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

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Reported-by: Laurent Pinchart <[email protected]>
Signed-off-by: Gerd Hoffmann <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Gerd Hoffmann 2018-09-11 15:42:12 +02:00
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;
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;