diff options
| author | Ming Lei <ming.lei@redhat.com> | 2020-08-17 18:00:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-09 19:12:34 +0200 |
| commit | 84c041c12442d233c9b3c593cbe9eb8a77875578 (patch) | |
| tree | 780698c5a1bc706fe04046251b68d8e5457845c1 /include/linux/task_work.h | |
| parent | b6e4827c04b029fefc8a6401589938aa95a7c0cb (diff) | |
block: allow for_each_bvec to support zero len bvec
commit 7e24969022cbd61ddc586f14824fc205661bb124 upstream.
Block layer usually doesn't support or allow zero-length bvec. Since
commit 1bdc76aea115 ("iov_iter: use bvec iterator to implement
iterate_bvec()"), iterate_bvec() switches to bvec iterator. However,
Al mentioned that 'Zero-length segments are not disallowed' in iov_iter.
Fixes for_each_bvec() so that it can move on after seeing one zero
length bvec.
Fixes: 1bdc76aea115 ("iov_iter: use bvec iterator to implement iterate_bvec()")
Reported-by: syzbot <syzbot+61acc40a49a3e46e25ea@syzkaller.appspotmail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Link: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2262077.html
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/task_work.h')
0 files changed, 0 insertions, 0 deletions