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Message-Id: <1394587461-8574-1-git-send-email-nobuhiro.iwamatsu.yj@renesas.com> Date: Wed, 12 Mar 2014 10:24:21 +0900 From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com> To: linux-kernel@...r.kernel.org Cc: gregkh@...uxfoundation.org, Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com> Subject: [PATCH] uio: Fix memory size check with vma in uio_mmap_physical() Register for the device are mapped in uio_mmap_physical(). In this case, it might not be the same as the size of VMA always. This uses PAGE_ALIGN to memory size, fix the check of the memory size to be mapped. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com> --- drivers/uio/uio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index a673e5b..e371f5a 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -655,7 +655,7 @@ static int uio_mmap_physical(struct vm_area_struct *vma) if (mem->addr & ~PAGE_MASK) return -ENODEV; - if (vma->vm_end - vma->vm_start > mem->size) + if (vma->vm_end - vma->vm_start > PAGE_ALIGN(mem->size)) return -EINVAL; vma->vm_ops = &uio_physical_vm_ops; -- 1.8.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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