Re: [BUG] wifi: rtw88: Hard system freeze on RTL8821CE when power_save is enabled (LPS/ASPM conflict)

From: LB F

Date: Mon Apr 27 2026 - 06:21:26 EST


Hi all,

A quick erratum to my previous email:

I mistakenly wrote that the corrupted descriptor happened to have a
`drv_info_sz` of 24. It actually matched 4 (`PHY_STATUS_SIZE`). Since
`drv_info_sz` is in 8-byte units, this translates to 32 bytes.

The core conclusion remains exactly the same: the hardware randomly
generated a `drv_info_sz` of 4 (or 0) by pure coincidence. This
perfectly bypassed the `pkt_stat->drv_info_sz != PHY_STATUS_SIZE`
check, proving once again that length validation alone isn't
completely bulletproof and Panagiotis's NULL check is still required
as a safety net.

Sorry for the typo!

Best regards,
Oleksandr Havrylov