[PATCH 0/2] MR8550: winebus.sys: Mind potential udev_device_get_subsystem error, don't leak fd.

[Paul Gofman (＠gofman)]

For the first patch, I observed a crash on accessing this system being NULL on one game's hang log. I don't know if that is the actual problem or consequences of something else from the info I've got, but the check looks like the right thing to do: documentation [1] lists NULL as possible error return.

1. https://manpages.debian.org/stretch/libudev-dev/udev_device_get_subsystem.3....

[PATCH 1/2] winebus.sys: Check for udev_device_get_subsystem() error in udev_add_device().

[Paul Gofman]

From: Paul Gofman

---
 dlls/winebus.sys/bus_udev.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/dlls/winebus.sys/bus_udev.c b/dlls/winebus.sys/bus_udev.c
index e35cd9d3281..ca96c80a0d1 100644
--- a/dlls/winebus.sys/bus_udev.c
+++ b/dlls/winebus.sys/bus_udev.c
@@ -1233,7 +1233,13 @@ static void udev_add_device(struct udev_device *dev, int fd)
     get_device_subsystem_info(dev, "usb", "usb_device", &desc, &bus);
     if (bus == BUS_BLUETOOTH) desc.is_bluetooth = TRUE;

-    subsystem = udev_device_get_subsystem(dev);
+    if (!(subsystem = udev_device_get_subsystem(dev)))
+    {
+        WARN("udev_device_get_subsystem failed for %s.\n", debugstr_a(devnode));
+        close(fd);
+        return;
+    }
+
     if (!strcmp(subsystem, "hidraw"))
     {
         static const WCHAR hidraw[] = {'h','i','d','r','a','w',0};

[PATCH 2/2] winebus.sys: Close fd if device is not handled in udev_add_device().

[Paul Gofman]

From: Paul Gofman

---
 dlls/winebus.sys/bus_udev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dlls/winebus.sys/bus_udev.c b/dlls/winebus.sys/bus_udev.c
index ca96c80a0d1..39b810b7588 100644
--- a/dlls/winebus.sys/bus_udev.c
+++ b/dlls/winebus.sys/bus_udev.c
@@ -1332,6 +1332,10 @@ static void udev_add_device(struct udev_device *dev, int fd)
         bus_event_queue_device_created(&event_queue, &impl->unix_device, &desc);
     }
 #endif
+    else
+    {
+        close(fd);
+    }
 }

#ifdef HAVE_SYS_INOTIFY_H

[PATCH 0/2] MR8550: winebus.sys: Mind potential udev_device_get_subsystem error, don't leak fd. - approved

[Rémi Bernon (＠rbernon)]

This merge request was approved by Rémi Bernon.