refresh_exported_devices() doesn't check udev_device_new_from_syspath()
return value and passed in null dev to udev_device_get_driver() resulting
in a segmentation fault. Change it to check for null return value from
both udev_device_new_from_syspath() and udev_device_get_driver().
Signed-off-by: Shuah Khan <shuah.kh@xxxxxxxxxxx>
---
drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
index c5bf60b..92caef7 100644
--- a/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
@@ -118,6 +118,7 @@ static int refresh_exported_devices(void)
struct udev_list_entry *devices, *dev_list_entry;
struct udev_device *dev;
const char *path;
+ const char *driver;
enumerate = udev_enumerate_new(udev_context);
udev_enumerate_add_match_subsystem(enumerate, "usb");
@@ -128,10 +129,12 @@ static int refresh_exported_devices(void)
udev_list_entry_foreach(dev_list_entry, devices) {
path = udev_list_entry_get_name(dev_list_entry);
dev = udev_device_new_from_syspath(udev_context, path);
+ if (dev == NULL)
+ continue;
/* Check whether device uses usbip-host driver. */
- if (!strcmp(udev_device_get_driver(dev),
- USBIP_HOST_DRV_NAME)) {
+ driver = udev_device_get_driver(dev);
+ if (driver != NULL && !strcmp(driver, USBIP_HOST_DRV_NAME)) {
edev = usbip_exported_device_new(path);
if (!edev) {
dbg("usbip_exported_device_new failed");
--
1.7.10.4
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