Re: (subset) [PATCH] HID: apple: validate feature-report field count to prevent NULL pointer dereference

On Mon, 14 Jul 2025 00:30:08 +0100, Qasim Ijaz wrote:

A malicious HID device with quirk APPLE_MAGIC_BACKLIGHT can trigger a NULL pointer dereference whilst the power feature-report is toggled and sent to the device in apple_magic_backlight_report_set(). The power feature-report is expected to have two data fields, but if the descriptor declares one field then accessing field[1] and dereferencing it in apple_magic_backlight_report_set() becomes invalid since field[1] will be NULL.

[...]

Applied to hid/hid.git (for-6.17/apple), thanks!

[1/1] HID: apple: validate feature-report field count to prevent NULL pointer dereference https://git.kernel.org/hid/hid/c/1bb3363da862

Cheers,