Linaro-mm-sig September 2018

linaro-mm-sig@lists.linaro.org

7 participants
33 discussions

[PATCH 09/10] udmabuf: use EBADFD in case we didn't got a memfd

by Gerd Hoffmann

Reported-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Gerd Hoffmann <kraxel(a)redhat.com> --- drivers/dma-buf/udmabuf.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index ec46513a47..1862bb6bed 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -154,14 +154,17 @@ static long udmabuf_create(struct const udmabuf_create_list *head, pgbuf = 0; for (i = 0; i < head->count; i++) { + ret = -EBADFD; memfd = fget(list[i].memfd); if (!memfd) goto err; if (!shmem_mapping(file_inode(memfd)->i_mapping)) goto err; seals = memfd_fcntl(memfd, F_GET_SEALS, 0); - if (seals == -EINVAL || - (seals & SEALS_WANTED) != SEALS_WANTED || + if (seals == -EINVAL) + goto err; + ret = -EINVAL; + if ((seals & SEALS_WANTED) != SEALS_WANTED || (seals & SEALS_DENIED) != 0) goto err; pgoff = list[i].offset >> PAGE_SHIFT; -- 2.9.3

6 years, 3 months

Re: [Linaro-mm-sig] [PATCH] android:ion: the order and count are in the wrong position

by Laura Abbott

On 09/07/2018 08:20 AM, jun qian wrote: > The value in the wrong position will cause misunderstanding, > when the debug infomations display in the window. > I think the existing order is okay, it's just not separated well. It's "$count pages of order $order". I also just acked a patch to remove all this code because it's dead on mainline anyway. For future work, we should look to make the debugfs output clearer to avoid ambiguity. Thanks, Laura > Signed-off-by: jun qian <hangdianqj(a)163.com> > --- > drivers/staging/android/ion/ion_system_heap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c > index 701eb9f3b0f1..54b8a7710958 100644 > --- a/drivers/staging/android/ion/ion_system_heap.c > +++ b/drivers/staging/android/ion/ion_system_heap.c > @@ -225,10 +225,10 @@ static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s, > pool = sys_heap->pools[i]; > > seq_printf(s, "%d order %u highmem pages %lu total\n", > - pool->high_count, pool->order, > + pool->order, pool->high_count, > (PAGE_SIZE << pool->order) * pool->high_count); > seq_printf(s, "%d order %u lowmem pages %lu total\n", > - pool->low_count, pool->order, > + pool->order, pool->low_count, > (PAGE_SIZE << pool->order) * pool->low_count); > } > >

6 years, 3 months

Re: [Linaro-mm-sig] [PATCH] dma-buf/udmabuf: Fix NULL pointer dereference in udmabuf_create

by Gerd Hoffmann

On Tue, Sep 04, 2018 at 02:07:49PM -0500, Gustavo A. R. Silva wrote: > There is a potential execution path in which pointer memfd is NULL when > passed as argument to fput(), hence there is a NULL pointer dereference > in fput(). > > Fix this by null checking *memfd* before calling fput(). > > Addresses-Coverity-ID: 1473174 ("Explicit null dereferenced") > Fixes: fbb0de795078 ("Add udmabuf misc device") > Signed-off-by: Gustavo A. R. Silva <gustavo(a)embeddedor.com> Pushed to drm-misc-next. thanks, Gerd

6 years, 3 months

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Linaro-mm-sig September 2018