Bluetooth: btintel_pcie: validate TX skb length in send_sync

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btintel_pcie_prepare_tx() copies skb->len bytes into a fixed
BTINTEL_PCIE_BUFFER_SIZE (4096) DMA slot via an unchecked memcpy.
Oversized packets are currently rejected only in
btintel_pcie_send_frame(); any future caller of
btintel_pcie_send_sync() would silently overflow the DMA buffer.

Add the bounds check in btintel_pcie_send_sync() itself, right
before skb_push() and the DMA copy.

Assisted-by: Copilot:claude-sonnet-5 code-review code-generation
Fixes: 6e65a09f92 ("Bluetooth: btintel_pcie: Add *setup* function to download firmware")
Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

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Chandrashekar Devegowda 2026-09-08 15:26:58 +05:30 • committed by Luiz Augusto von Dentz

parent 6610c6fe4b

commit 4b837ebd0e

1 changed files with 6 additions and 0 deletions

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drivers/bluetooth/btintel_pcie.c

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