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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-06-24 08:30:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 12:15:23 +0300 |
| commit | 2cff35bb4573cbdbf1e0a405539dc9680004abe8 (patch) | |
| tree | 4ea3c1326563e4381806249e60c1fd55e48cd5de /include | |
| parent | cb50423e46ea585620a6be307d7f7b71587936b7 (diff) | |
| download | linux-2cff35bb4573cbdbf1e0a405539dc9680004abe8.tar.xz | |
kfifo: fix kfifo_to_user() return type
[ Upstream commit 045ed31e23aea840648c290dbde04797064960db ]
The kfifo_to_user() macro is supposed to return zero for success or
negative error codes. Unfortunately, there is a signedness bug so it
returns unsigned int. This only affects callers which try to save the
result in ssize_t and as far as I can see the only place which does that
is line6_hwdep_read().
TL;DR: s/_uint/_int/.
Link: https://lkml.kernel.org/r/YrVL3OJVLlNhIMFs@kili
Fixes: 144ecf310eb5 ("kfifo: fix kfifo_alloc() to return a signed int value")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Stefani Seibold <stefani@seibold.net>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kfifo.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h index 89fc8dc7bf38..ab9ff74818a4 100644 --- a/include/linux/kfifo.h +++ b/include/linux/kfifo.h @@ -629,7 +629,7 @@ __kfifo_uint_must_check_helper( \ * writer, you don't need extra locking to use these macro. */ #define kfifo_to_user(fifo, to, len, copied) \ -__kfifo_uint_must_check_helper( \ +__kfifo_int_must_check_helper( \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ void __user *__to = (to); \ |