mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-07-08 18:13:59 +02:00
Yi Cong
ea21a4006f
commitf8a2fc809bupstream. The local variables 'mcs' and 'nss' in rtl8xxxu_update_ra_report() are passed to rtl8xxxu_desc_to_mcsrate() as output parameters. If the helper function encounters an unhandled rate index, it may return without setting these values, leading to the use of uninitialized stack data. Remove the helper rtl8xxxu_desc_to_mcsrate() and inline the logic into rtl8xxxu_update_ra_report(). This fixes the use of uninitialized 'mcs' and 'nss' variables for legacy rates. The new implementation explicitly handles: - Legacy rates: Set bitrate only. - HT rates (MCS0-15): Set MCS flags, index, and NSS (1 or 2) directly. - Invalid rates: Return early. Fixes:7de16123d9("wifi: rtl8xxxu: Introduce rtl8xxxu_update_ra_report") Cc: stable@vger.kernel.org Suggested-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Yi Cong <yicong@kylinos.cn> Link: https://lore.kernel.org/all/96e31963da0c42dcb52ce44f818963d7@realtek.com/ Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://patch.msgid.link/20260306071627.56501-1-cong.yi@linux.dev Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>