wifi: ath11k: fix writing to unintended memory region
authorP Praneesh <quic_ppranees@quicinc.com>
Fri, 24 Mar 2023 14:57:01 +0000 (16:57 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 11 May 2023 14:03:21 +0000 (23:03 +0900)
commitcfc7ee210f2f3c73b4981b7ab39fde90de43fbf5
treec9535a3b1236974fb0f40bce60aec226ef3fdcff
parentf43744872a04db2b1376a9af52ffe0204b928033
wifi: ath11k: fix writing to unintended memory region

[ Upstream commit 756a7f90878f0866fd2fe167ef37e90b47326b96 ]

While initializing spectral, the magic value is getting written to the
invalid memory address leading to random boot-up crash. This occurs
due to the incorrect index increment in ath11k_dbring_fill_magic_value
function. Fix it by replacing the existing logic with memset32 to ensure
there is no invalid memory access.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1-01838-QCAHKSWPL_SILICONZ-1

Fixes: d3d358efc553 ("ath11k: add spectral/CFR buffer validation support")
Signed-off-by: P Praneesh <quic_ppranees@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230321052900.16895-1-quic_ppranees@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/net/wireless/ath/ath11k/dbring.c