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udmabuf: use EBADFD in case we didn't got a memfd

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Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180911134216.9760-10-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2018-09-11 15:42:12 +02:00
parent 0d17455ca8
commit 7a1c67d780
1 changed files with 5 additions and 2 deletions
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7
drivers/dma-buf/udmabuf.c
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@ -154,14 +154,17 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
pgbuf = 0; pgbuf = 0;
for (i = 0; i < head->count; i++) { for (i = 0; i < head->count; i++) {
ret = -EBADFD;
memfd = fget(list[i].memfd); memfd = fget(list[i].memfd);
if (!memfd) if (!memfd)
goto err; goto err;
if (!shmem_mapping(file_inode(memfd)->i_mapping)) if (!shmem_mapping(file_inode(memfd)->i_mapping))
goto err; goto err;
seals = memfd_fcntl(memfd, F_GET_SEALS, 0); seals = memfd_fcntl(memfd, F_GET_SEALS, 0);
if (seals == -EINVAL || if (seals == -EINVAL)
(seals & SEALS_WANTED) != SEALS_WANTED || goto err;
ret = -EINVAL;
if ((seals & SEALS_WANTED) != SEALS_WANTED ||
(seals & SEALS_DENIED) != 0) (seals & SEALS_DENIED) != 0)
goto err; goto err;
pgoff = list[i].offset >> PAGE_SHIFT; pgoff = list[i].offset >> PAGE_SHIFT;