AZL-97176

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

Input: evdev - fix information leak in evdevpassvalues()

In evdevpassvalues(), the inputevent structure is allocated on the kernel stack and populated field-by-field. However, it is never fully initialized. On architectures where struct inputevent contains explicit or implicit padding (such as the 32-bit __pad field on SPARC64), these padding bytes are left uninitialized.

When this event structure is subsequently passed to the client buffer and later copied to userspace, the uninitialized padding bytes leak kernel stack memory, potentially exposing sensitive information.

Similar issues exist in __evdevqueuesyn_dropped and _passevent.

Fix this by explicitly zeroing the entire event structure with memset() before populating its fields. This ensures all padding bytes are cleared before the data crosses the security boundary.