提交 f1453773 编写于 作者: N Nicholas Bellinger

target: Fix alua_access_state attribute OOPs for un-configured devices

This patch fixes a OOPs where an attempt to write to the per-device
alua_access_state configfs attribute at:

  /sys/kernel/config/target/core/$HBA/$DEV/alua/$TG_PT_GP/alua_access_state

results in an NULL pointer dereference when the backend device has not
yet been configured.

This patch adds an explicit check for DF_CONFIGURED, and fails with
-ENODEV to avoid this case.
Reported-by: NChris Boot <crb@tiger-computing.co.uk>
Reported-by: NPhilip Gaw <pgaw@darktech.org.uk>
Cc: Chris Boot <crb@tiger-computing.co.uk>
Cc: Philip Gaw <pgaw@darktech.org.uk>
Cc: stable@vger.kernel.org # 3.8+
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
上级 e7810c2d
......@@ -2227,6 +2227,11 @@ static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
" tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
return -EINVAL;
}
if (!(dev->dev_flags & DF_CONFIGURED)) {
pr_err("Unable to set alua_access_state while device is"
" not configured\n");
return -ENODEV;
}
ret = kstrtoul(page, 0, &tmp);
if (ret < 0) {
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册