The driver_override field from rpmsg_device should not be initialized
from const memory because the core later kfree() it, for example when
driver_override is set via sysfs.
Fixes: 950a7388f02b ("rpmsg: Turn name service into a stand alone driver")
Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
---
drivers/rpmsg/rpmsg_internal.h | 12 ++++++++++--
drivers/rpmsg/rpmsg_ns.c | 13 +++++++++++--
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h
index b1245d3ed7c6..c21e73ffbf05 100644
--- a/drivers/rpmsg/rpmsg_internal.h
+++ b/drivers/rpmsg/rpmsg_internal.h
@@ -92,10 +92,18 @@ int rpmsg_release_channel(struct rpmsg_device *rpdev,
*/
static inline int rpmsg_chrdev_register_device(struct rpmsg_device *rpdev)
{
+ int ret;
+
strcpy(rpdev->id.name, "rpmsg_chrdev");
- rpdev->driver_override = "rpmsg_chrdev";
+ rpdev->driver_override = kstrdup("rpmsg_chrdev", GFP_KERNEL);
+ if (!rpdev->driver_override)
+ return -ENOMEM;
+
+ ret = rpmsg_register_device(rpdev);
+ if (ret)
+ kfree(rpdev->driver_override);
- return rpmsg_register_device(rpdev);
+ return ret;
}
#endif
diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c
index 762ff1ae279f..7d0605307d23 100644
--- a/drivers/rpmsg/rpmsg_ns.c
+++ b/drivers/rpmsg/rpmsg_ns.c
@@ -20,12 +20,21 @@
*/
int rpmsg_ns_register_device(struct rpmsg_device *rpdev)
{
+ int ret;
+
strcpy(rpdev->id.name, "rpmsg_ns");
- rpdev->driver_override = "rpmsg_ns";
+ rpdev->driver_override = kstrdup("rpmsg_ns", GFP_KERNEL);
+ if (!rpdev->driver_override)
+ return -ENOMEM;
+
rpdev->src = RPMSG_NS_ADDR;
rpdev->dst = RPMSG_NS_ADDR;
- return rpmsg_register_device(rpdev);
+ ret = rpmsg_register_device(rpdev);
+ if (ret)
+ kfree(rpdev->driver_override);
+
+ return ret;
}
EXPORT_SYMBOL(rpmsg_ns_register_device);
--
2.32.0
