On Sat, Jul 30, 2022 at 12:10:33AM -0500, Eric W. Biederman wrote:
> +static int fuse_flush_async(struct file *file, fl_owner_t id)
> +{
> + struct inode *inode = file_inode(file);
> + struct fuse_mount *fm = get_fuse_mount(inode);
> + struct fuse_file *ff = file->private_data;
> + struct fuse_flush_args *fa;
> + int err;
> +
> + fa = kzalloc(sizeof(*fa), GFP_KERNEL);
> + if (!fa)
> + return -ENOMEM;
> +
> + fa->inarg.fh = ff->fh;
> + fa->inarg.lock_owner = fuse_lock_owner_id(fm->fc, id);
> + fa->args.opcode = FUSE_FLUSH;
> + fa->args.nodeid = get_node_id(inode);
> + fa->args.in_numargs = 1;
> + fa->args.in_args[0].size = sizeof(fa->inarg);
> + fa->args.in_args[0].value = &fa->inarg;
> + fa->args.force = true;
Seems like you need a
fa->args.nocreds = true;
here or you'll hit the WARN() in fuse_simple_background().
Tycho
