From: Sudip Mukherjee Date: Mon, 15 Jun 2015 14:35:51 +0000 (+0530) Subject: parport: fix freeing freed memory X-Git-Tag: MMI-PSA29.97-13-9~9671^2~3 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=68d35c7b3b1aa686e3039eb2626bf5e3ea8dbe81;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git parport: fix freeing freed memory After the reference count becomes 0 when put_device() is called, it will execute the release callback where we are freeing all the allocated memory associated with the device. So if we just continue on the error path then we are again freeing devname and trying to dereference par_dev which has already been free-ed in the release callback. Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/parport/share.c b/drivers/parport/share.c index 1efec44e03aa..c02b5f27798b 100644 --- a/drivers/parport/share.c +++ b/drivers/parport/share.c @@ -892,8 +892,10 @@ parport_register_dev_model(struct parport *port, const char *name, par_dev->dev.release = free_pardevice; par_dev->devmodel = true; ret = device_register(&par_dev->dev); - if (ret) - goto err_put_dev; + if (ret) { + put_device(&par_dev->dev); + goto err_put_port; + } /* Chain this onto the list */ par_dev->prev = NULL; @@ -940,8 +942,6 @@ parport_register_dev_model(struct parport *port, const char *name, return par_dev; -err_put_dev: - put_device(&par_dev->dev); err_free_devname: kfree(devname); err_free_par_dev: