From 3011684c0b0b77b0f88113ef1c15b18befc6734a Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 27 Jan 2012 15:50:55 +0300 Subject: target: handle empty string writes in sysfs These are root only and we're not likely to hit the problem in practise, but it makes the static checkers happy. Signed-off-by: Dan Carpenter Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_configfs.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 0955bb8979fb..6e043eeb1db9 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1704,13 +1704,15 @@ static ssize_t target_core_store_dev_alias( return -EINVAL; } - se_dev->su_dev_flags |= SDF_USING_ALIAS; read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); - + if (!read_bytes) + return -EINVAL; if (se_dev->se_dev_alias[read_bytes - 1] == '\n') se_dev->se_dev_alias[read_bytes - 1] = '\0'; + se_dev->su_dev_flags |= SDF_USING_ALIAS; + pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&se_dev->se_dev_group.cg_item), @@ -1753,13 +1755,15 @@ static ssize_t target_core_store_dev_udev_path( return -EINVAL; } - se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, "%s", page); - + if (!read_bytes) + return -EINVAL; if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n') se_dev->se_dev_udev_path[read_bytes - 1] = '\0'; + se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; + pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&se_dev->se_dev_group.cg_item), -- cgit v1.2.3