diff options
| -rw-r--r-- | fs/fuse/dev.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 4967bd40b95..104a62dadb9 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -128,12 +128,16 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req) } } +/* + * Called with sbput_sem held for read (request_end) or write + * (fuse_put_super). By the time fuse_put_super() is finished, all + * inodes belonging to background requests must be released, so the + * iputs have to be done within the locked region. + */ void fuse_release_background(struct fuse_conn *fc, struct fuse_req *req) { iput(req->inode); iput(req->inode2); - if (req->file) - fput(req->file); spin_lock(&fc->lock); list_del(&req->bg_entry); if (fc->num_background == FUSE_MAX_BACKGROUND) { @@ -178,6 +182,11 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req) if (fc->mounted) fuse_release_background(fc, req); up_read(&fc->sbput_sem); + + /* fput must go outside sbput_sem, otherwise it can deadlock */ + if (req->file) + fput(req->file); + if (end) end(fc, req); else |