| From 8a3177db59cd644fde05ba9efee29392dfdec8aa Mon Sep 17 00:00:00 2001 |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| Date: Wed, 16 Jan 2019 10:27:59 +0100 |
| Subject: cuse: fix ioctl |
| |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| |
| commit 8a3177db59cd644fde05ba9efee29392dfdec8aa upstream. |
| |
| cuse_process_init_reply() doesn't initialize fc->max_pages and thus all |
| cuse bases ioctls fail with ENOMEM. |
| |
| Reported-by: Andreas Steinmetz <ast@domdv.de> |
| Fixes: 5da784cce430 ("fuse: add max_pages to init_out") |
| Cc: <stable@vger.kernel.org> # v4.20 |
| Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| fs/fuse/inode.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/fs/fuse/inode.c |
| +++ b/fs/fuse/inode.c |
| @@ -628,6 +628,7 @@ void fuse_conn_init(struct fuse_conn *fc |
| get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key)); |
| fc->pid_ns = get_pid_ns(task_active_pid_ns(current)); |
| fc->user_ns = get_user_ns(user_ns); |
| + fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; |
| } |
| EXPORT_SYMBOL_GPL(fuse_conn_init); |
| |
| @@ -1162,7 +1163,6 @@ static int fuse_fill_super(struct super_ |
| fc->user_id = d.user_id; |
| fc->group_id = d.group_id; |
| fc->max_read = max_t(unsigned, 4096, d.max_read); |
| - fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; |
| |
| /* Used by get_root_inode() */ |
| sb->s_fs_info = fc; |
