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UPSTREAM: lib/iov_iter: initialize "flags" in new pipe_buffer

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commit 9d2231c5d74e13b2a0546fee6737ee4446017903 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>
(cherry picked from commit b19ec7afa9)
Bug: 220741611
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I91076a0b6327ee8dd87e75fc875062b6adf2de4c
This commit is contained in:
Max Kellermann
2022-02-21 11:03:13 +01:00
committed by Greg Kroah-Hartman
parent 5db3e72c57
commit b9b8fd203d
1 changed files with 2 additions and 0 deletions
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2
lib/iov_iter.c
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@@ -407,6 +407,7 @@ static size_t copy_page_to_iter_pipe(struct page *page, size_t offset, size_t by
return 0; return 0;
buf->ops = &page_cache_pipe_buf_ops; buf->ops = &page_cache_pipe_buf_ops;
buf->flags = 0;
get_page(page); get_page(page);
buf->page = page; buf->page = page;
buf->offset = offset; buf->offset = offset;
@@ -543,6 +544,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size,
break; break;
buf->ops = &default_pipe_buf_ops; buf->ops = &default_pipe_buf_ops;
buf->flags = 0;
buf->page = page; buf->page = page;
buf->offset = 0; buf->offset = 0;
buf->len = min_t(ssize_t, left, PAGE_SIZE); buf->len = min_t(ssize_t, left, PAGE_SIZE);