[PATCH 1/2][RFC] amdgpu: fix a race in kfd_mem_export_dmabuf()
Al Viro
viro at zeniv.linux.org.uk
Tue Jun 4 19:10:04 UTC 2024
On Tue, Jun 04, 2024 at 02:08:30PM -0400, Felix Kuehling wrote:
> > +int drm_gem_prime_handle_to_fd(struct drm_device *dev,
> > + struct drm_file *file_priv, uint32_t handle,
> > + uint32_t flags,
> > + int *prime_fd)
> > +{
> > + struct dma_buf *dmabuf;
> > + int fd = get_unused_fd_flags(flags);
> > +
> > + if (fd < 0)
> > + return fd;
> > +
> > + dmabuf = drm_gem_prime_handle_to_dmabuf(dev, file_priv, handle, flags);
> > + if (IS_ERR(dmabuf))
> > + return PTR_ERR(dmabuf);
That ought to be
if (IS_ERR(dmabuf)) {
put_unused_fd(fd);
return PTR_ERR(dmabuf);
}
or we'll leak an allocated descriptor. Will fix and repost...
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