From 2c16d291236b50f4af83dcdc687ee405c22ad0d3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Thu, 5 Nov 2020 17:06:30 +0100 Subject: Revert "mm: mmap: fix fput in error path v2" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The kernel test robot is not happy with that. This reverts commit 0227da01f2559626396af5f6c7453360db86c1f6. Signed-off-by: Christian König Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/394772/ --- drivers/dma-buf/dma-buf.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'drivers/dma-buf') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 282bd8b84170..0eb80c1ecdab 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -1166,6 +1166,9 @@ EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access); int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, unsigned long pgoff) { + struct file *oldfile; + int ret; + if (WARN_ON(!dmabuf || !vma)) return -EINVAL; @@ -1183,11 +1186,22 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, return -EINVAL; /* readjust the vma */ - fput(vma->vm_file); - vma->vm_file = get_file(dmabuf->file); + get_file(dmabuf->file); + oldfile = vma->vm_file; + vma->vm_file = dmabuf->file; vma->vm_pgoff = pgoff; - return dmabuf->ops->mmap(dmabuf, vma); + ret = dmabuf->ops->mmap(dmabuf, vma); + if (ret) { + /* restore old parameters on failure */ + vma->vm_file = oldfile; + fput(dmabuf->file); + } else { + if (oldfile) + fput(oldfile); + } + return ret; + } EXPORT_SYMBOL_GPL(dma_buf_mmap); -- cgit v1.2.3