From: Julia Lawall <julia@xxxxxxx> Data allocated with devm_ioremap or devm_ioremap_nocache should not be freed using iounmap, because doing so causes a dangling pointer, and a subsequent double free. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression x; @@ ( x = devm_ioremap(...) | x = devm_ioremap_nocache(...) ) @@ expression r.x; @@ * iounmap(x) // </smpl> Signed-off-by: Julia Lawall <julia@xxxxxxx> --- drivers/mtd/maps/lantiq-flash.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/mtd/maps/lantiq-flash.c b/drivers/mtd/maps/lantiq-flash.c index 4f10e27..7b889de 100644 --- a/drivers/mtd/maps/lantiq-flash.c +++ b/drivers/mtd/maps/lantiq-flash.c @@ -159,7 +159,7 @@ ltq_mtd_probe(struct platform_device *pdev) if (!ltq_mtd->mtd) { dev_err(&pdev->dev, "probing failed\n"); err = -ENXIO; - goto err_unmap; + goto err_free; } ltq_mtd->mtd->owner = THIS_MODULE; @@ -179,8 +179,6 @@ ltq_mtd_probe(struct platform_device *pdev) err_destroy: map_destroy(ltq_mtd->mtd); -err_unmap: - iounmap(ltq_mtd->map->virt); err_free: kfree(ltq_mtd->map); err_out: @@ -198,8 +196,6 @@ ltq_mtd_remove(struct platform_device *pdev) mtd_device_unregister(ltq_mtd->mtd); map_destroy(ltq_mtd->mtd); } - if (ltq_mtd->map->virt) - iounmap(ltq_mtd->map->virt); kfree(ltq_mtd->map); kfree(ltq_mtd); } -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
