On 04.06.21 18:11, Greg Kurz wrote:
As soon as fuse_dentry_automount() does up_write(&sb->s_umount), the superblock can theoretically be killed. If this happens before the submount was added to the &fc->mounts list, fuse_mount_remove() later crashes in list_del_init() because it assumes the submount to be already there. Add the submount before dropping sb->s_umount to fix the inconsistency. It is okay to nest fc->killsb under sb->s_umount, we already do this on the ->kill_sb() path. Signed-off-by: Greg Kurz <groug@xxxxxxxx> --- fs/fuse/dir.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Reviewed-by: Max Reitz <mreitz@xxxxxxxxxx>
