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wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()

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[ Upstream commit b302dce3d9 ]

reg_cap.phy_id is extracted from WMI event and could be an unexpected value
in case some errors happen. As a result out-of-bound write may occur to
soc->hal_reg_cap. Fix it by validating reg_cap.phy_id before using it.

This is found during code review.

Compile tested only.

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230830020716.5420-1-quic_bqiang@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Baochen Qiang 2023-09-20 16:43:42 +03:00 committed by Greg Kroah-Hartman
parent e310aff779
commit 4dd0547e8b
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/ath/ath12k/wmi.c
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@ -3876,6 +3876,12 @@ static int ath12k_wmi_ext_hal_reg_caps(struct ath12k_base *soc,
ath12k_warn(soc, "failed to extract reg cap %d\n", i);
return ret;
}
if (reg_cap.phy_id >= MAX_RADIOS) {
ath12k_warn(soc, "unexpected phy id %u\n", reg_cap.phy_id);
return -EINVAL;
}
soc->hal_reg_cap[reg_cap.phy_id] = reg_cap;
}
return 0;