From 9aebf3b89281a173d2dfeee379b800be5e3f363e Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 25 Sep 2014 09:54:02 +0200 Subject: block: Validate node-name The device_name of a BlockDriverState is currently checked because it is always used as a QemuOpts ID and qemu_opts_create() checks whether such IDs are wellformed. node-name is supposed to share the same namespace, but it isn't checked currently. This patch adds explicit checks both for device_name and node-name so that the same rules will still apply even if QemuOpts won't be used any more at some point. qemu-img used to use names with spaces in them, which isn't allowed any more. Replace them with underscores. Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi --- block.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'block.c') diff --git a/block.c b/block.c index a2fa1e14b1..c5a251c57e 100644 --- a/block.c +++ b/block.c @@ -335,12 +335,22 @@ void bdrv_register(BlockDriver *bdrv) QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list); } +static bool bdrv_is_valid_name(const char *name) +{ + return qemu_opts_id_wellformed(name); +} + /* create a new block device (by default it is empty) */ BlockDriverState *bdrv_new(const char *device_name, Error **errp) { BlockDriverState *bs; int i; + if (*device_name && !bdrv_is_valid_name(device_name)) { + error_setg(errp, "Invalid device name"); + return NULL; + } + if (bdrv_find(device_name)) { error_setg(errp, "Device with id '%s' already exists", device_name); @@ -863,9 +873,9 @@ static void bdrv_assign_node_name(BlockDriverState *bs, return; } - /* empty string node name is invalid */ - if (node_name[0] == '\0') { - error_setg(errp, "Empty node name"); + /* Check for empty string or invalid characters */ + if (!bdrv_is_valid_name(node_name)) { + error_setg(errp, "Invalid node name"); return; } -- cgit v1.2.1