On 01-Jun-26 18:16, Andrzej Kacprowski wrote:
Fix potential buffer overflow where firmware-supplied data_size is cast to signed int before being used in min_t(). Large unsigned values (>= 0x80000000) become negative, causing unsigned wraparound and oversized memcpy operations that can overflow the stack buffer.Change min_t(int, ...) to min() as both values are unsigned and can be handled by min() without explicit cast. Fixes: 3b434a3445ff ("accel/ivpu: Use threaded IRQ to handle JOB done messages") Cc: <[email protected]> # v6.12+ Signed-off-by: Andrzej Kacprowski <[email protected]> --- Changes in v2: - Replaced min_t() with min()
Reviewed-by: Karol Wachowski <[email protected]>
drivers/accel/ivpu/ivpu_ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/accel/ivpu/ivpu_ipc.c b/drivers/accel/ivpu/ivpu_ipc.c index f47df092bb0d..9347f05a2b79 100644 --- a/drivers/accel/ivpu/ivpu_ipc.c +++ b/drivers/accel/ivpu/ivpu_ipc.c @@ -276,7 +276,7 @@ int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, if (ipc_buf) memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf)); if (rx_msg->jsm_msg) { - u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); + u32 size = min(rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg));if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) {ivpu_err(vdev, "IPC resp result error: %d\n", rx_msg->jsm_msg->result);
