From: Jens Axboe axboe@kernel.dk
mainline inclusion from mainline-5.7-rc2 commit 88357580854aab29d27e1a443575caaedd081612 category: feature bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=27 CVE: NA ---------------------------
The splice file punt check uses file->f_mode to check for O_NONBLOCK, but it should be checking file->f_flags. This leads to punting even for files that have O_NONBLOCK set, which isn't necessary. This equates to checking for FMODE_PATH, which will never be set on the fd in question.
Fixes: 7d67af2c0134 ("io_uring: add splice(2) support") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: yangerkun yangerkun@huawei.com Reviewed-by: zhangyi (F) yi.zhang@huawei.com Signed-off-by: Cheng Jian cj.chengjian@huawei.com --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index e6fa6f19129c..5341aabfa400 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2757,7 +2757,7 @@ static bool io_splice_punt(struct file *file) return false; if (!io_file_supports_async(file)) return true; - return !(file->f_mode & O_NONBLOCK); + return !(file->f_flags & O_NONBLOCK); }
static int io_splice(struct io_kiocb *req, bool force_nonblock)