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Input: ims-pcu - fix out-of-bounds read in ims_pcu_irq() debug logging

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The debug logging in ims_pcu_irq() unconditionally prints data from
pcu->urb_in_buf. However, if the interrupt fired for pcu->urb_ctrl, the
actual data resides in pcu->urb_ctrl_buf. If urb->actual_length for the
control URB exceeds pcu->max_in_size, this leads to an out-of-bounds
read.

Fix this by printing from the correct buffer associated with the URB.

Fixes: 628329d524 ("Input: add IMS Passenger Control Unit driver")
Cc: stable@vger.kernel.org
Reported-by: Sashiko bot <sashiko-bot@kernel.org>
Assisted-by: Gemini:gemini-3.1-pro
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2026-05-22 10:30:21 -07:00
parent baf5697580
commit 403b0a6970
1 changed files with 1 additions and 1 deletions
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2
drivers/input/misc/ims-pcu.c
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@ -1536,7 +1536,7 @@ static void ims_pcu_irq(struct urb *urb)
}
dev_dbg(pcu->dev, "%s: received %d: %*ph\n", __func__,
urb->actual_length, urb->actual_length, pcu->urb_in_buf);
urb->actual_length, urb->actual_length, urb->transfer_buffer);
if (urb == pcu->urb_in)
ims_pcu_process_data(pcu, urb);