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charset="utf-8" On 32-bit architectures, calling round_up(io.length, 8) can overflow when io.length is close to SIZE_MAX, as the internal addition (io.length + 7) wraps around. This may result in aligned_len becoming smaller than io.length (even zero), bypassing subsequent bounds checks. This can lead to an out-of-bounds write when the original io.length is used in memory operations. Add an explicit check to ensure io.length + 7 does not overflow before calling round_up(). Fixes: 3ae9dcce8400 ("firmware: drivers: imx: adds miscdev") Reported-by: sashiko-bot Closes: https://sashiko.dev/#/patchset/20260514090321.2186877-1-pankaj.gupt= a@nxp.com?part=3D Signed-off-by: Pankaj Gupta --- drivers/firmware/imx/se_ctrl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/imx/se_ctrl.c b/drivers/firmware/imx/se_ctrl.c index 4914d3b6bf0b..05ea7efc016d 100644 --- a/drivers/firmware/imx/se_ctrl.c +++ b/drivers/firmware/imx/se_ctrl.c @@ -672,7 +672,7 @@ static int se_ioctl_setup_iobuf_handler(struct se_if_de= vice_ctx *dev_ctx, goto copy; } =20 - if (io.length > SIZE_MAX - 7) { + if ((size_t)io.length > SIZE_MAX - 7) { dev_err(dev_ctx->priv->dev, "%s: Invalid buffer length.", dev_ctx->devname); return -EINVAL; --=20 2.43.0