From: Sai Teja Aluvala <aluvala.sai.teja@intel.com>
To: linux-bluetooth@vger.kernel.org
Cc: kiran.k@intel.com, chethan.tumkur.narayan@intel.com,
Sai Teja Aluvala <aluvala.sai.teja@intel.com>
Subject: [PATCH v1] Bluetooth: btintel_pcie: fix off-by-one bounds check in RX submit
Date: Fri, 11 Sep 2026 17:22:22 +0530 [thread overview]
Message-ID: <20260911115222.7651-1-aluvala.sai.teja@intel.com> (raw)
btintel_pcie_submit_rx() used frbd_index > rxq->count to guard the
FRBD array access, allowing frbd_index == rxq->count to pass through
and index one element past the end of the array. Change the check to
>= rxq->count so every out-of-range index is rejected.
This issue was reported by Claude Mythos.
Fixes: c2b636b3f788 (Bluetooth: btintel_pcie: Add support for PCIe transport)
Signed-off-by: Sai Teja Aluvala <aluvala.sai.teja@intel.com>
---
drivers/bluetooth/btintel_pcie.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
index 7a2139a04ddb..4807361a58a7 100644
--- a/drivers/bluetooth/btintel_pcie.c
+++ b/drivers/bluetooth/btintel_pcie.c
@@ -640,7 +640,7 @@ static int btintel_pcie_submit_rx(struct btintel_pcie_data *data)
frbd_index = data->ia.tr_hia[BTINTEL_PCIE_RXQ_NUM];
- if (frbd_index > rxq->count)
+ if (frbd_index >= rxq->count)
return -ERANGE;
/* Prepare for RX submit. It updates the FRBD with the address of DMA
--
2.53.0
next reply other threads:[~2026-09-11 12:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-11 11:52 Sai Teja Aluvala [this message]
2026-09-11 14:28 ` [v1] Bluetooth: btintel_pcie: fix off-by-one bounds check in RX submit bluez.test.bot
2026-09-14 14:30 ` [PATCH v1] " patchwork-bot+bluetooth
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