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Commit | Line | Data |
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de686e49 MT |
1 | From 114e9f141822e6977633d322c1b03e89bd209932 Mon Sep 17 00:00:00 2001 |
2 | From: Max Kellermann <max.kellermann@ionos.com> | |
3 | Date: Mon, 21 Feb 2022 11:03:13 +0100 | |
4 | Subject: [PATCH] lib/iov_iter: initialize "flags" in new pipe_buffer | |
5 | ||
6 | commit 9d2231c5d74e13b2a0546fee6737ee4446017903 upstream. | |
7 | ||
8 | The functions copy_page_to_iter_pipe() and push_pipe() can both | |
9 | allocate a new pipe_buffer, but the "flags" member initializer is | |
10 | missing. | |
11 | ||
12 | Fixes: 241699cd72a8 ("new iov_iter flavour: pipe-backed") | |
13 | To: Alexander Viro <viro@zeniv.linux.org.uk> | |
14 | To: linux-fsdevel@vger.kernel.org | |
15 | To: linux-kernel@vger.kernel.org | |
16 | Cc: stable@vger.kernel.org | |
17 | Signed-off-by: Max Kellermann <max.kellermann@ionos.com> | |
18 | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> | |
19 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
20 | --- | |
21 | lib/iov_iter.c | 2 ++ | |
22 | 1 file changed, 2 insertions(+) | |
23 | ||
24 | diff --git a/lib/iov_iter.c b/lib/iov_iter.c | |
25 | index 60b5e6edfbaa..c5b2f0f4b8a8 100644 | |
26 | --- a/lib/iov_iter.c | |
27 | +++ b/lib/iov_iter.c | |
28 | @@ -416,6 +416,7 @@ static size_t copy_page_to_iter_pipe(struct page *page, size_t offset, size_t by | |
29 | return 0; | |
30 | ||
31 | buf->ops = &page_cache_pipe_buf_ops; | |
32 | + buf->flags = 0; | |
33 | get_page(page); | |
34 | buf->page = page; | |
35 | buf->offset = offset; | |
36 | @@ -532,6 +533,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size, | |
37 | break; | |
38 | ||
39 | buf->ops = &default_pipe_buf_ops; | |
40 | + buf->flags = 0; | |
41 | buf->page = page; | |
42 | buf->offset = 0; | |
43 | buf->len = min_t(ssize_t, left, PAGE_SIZE); | |
44 | -- | |
45 | 2.30.2 | |
46 |