On 16/03/2022 16:08, Krzysztof Kozlowski wrote:
The driver_override field from platform driver should not be initialized from static memory (string literal) because the core later kfree() it, for example when driver_override is set via sysfs.
Use dedicated helper to set driver_override properly.
Fixes: 950a7388f02b ("rpmsg: Turn name service into a stand alone driver") Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface") Cc: stable@vger.kernel.org Signed-off-by: Krzysztof Kozlowski krzysztof.kozlowski@canonical.com Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org
drivers/rpmsg/rpmsg_core.c | 3 ++- drivers/rpmsg/rpmsg_internal.h | 11 +++++++++-- drivers/rpmsg/rpmsg_ns.c | 14 ++++++++++++-- include/linux/rpmsg.h | 6 ++++-- 4 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 79368a957d89..95fc283f6af7 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -400,7 +400,8 @@ field##_store(struct device *dev, struct device_attribute *attr, \ const char *buf, size_t sz) \ { \ struct rpmsg_device *rpdev = to_rpmsg_device(dev); \
- char *new, *old; \
- const char *old; \
- char *new; \ \ new = kstrndup(buf, sz, GFP_KERNEL); \ if (!new) \
diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index d4b23fd019a8..dd1f4ed616b6 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -95,9 +95,16 @@ int rpmsg_release_channel(struct rpmsg_device *rpdev, static inline int rpmsg_ctrldev_register_device(struct rpmsg_device *rpdev) { strcpy(rpdev->id.name, "rpmsg_ctrl");
- rpdev->driver_override = "rpmsg_ctrl";
- ret = driver_set_override(&rpdev->dev, &rpdev->driver_override,
"rpmsg_ctrl", strlen("rpmsg_ctrl"));
I made here a mistake while rebasing. This will need a v6.
Best regards, Krzysztof