| Message ID | 20210107202616.75170-1-john.stultz@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | dma-buf: cma_heap: Fix memory leak in CMA heap | expand |
Hi John, On Fri, 8 Jan 2021 at 01:56, John Stultz <john.stultz@linaro.org> wrote: > > Bing Song noticed the CMA heap was leaking memory due to a flub > I made in commit a5d2d29e24be ("dma-buf: heaps: Move heap-helper > logic into the cma_heap implementation"), and provided this fix > which ensures the pagelist is also freed on release. Thanks for your patch. > > Cc: Bing Song <bing.song@nxp.com> > Cc: Sumit Semwal <sumit.semwal@linaro.org> > Cc: Liam Mark <lmark@codeaurora.org> > Cc: Laura Abbott <labbott@kernel.org> > Cc: Brian Starkey <Brian.Starkey@arm.com> > Cc: Hridya Valsaraju <hridya@google.com> > Cc: Suren Baghdasaryan <surenb@google.com> > Cc: Sandeep Patil <sspatil@google.com> > Cc: Daniel Mentz <danielmentz@google.com> > Cc: Chris Goldsworthy <cgoldswo@codeaurora.org> > Cc: Ørjan Eide <orjan.eide@arm.com> > Cc: Robin Murphy <robin.murphy@arm.com> > Cc: Ezequiel Garcia <ezequiel@collabora.com> > Cc: Simon Ser <contact@emersion.fr> > Cc: James Jones <jajones@nvidia.com> > Cc: linux-media@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Reported-by: Bing Song <bing.song@nxp.com> > Fixes: a5d2d29e24be ("dma-buf: heaps: Move heap-helper logic into the cma_heap implementation") > Signed-off-by: John Stultz <john.stultz@linaro.org> I will queue it up so it gets in the v5.11 cycle. > --- > drivers/dma-buf/heaps/cma_heap.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c > index 3c4e34301172..364fc2f3e499 100644 > --- a/drivers/dma-buf/heaps/cma_heap.c > +++ b/drivers/dma-buf/heaps/cma_heap.c > @@ -251,6 +251,9 @@ static void cma_heap_dma_buf_release(struct dma_buf *dmabuf) > buffer->vaddr = NULL; > } > > + /* free page list */ > + kfree(buffer->pages); > + /* release memory */ > cma_release(cma_heap->cma, buffer->cma_pages, buffer->pagecount); > kfree(buffer); > } > -- > 2.17.1 > Best, Sumit.
diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 3c4e34301172..364fc2f3e499 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -251,6 +251,9 @@ static void cma_heap_dma_buf_release(struct dma_buf *dmabuf) buffer->vaddr = NULL; } + /* free page list */ + kfree(buffer->pages); + /* release memory */ cma_release(cma_heap->cma, buffer->cma_pages, buffer->pagecount); kfree(buffer); }
Bing Song noticed the CMA heap was leaking memory due to a flub I made in commit a5d2d29e24be ("dma-buf: heaps: Move heap-helper logic into the cma_heap implementation"), and provided this fix which ensures the pagelist is also freed on release. Cc: Bing Song <bing.song@nxp.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Liam Mark <lmark@codeaurora.org> Cc: Laura Abbott <labbott@kernel.org> Cc: Brian Starkey <Brian.Starkey@arm.com> Cc: Hridya Valsaraju <hridya@google.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Sandeep Patil <sspatil@google.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: Chris Goldsworthy <cgoldswo@codeaurora.org> Cc: Ørjan Eide <orjan.eide@arm.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Ezequiel Garcia <ezequiel@collabora.com> Cc: Simon Ser <contact@emersion.fr> Cc: James Jones <jajones@nvidia.com> Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Reported-by: Bing Song <bing.song@nxp.com> Fixes: a5d2d29e24be ("dma-buf: heaps: Move heap-helper logic into the cma_heap implementation") Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/dma-buf/heaps/cma_heap.c | 3 +++ 1 file changed, 3 insertions(+)