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fuse: add missing FR_FORCE

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commit 2e38bea99a upstream.

fuse_file_put() was missing the "force" flag for the RELEASE request when
sending synchronously (fuseblk).

If this flag is not set, then a sync request may be interrupted before it
is dequeued by the userspace filesystem.  In this case the OPEN won't be
balanced with a RELEASE.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 5a18ec176c ("fuse: fix hang of single threaded fuseblk filesystem")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miklos Szeredi
2017-02-22 20:08:25 +01:00
committed by Greg Kroah-Hartman
parent abf74467e7
commit 1e6be9c19c
1 changed files with 1 additions and 0 deletions
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fs/fuse/file.c
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@@ -100,6 +100,7 @@ static void fuse_file_put(struct fuse_file *ff, bool sync)
iput(req->misc.release.inode); iput(req->misc.release.inode);
fuse_put_request(ff->fc, req); fuse_put_request(ff->fc, req);
} else if (sync) { } else if (sync) {
__set_bit(FR_FORCE, &req->flags);
__clear_bit(FR_BACKGROUND, &req->flags); __clear_bit(FR_BACKGROUND, &req->flags);
fuse_request_send(ff->fc, req); fuse_request_send(ff->fc, req);
iput(req->misc.release.inode); iput(req->misc.release.inode);