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lib/iov_iter: initialize "flags" in new pipe_buffer 

commit 9d2231c5d7 upstream.

The functions copy_page_to_iter_pipe() and push_pipe() can both
allocate a new pipe_buffer, but the "flags" member initializer is
missing.

Fixes: 241699cd72 ("new iov_iter flavour: pipe-backed")
To: Alexander Viro <viro@zeniv.linux.org.uk>
To: linux-fsdevel@vger.kernel.org
To: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Max Kellermann 2022-02-21 11:03:13 +01:00 committed by Greg Kroah-Hartman
parent 98fed38143
commit c460ef6e05
1 changed files with 2 additions and 0 deletions
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2
lib/iov_iter.c
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@ -370,6 +370,7 @@ static size_t copy_page_to_iter_pipe(struct page *page, size_t offset, size_t by
return 0;
pipe->nrbufs++;
buf->ops = &page_cache_pipe_buf_ops;
buf->flags = 0;
get_page(buf->page = page);
buf->offset = offset;
buf->len = bytes;
@ -494,6 +495,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size,
break;
pipe->nrbufs++;
pipe->bufs[idx].ops = &default_pipe_buf_ops;
pipe->bufs[idx].flags = 0;
pipe->bufs[idx].page = page;
pipe->bufs[idx].offset = 0;
if (left <= PAGE_SIZE) {