[media] rc: ene_ir: fix potential double free in ene_probe()

Since rc_unregister_device() frees its argument, the subsequently
call to rc_free_device() on the same variable will cause a double
free bug. Fix by set argument to NULL, thus when fall through to
rc_free_device(), nothing will be done there.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/rc/ene_ir.c b/drivers/media/rc/ene_ir.c
index ee6c984..ed184f6 100644 (file)
--- a/drivers/media/rc/ene_ir.c
+++ b/drivers/media/rc/ene_ir.c
@@ -1098,6 +1098,7 @@ exit_release_hw_io:
        release_region(dev->hw_io, ENE_IO_SIZE);
 exit_unregister_device:
        rc_unregister_device(rdev);
+       rdev = NULL;
 exit_free_dev_rdev:
        rc_free_device(rdev);
        kfree(dev);