This is a note to let you know that I've just added the patch titled
wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-ath12k-fix-possible-out-of-bound-write-in-ath12.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 57dfad33b014207ca7da7707e106a38ea5c7783f
Author: Baochen Qiang <quic_bqiang@xxxxxxxxxxx>
Date: Wed Sep 20 16:43:42 2023 +0300
wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()
[ Upstream commit b302dce3d9edea5b93d1902a541684a967f3c63c ]
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@xxxxxxxxxxx>
Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230830020716.5420-1-quic_bqiang@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c
index ef0f3cf35cfd1..bddf4571d50c1 100644
--- a/drivers/net/wireless/ath/ath12k/wmi.c
+++ b/drivers/net/wireless/ath/ath12k/wmi.c
@@ -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;
