Otherwise we risk sleeping with the pipe locked for indeterminate lengths of time. Link: https://lore.kernel.org/linux-fsdevel/qk6hjuam54khlaikf2ssom6custxf5is2ekkaequf4hvode3ls@zgf7j5j4ubvw/t/#u Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx> --- fs/fuse/dev.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 1a8f82f478cb..4e8caf66c01e 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1202,7 +1202,8 @@ __releases(fiq->lock) * the 'sent' flag. */ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file, - struct fuse_copy_state *cs, size_t nbytes) + struct fuse_copy_state *cs, size_t nbytes, + bool nonblock) { ssize_t err; struct fuse_conn *fc = fud->fc; @@ -1238,7 +1239,7 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file, break; spin_unlock(&fiq->lock); - if (file->f_flags & O_NONBLOCK) + if (nonblock) return -EAGAIN; err = wait_event_interruptible_exclusive(fiq->waitq, !fiq->connected || request_pending(fiq)); @@ -1364,7 +1365,8 @@ static ssize_t fuse_dev_read(struct kiocb *iocb, struct iov_iter *to) fuse_copy_init(&cs, 1, to); - return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); + return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to), + file->f_flags & O_NONBLOCK); } static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos, @@ -1388,7 +1390,7 @@ static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos, fuse_copy_init(&cs, 1, NULL); cs.pipebufs = bufs; cs.pipe = pipe; - ret = fuse_dev_do_read(fud, in, &cs, len); + ret = fuse_dev_do_read(fud, in, &cs, len, true); if (ret < 0) goto out; -- 2.39.2
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