo_init() can be called both by v1 and v2 drivers, it will now try to dereference an invalid pointer when called on v1 platforms. This has been observed on Genio 350 EVK (MT8365), which crashes very early in boot (the kernel trace can only be seen with earlycon).

In order to fix this, since 'struct mtkpinctrl' was only needed to get a 'struct mtkeintpin', make 'struct mtkeintpin' a parameter of mtkeintdoinit() so that callers need to supply it, removing mtkeintdoinit()'s dependency on any particular 'struct mtkpinctrl'.