core: Unset device ctx if it has been destroyed

Devices can outlive their context in some cases (in particular with
python garbage collection). Guard against this by clearing the ctx
pointer so that it is not pointing to uninitialized memory.

Closes #1058

[Cherrypick from mainline commit c3639bc ("core: Unset device ctx if it has been destroyed")]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: Ic1a27aea2b29d07c93d96d98a684facc799b4259

diff --git a/libusb/core.c b/libusb/core.c
index 7893ac2..1c1ada1 100644 (file)
--- a/libusb/core.c
+++ b/libusb/core.c
@@ -2441,6 +2441,7 @@ void API_EXPORTED libusb_exit(libusb_context *ctx)
        for_each_device(_ctx, dev) {
                usbi_warn(_ctx, "device %d.%d still referenced",
                        dev->bus_number, dev->device_address);
+               DEVICE_CTX(dev) = NULL;
        }
 
        if (!list_empty(&_ctx->open_devs))

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 03df9b4..2b170fc 100644 (file)
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11692
+#define LIBUSB_NANO 11693