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Commit 8a3177db authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

cuse: fix ioctl 



cuse_process_init_reply() doesn't initialize fc->max_pages and thus all
cuse bases ioctls fail with ENOMEM.

Reported-by: default avatarAndreas Steinmetz <ast@domdv.de>
Fixes: 5da784cc ("fuse: add max_pages to init_out")
Cc: <stable@vger.kernel.org> # v4.20
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 97e1532e

fs/fuse/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -628,6 +628,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns) 
	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_block *sb, void *data, int silent) 
	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;