zloop opens its zone files by name below the base directory but a bind mount can put any file there, including a procfs or sysfs file. Refuse files on pseudo filesystems as zone files just like loop does.
Signed-off-by: Christian Brauner (Amutable) <[email protected]> --- drivers/block/zloop.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/block/zloop.c b/drivers/block/zloop.c index 65634a39b0bf..dcc06dd47b04 100644 --- a/drivers/block/zloop.c +++ b/drivers/block/zloop.c @@ -1137,6 +1137,11 @@ static int zloop_init_zone(struct zloop_device *zlo, struct zloop_options *opts, goto out_fput; } + if (file_is_pseudo(zone->file)) { + ret = -EINVAL; + goto out_fput; + } + if (zlo->block_size) { ret = zloop_get_block_size(zlo, zone); if (ret) -- 2.53.0
