[PATCH 04/12] i3c: mipi-i3c-hci: Fix out of bounds access in hci_dma_irq_handler

[Jarkko Nikula]

Do not loop over ring headers in hci_dma_irq_handler() that are not
allocated and enabled in hci_dma_init(). Otherwise out of bounds access
will occur from rings->headers[i] access when i >= number of allocated
ring headers.

Signed-off-by: Jarkko Nikula <jarkko.nikula at linux.intel.com>
---
 drivers/i3c/master/mipi-i3c-hci/dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c
index 2990ac9eaade..71b5dbe45c45 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dma.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
@@ -734,7 +734,7 @@ static bool hci_dma_irq_handler(struct i3c_hci *hci, unsigned int mask)
 	unsigned int i;
 	bool handled = false;
 
-	for (i = 0; mask && i < 8; i++) {
+	for (i = 0; mask && i < rings->total; i++) {
 		struct hci_rh_data *rh;
 		u32 status;
 
-- 
2.40.1